diff --git a/pkgs/development/python-modules/addict/default.nix b/pkgs/development/python-modules/addict/default.nix
index a1fefe8778f07..f74236a3fca0c 100644
--- a/pkgs/development/python-modules/addict/default.nix
+++ b/pkgs/development/python-modules/addict/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "b3b2210e0e067a281f5646c8c5db92e99b7231ea8b0eb5f74dbdf9e259d4e494";
+    hash = "sha256-s7IhDg4GeigfVkbIxduS6ZtyMeqLDrX3Tb354lnU5JQ=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/aioextensions/default.nix b/pkgs/development/python-modules/aioextensions/default.nix
index a398f256d489b..9589d588b02e8 100644
--- a/pkgs/development/python-modules/aioextensions/default.nix
+++ b/pkgs/development/python-modules/aioextensions/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2eacc52692495f331437e8c8e9782ca71f4617ec84f174ca17acdd77631efc47";
+    hash = "sha256-LqzFJpJJXzMUN+jI6Xgspx9GF+yE8XTKF6zdd2Me/Ec=";
   };
 
   propagatedBuildInputs = [ uvloop ];
diff --git a/pkgs/development/python-modules/ajpy/default.nix b/pkgs/development/python-modules/ajpy/default.nix
index 9d0dc702882ac..ef05c0d190372 100644
--- a/pkgs/development/python-modules/ajpy/default.nix
+++ b/pkgs/development/python-modules/ajpy/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "173wm207zyi86m2ms7vscakdi4mmjqfxqsdx1gn0j9nn0gsf241h";
+    hash = "sha256-MBDh9APWJgnsC71p3B2WtZLYpmJ6H11FNSj6f4CofJw=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/args/default.nix b/pkgs/development/python-modules/args/default.nix
index f706962de445e..8a4c132ecac9c 100644
--- a/pkgs/development/python-modules/args/default.nix
+++ b/pkgs/development/python-modules/args/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "a785b8d837625e9b61c39108532d95b85274acd679693b71ebb5156848fcf814";
+    hash = "sha256-p4W42DdiXpthw5EIUy2VuFJ0rNZ5aTtx67UVaEj8+BQ=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/astunparse/default.nix b/pkgs/development/python-modules/astunparse/default.nix
index 8f367a1a15ee2..4e96b8a1900d9 100644
--- a/pkgs/development/python-modules/astunparse/default.nix
+++ b/pkgs/development/python-modules/astunparse/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "5ad93a8456f0d084c3456d059fd9a92cce667963232cbf763eac3bc5b7940872";
+    hash = "sha256-Wtk6hFbw0ITDRW0Fn9mpLM5meWMjLL92Pqw7xbeUCHI=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/asynctest/default.nix b/pkgs/development/python-modules/asynctest/default.nix
index 62333d77a3a57..62327d7620ab2 100644
--- a/pkgs/development/python-modules/asynctest/default.nix
+++ b/pkgs/development/python-modules/asynctest/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1b3zsy7p84gag6q8ai2ylyrhx213qdk2h2zb6im3xn0m5n264y62";
+    hash = "sha256-wnhihC0V2D5qNOsLKGbDI4gOs6deRIWweeoRdI/Xf6w=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/azure-mgmt-commerce/default.nix b/pkgs/development/python-modules/azure-mgmt-commerce/default.nix
index e5af60f7de31b..c4c05e4372707 100644
--- a/pkgs/development/python-modules/azure-mgmt-commerce/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-commerce/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "6f5447395503b2318f451d24f8021ee08db1cac44f1c3337ea690700419626b6";
+    hash = "sha256-b1RHOVUDsjGPRR0k+AIe4I2xysRPHDM36mkHAEGWJrY=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/azure-mgmt-relay/default.nix b/pkgs/development/python-modules/azure-mgmt-relay/default.nix
index 30837b47b0d49..32416c3a828eb 100644
--- a/pkgs/development/python-modules/azure-mgmt-relay/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-relay/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "c93b7550e64b6734bf23ce57ca974a3ea929b734c58d1fe3669728c4fd2d2eb3";
+    hash = "sha256-yTt1UOZLZzS/I85XypdKPqkptzTFjR/jZpcoxP0tLrM=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/backcall/default.nix b/pkgs/development/python-modules/backcall/default.nix
index ca1f30956a1c1..86d0b839e1596 100644
--- a/pkgs/development/python-modules/backcall/default.nix
+++ b/pkgs/development/python-modules/backcall/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "5cbdbf27be5e7cfadb448baf0aa95508f91f2bbc6c6437cd9cd06e2a4c215e1e";
+    hash = "sha256-XL2/J75efPrbRIuvCqlVCPkfK7xsZDfNnNBuKkwhXh4=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/banal/default.nix b/pkgs/development/python-modules/banal/default.nix
index 4e73816480f28..f3931d0961f1f 100644
--- a/pkgs/development/python-modules/banal/default.nix
+++ b/pkgs/development/python-modules/banal/default.nix
@@ -10,7 +10,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2fe02c9305f53168441948f4a03dfbfa2eacc73db30db4a93309083cb0e250a5";
+    hash = "sha256-L+AskwX1MWhEGUj0oD37+i6sxz2zDbSpMwkIPLDiUKU=";
   };
 
   # no tests
diff --git a/pkgs/development/python-modules/bme280spi/default.nix b/pkgs/development/python-modules/bme280spi/default.nix
index 52105a65838ab..2bcf8b1654777 100644
--- a/pkgs/development/python-modules/bme280spi/default.nix
+++ b/pkgs/development/python-modules/bme280spi/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "51682acefda6f29eaaf9f37815edbfdd48ef0e9f1509419eceafe7b440eddc6e";
+    hash = "sha256-UWgqzv2m8p6q+fN4Fe2/3UjvDp8VCUGezq/ntEDt3G4=";
   };
 
   propagatedBuildInputs = [ spidev ];
diff --git a/pkgs/development/python-modules/braceexpand/default.nix b/pkgs/development/python-modules/braceexpand/default.nix
index 5b7ae81a32516..6c650ac5a53f0 100644
--- a/pkgs/development/python-modules/braceexpand/default.nix
+++ b/pkgs/development/python-modules/braceexpand/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit version pname;
-    sha256 = "01gpcnksnqv6np28i4x8s3wkngawzgs99zvjfia57spa42ykkrg6";
+    hash = "sha256-5uU5vSDq6lNUdHL/lPT7XD07+dCok4jEtWZjq6dl9wU=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/bwapy/default.nix b/pkgs/development/python-modules/bwapy/default.nix
index 6de156ff9d2eb..b4b80eb964e47 100644
--- a/pkgs/development/python-modules/bwapy/default.nix
+++ b/pkgs/development/python-modules/bwapy/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "090qwx3vl729zn3a7sksbviyg04kc71gpbm3nd8dalqp673x1npw";
+    hash = "sha256-/NrQxzEXU9VQs6Ou+8Jhk4Dn41566qOG/UkcukfnGCQ=";
   };
   postPatch = ''
     # replace bundled bwa
diff --git a/pkgs/development/python-modules/casttube/default.nix b/pkgs/development/python-modules/casttube/default.nix
index f13a3e9d29237..5c0aa53541263 100644
--- a/pkgs/development/python-modules/casttube/default.nix
+++ b/pkgs/development/python-modules/casttube/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "10pw2sjy648pvp42lbbdmkkx79bqlkq1xcbzp1frraj9g66azljl";
+    hash = "sha256-VNKvjHlJqpxduH+xHvCkeKXT56xtLSrI3RcR46UW/II=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/cbor/default.nix b/pkgs/development/python-modules/cbor/default.nix
index 3f9052f2139b4..bb995c3d523c6 100644
--- a/pkgs/development/python-modules/cbor/default.nix
+++ b/pkgs/development/python-modules/cbor/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "1dmv163cnslyqccrybkxn0c9s1jk1mmafmgxv75iamnz5lk5l8hk";
+    hash = "sha256-EyJaJi3fVhXL2f1Vp2oNUwadGLB9Lp8Zw55qy4YJu7Y=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/chainmap/default.nix b/pkgs/development/python-modules/chainmap/default.nix
index 7a60c30ca71da..7b8cd956b5e8e 100644
--- a/pkgs/development/python-modules/chainmap/default.nix
+++ b/pkgs/development/python-modules/chainmap/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "e42aaa4b3e2f66102a11bfd563069704bfbfd84fdcb517b564effd736bf53cd9";
+    hash = "sha256-5CqqSz4vZhAqEb/VYwaXBL+/2E/ctRe1ZO/9c2v1PNk=";
   };
 
   # Requires tox
diff --git a/pkgs/development/python-modules/colorama/default.nix b/pkgs/development/python-modules/colorama/default.nix
index 9c2399d5e1614..6619c6512d545 100644
--- a/pkgs/development/python-modules/colorama/default.nix
+++ b/pkgs/development/python-modules/colorama/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "08695f5cb7ed6e0531a20572697297273c47b8cae5a63ffc6d6ed5c201be6e44";
+    hash = "sha256-CGlfXLftbgUxogVyaXKXJzxHuMrlpj/8bW7VwgG+bkQ=";
   };
 
   nativeBuildInputs = [ hatchling ];
diff --git a/pkgs/development/python-modules/colorclass/default.nix b/pkgs/development/python-modules/colorclass/default.nix
index 2efa1a0b95b15..738617ed01504 100644
--- a/pkgs/development/python-modules/colorclass/default.nix
+++ b/pkgs/development/python-modules/colorclass/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "6d4fe287766166a98ca7bc6f6312daf04a0481b1eda43e7173484051c0ab4366";
+    hash = "sha256-bU/ih3ZhZqmMp7xvYxLa8EoEgbHtpD5xc0hAUcCrQ2Y=";
   };
 
   # No tests in archive
diff --git a/pkgs/development/python-modules/cram/default.nix b/pkgs/development/python-modules/cram/default.nix
index 1f92211953ca8..a56a39f6caa55 100644
--- a/pkgs/development/python-modules/cram/default.nix
+++ b/pkgs/development/python-modules/cram/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0bvz6fwdi55rkrz3f50zsy35gvvwhlppki2yml5bj5ffy9d499vx";
+    hash = "sha256-fadEWvLOFbkKrV7EeS+FfO9XhtcfFDd+nrmU2Lgzfy8=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/cx-oracle/default.nix b/pkgs/development/python-modules/cx-oracle/default.nix
index e5b5ad0cec64a..6005a0e69934d 100644
--- a/pkgs/development/python-modules/cx-oracle/default.nix
+++ b/pkgs/development/python-modules/cx-oracle/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "cx_Oracle";
     inherit version;
-    sha256 = "3b2d215af4441463c97ea469b9cc307460739f89fdfa8ea222ea3518f1a424d9";
+    hash = "sha256-Oy0hWvREFGPJfqRpucwwdGBzn4n9+o6iIuo1GPGkJNk=";
   };
 
   preConfigure = ''
diff --git a/pkgs/development/python-modules/cxxfilt/default.nix b/pkgs/development/python-modules/cxxfilt/default.nix
index bce948304e9d3..249bb6338ca1b 100644
--- a/pkgs/development/python-modules/cxxfilt/default.nix
+++ b/pkgs/development/python-modules/cxxfilt/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "7df6464ba5e8efbf0d8974c0b2c78b32546676f06059a83515dbdfa559b34214";
+    hash = "sha256-ffZGS6Xo778NiXTAsseLMlRmdvBgWag1FdvfpVmzQhQ=";
   };
 
   postPatch =
diff --git a/pkgs/development/python-modules/dbglib/default.nix b/pkgs/development/python-modules/dbglib/default.nix
index e53b235267fe7..1977cbe01b276 100644
--- a/pkgs/development/python-modules/dbglib/default.nix
+++ b/pkgs/development/python-modules/dbglib/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
   pyproject = true;
   src = fetchPypi {
     inherit pname version;
-    sha256 = "7b4fd5c4949af435a7ab558f87b406acd5ddf9dc7f01fc3b3e99ebcec9a4674c";
+    hash = "sha256-e0/VxJSa9DWnq1WPh7QGrNXd+dx/Afw7PpnrzsmkZ0w=";
   };
   propagatedBuildInputs = [ poetry-core ];
   pythonImportsCheck = [ "dbglib" ];
diff --git a/pkgs/development/python-modules/deprecation/default.nix b/pkgs/development/python-modules/deprecation/default.nix
index 21ab1bc24df21..b1ac6b317eba0 100644
--- a/pkgs/development/python-modules/deprecation/default.nix
+++ b/pkgs/development/python-modules/deprecation/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1zqqjlgmhgkpzg9ss5ki8wamxl83xn51fs6gn2a8cxsx9vkbvcvj";
+    hash = "sha256-crO95k5dd4aUsM9oF4rtA9FeFUdxFq3T+3c+WB+VGP8=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/devgoldyutils/default.nix b/pkgs/development/python-modules/devgoldyutils/default.nix
index f3a757a0a2d1c..0a3041a111335 100644
--- a/pkgs/development/python-modules/devgoldyutils/default.nix
+++ b/pkgs/development/python-modules/devgoldyutils/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2kGu9QPP5WqKv2gO9DAkE9SNDerzNaEDRt5DrrYD9nQ=";
+    hash = "sha256-2kGu9QPP5WqKv2gO9DAkE9SNDerzNaEDRt5DrrYD9nQ=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/django-raster/default.nix b/pkgs/development/python-modules/django-raster/default.nix
index 9a5fa30422f9b..b27e3b071c4ae 100644
--- a/pkgs/development/python-modules/django-raster/default.nix
+++ b/pkgs/development/python-modules/django-raster/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "213758fe96d74be502f69f2620f7666961a85caa0551d14573637315035a9745";
+    hash = "sha256-ITdY/pbXS+UC9p8mIPdmaWGoXKoFUdFFc2NzFQNal0U=";
   };
 
   # Tests require a postgresql + postgis server
diff --git a/pkgs/development/python-modules/django-tagging/default.nix b/pkgs/development/python-modules/django-tagging/default.nix
index e211031ecaebe..5a2ca5b5d9480 100644
--- a/pkgs/development/python-modules/django-tagging/default.nix
+++ b/pkgs/development/python-modules/django-tagging/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "28d68fa4831705e51ad7d1e845ed6dd9e354f9b6f8a5f63b655a430646ef4e8d";
+    hash = "sha256-KNaPpIMXBeUa19HoRe1t2eNU+bb4pfY7ZVpDBkbvTo0=";
   };
 
   # error: invalid command 'test'
diff --git a/pkgs/development/python-modules/djmail/default.nix b/pkgs/development/python-modules/djmail/default.nix
index 3e7128aeffe6f..05cc11548d3af 100644
--- a/pkgs/development/python-modules/djmail/default.nix
+++ b/pkgs/development/python-modules/djmail/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "cf3ce7626305d218a8bf2b6a219266ef8061aceeefc1c70a54170f4105465202";
+    hash = "sha256-zzznYmMF0hiovytqIZJm74BhrO7vwccKVBcPQQVGUgI=";
   };
 
   nativeBuildInputs = [ glibcLocales ];
diff --git a/pkgs/development/python-modules/dmenu/default.nix b/pkgs/development/python-modules/dmenu/default.nix
index aa935b7d2f613..a26b2c89c31cc 100644
--- a/pkgs/development/python-modules/dmenu/default.nix
+++ b/pkgs/development/python-modules/dmenu/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "dmenu";
-    sha256 = "06v2fq0ciallbib7sbk4kncj0n3gdqp1kz8n5k2669x49wyh34wm";
+    hash = "sha256-lZMBPU+kJ2PELBb9GS5ub1ggmZ1kLn1WXJSqyAB2Yhs=";
   };
 
   propagatedBuildInputs = [ dmenu ];
diff --git a/pkgs/development/python-modules/dockerpty/default.nix b/pkgs/development/python-modules/dockerpty/default.nix
index 26b7b00ccc890..5bb5967597ebc 100644
--- a/pkgs/development/python-modules/dockerpty/default.nix
+++ b/pkgs/development/python-modules/dockerpty/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1kjn64wx23jmr8dcc6g7bwlmrhfmxr77gh6iphqsl39sayfxdab9";
+    hash = "sha256-aanWnVc6DaoxvNHAd07u1cFcKV/nGcYaylUO0TkxVs4=";
   };
 
   propagatedBuildInputs = [ six ];
diff --git a/pkgs/development/python-modules/docloud/default.nix b/pkgs/development/python-modules/docloud/default.nix
index 246b06fad4854..d0f250cc1bb12 100644
--- a/pkgs/development/python-modules/docloud/default.nix
+++ b/pkgs/development/python-modules/docloud/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "996d55407498fd01e6c6c480f367048f92255e9ca9db0e9ea19aaef91328a441";
+    hash = "sha256-mW1VQHSY/QHmxsSA82cEj5IlXpyp2w6eoZqu+RMopEE=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/docopt/default.nix b/pkgs/development/python-modules/docopt/default.nix
index 62504275a7fd3..30066c2ef3ee8 100644
--- a/pkgs/development/python-modules/docopt/default.nix
+++ b/pkgs/development/python-modules/docopt/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "14f4hn6d1j4b99svwbaji8n2zj58qicyz19mm0x6pmhb50jsics9";
+    hash = "sha256-SbOoJSgL1ms6qDWF71nEqMgvLIpSLb51SovI0IyFxJE=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/docrep/default.nix b/pkgs/development/python-modules/docrep/default.nix
index 2aeb00ebe324b..9881a4eb85a1d 100644
--- a/pkgs/development/python-modules/docrep/default.nix
+++ b/pkgs/development/python-modules/docrep/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ed8a17e201abd829ef8da78a0b6f4d51fb99a4cbd0554adbed3309297f964314";
+    hash = "sha256-7YoX4gGr2CnvjaeKC29NUfuZpMvQVUrb7TMJKX+WQxQ=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/easywatch/default.nix b/pkgs/development/python-modules/easywatch/default.nix
index f20a6b7b91ca4..bf07ea00279f7 100644
--- a/pkgs/development/python-modules/easywatch/default.nix
+++ b/pkgs/development/python-modules/easywatch/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "1b40cjigv7s9qj8hxxy6yhwv0320z7qywrigwgkasgh80q0xgphc";
+    hash = "sha256-DN7XAQYIPq3m4y9m7vH5QAywOfTG9w6RxEmf/aJkgKw=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/edward/default.nix b/pkgs/development/python-modules/edward/default.nix
index 2041bc1ce1da1..28fd79b4d464a 100644
--- a/pkgs/development/python-modules/edward/default.nix
+++ b/pkgs/development/python-modules/edward/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "3818b39e77c26fc1a37767a74fdd5e7d02877d75ed901ead2f40bd03baaa109f";
+    hash = "sha256-OBiznnfCb8Gjd2enT91efQKHfXXtkB6tL0C9A7qqEJ8=";
   };
 
   # disabled for now due to Tensorflow trying to create files in $HOME:
diff --git a/pkgs/development/python-modules/eggdeps/default.nix b/pkgs/development/python-modules/eggdeps/default.nix
index 5feaa5e35825e..500ec96647118 100644
--- a/pkgs/development/python-modules/eggdeps/default.nix
+++ b/pkgs/development/python-modules/eggdeps/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "tl.eggdeps";
-    sha256 = "a094ed7961a3dd38fcaaa69cf7a58670038acdff186360166d9e3d964b7a7323";
+    hash = "sha256-oJTteWGj3Tj8qqac96WGcAOKzf8YY2AWbZ49lkt6cyM=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/elevate/default.nix b/pkgs/development/python-modules/elevate/default.nix
index 225ce304ea065..a8ec60f81eeca 100644
--- a/pkgs/development/python-modules/elevate/default.nix
+++ b/pkgs/development/python-modules/elevate/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "53ad19fa1de301fb1de3f8768fb3a5894215716fd96a475690c4d0ff3b1de209";
+    hash = "sha256-U60Z+h3jAfsd4/h2j7OliUIVcW/ZakdWkMTQ/zsd4gk=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/enrich/default.nix b/pkgs/development/python-modules/enrich/default.nix
index 717ba634426db..f107d0254a1fd 100644
--- a/pkgs/development/python-modules/enrich/default.nix
+++ b/pkgs/development/python-modules/enrich/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0a2ab0d2931dff8947012602d1234d2a3ee002d9a355b5d70be6bf5466008893";
+    hash = "sha256-Ciqw0pMd/4lHASYC0SNNKj7gAtmjVbXXC+a/VGYAiJM=";
   };
 
   buildInputs = [ setuptools-scm ];
diff --git a/pkgs/development/python-modules/environmental-override/default.nix b/pkgs/development/python-modules/environmental-override/default.nix
index c61823ff7a19d..7e2c2145162dd 100644
--- a/pkgs/development/python-modules/environmental-override/default.nix
+++ b/pkgs/development/python-modules/environmental-override/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1vhd37i6f8xh6kd61yxc2ynzgcln7v2p7fyzjmhbkdnws6gwfs6s";
+    hash = "sha256-2mjHn9Hctrlgld+7c8U+lrL3rRes+2DaNLAjZ+IZDe4=";
   };
 
   # No tests have been written for this library.
diff --git a/pkgs/development/python-modules/envoy-utils/default.nix b/pkgs/development/python-modules/envoy-utils/default.nix
index 126042bf94349..af4d77753a5db 100644
--- a/pkgs/development/python-modules/envoy-utils/default.nix
+++ b/pkgs/development/python-modules/envoy-utils/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "envoy_utils";
     inherit version;
-    sha256 = "13zn0d6k2a4nls9vp8cs0w07bgg4138vz18cadjadhm8p6r3bi0c";
+    hash = "sha256-DMQ1srmowqZkUwyFv9EI5L11AAeaobuTppYoMU0D9o8=";
   };
 
   propagatedBuildInputs = [ zeroconf ];
diff --git a/pkgs/development/python-modules/etesync/default.nix b/pkgs/development/python-modules/etesync/default.nix
index c5ce2cd1685e5..cc21446ceeba7 100644
--- a/pkgs/development/python-modules/etesync/default.nix
+++ b/pkgs/development/python-modules/etesync/default.nix
@@ -31,7 +31,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f20f7e9922ee789c4b71379676ebfe656b675913fe524f2ee722e1b9ef4e5197";
+    hash = "sha256-8g9+mSLueJxLcTeWduv+ZWtnWRP+Uk8u5yLhue9OUZc=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/ewmh/default.nix b/pkgs/development/python-modules/ewmh/default.nix
index 7acff2a6b90b4..b65b22f3d463a 100644
--- a/pkgs/development/python-modules/ewmh/default.nix
+++ b/pkgs/development/python-modules/ewmh/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0g9l14my3v8zlgq1yd8wh5gpara0qcapsfmvg7lq2lapglzhjsy5";
+    hash = "sha256-xWsJP31XUYHpebs6fRXDQGV1X4EcNR/wox/t4SsJND0=";
   };
 
   propagatedBuildInputs = [ python-xlib ];
diff --git a/pkgs/development/python-modules/facebook-sdk/default.nix b/pkgs/development/python-modules/facebook-sdk/default.nix
index 35ce112fd918f..002f0ffda20f8 100644
--- a/pkgs/development/python-modules/facebook-sdk/default.nix
+++ b/pkgs/development/python-modules/facebook-sdk/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "138grz0n6plzdqgi4h6hhszf58bsvx9v76cwj51g1nd3kvkd5g6a";
+    hash = "sha256-yrzS5p6j2fBCkZyZs1PfeqHivobQQBIfbp9eY8HPD40=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/fastdiff/default.nix b/pkgs/development/python-modules/fastdiff/default.nix
index fa48eb1dc657c..eb5a820b30fed 100644
--- a/pkgs/development/python-modules/fastdiff/default.nix
+++ b/pkgs/development/python-modules/fastdiff/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "4dfa09c47832a8c040acda3f1f55fc0ab4d666f0e14e6951e6da78d59acd945a";
+    hash = "sha256-TfoJxHgyqMBArNo/H1X8CrTWZvDhTmlR5tp41ZrNlFo=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/fastentrypoints/default.nix b/pkgs/development/python-modules/fastentrypoints/default.nix
index 44e9fe52cc4a1..5fa528bb6224e 100644
--- a/pkgs/development/python-modules/fastentrypoints/default.nix
+++ b/pkgs/development/python-modules/fastentrypoints/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "02s1j8i2dzbpbwgq2a3fiqwm3cnmhii2qzc0k42l0rdxd4a4ya7z";
+    hash = "sha256-/yhPFGm9ZUAFmYB9LGKE1bJROY5uKIEfX3f9JiKSQQs=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/fiblary3-fork/default.nix b/pkgs/development/python-modules/fiblary3-fork/default.nix
index c4c2d3610b3cf..d942fd0d28222 100644
--- a/pkgs/development/python-modules/fiblary3-fork/default.nix
+++ b/pkgs/development/python-modules/fiblary3-fork/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "001wqh7gx2dv3sf7a5xsbppz9r88f5qwrp05jzjsjcm6cbcvmsz0";
+    hash = "sha256-4Ou62WKmMqnllwXczHFxCOX07126F3WcHruJ/g7EPAA=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/filebrowser-safe/default.nix b/pkgs/development/python-modules/filebrowser-safe/default.nix
index 4d5b173d95fcf..798ed7a70ac58 100644
--- a/pkgs/development/python-modules/filebrowser-safe/default.nix
+++ b/pkgs/development/python-modules/filebrowser-safe/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "filebrowser_safe";
     inherit version;
-    sha256 = "499c5dbd9e112dfc436cae7713b2fb664a59015021f6c9d131e3b7980aeb5c94";
+    hash = "sha256-SZxdvZ4RLfxDbK53E7L7ZkpZAVAh9snRMeO3mArrXJQ=";
   };
 
   buildInputs = [ django ];
diff --git a/pkgs/development/python-modules/firetv/default.nix b/pkgs/development/python-modules/firetv/default.nix
index 882b86fcb7564..ab527d88019ac 100644
--- a/pkgs/development/python-modules/firetv/default.nix
+++ b/pkgs/development/python-modules/firetv/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "602de77411c2caffb322e4ff63fa6cc4eeb9a50c5f4b14e13930ed7cd87cf513";
+    hash = "sha256-YC3ndBHCyv+zIuT/Y/psxO65pQxfSxThOTDtfNh89RM=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/flake8-polyfill/default.nix b/pkgs/development/python-modules/flake8-polyfill/default.nix
index 985cd74f7b84b..0e28690bba962 100644
--- a/pkgs/development/python-modules/flake8-polyfill/default.nix
+++ b/pkgs/development/python-modules/flake8-polyfill/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1nlf1mkqw856vi6782qcglqhaacb23khk9wkcgn55npnjxshhjz4";
+    hash = "sha256-5EsIdZf22lLsY5OnCecQiykFMX0MC3RM3KYgjmcNjto=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/flashtext/default.nix b/pkgs/development/python-modules/flashtext/default.nix
index 7ab7f67b74354..89fbe9bac9753 100644
--- a/pkgs/development/python-modules/flashtext/default.nix
+++ b/pkgs/development/python-modules/flashtext/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1kq5idfp9skqkjdcld40igxn2yqjly8jpmxawkp0skwxw29jpgm1";
+    hash = "sha256-ob4rk+CdTw3u5KrXK5GnEnth+4uANMqanHjqdF2LBc8=";
   };
 
   # json files that tests look for don't exist in the pypi dist
diff --git a/pkgs/development/python-modules/flask-gravatar/default.nix b/pkgs/development/python-modules/flask-gravatar/default.nix
index bf5deaa021860..859234adcf851 100644
--- a/pkgs/development/python-modules/flask-gravatar/default.nix
+++ b/pkgs/development/python-modules/flask-gravatar/default.nix
@@ -24,7 +24,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "Flask-Gravatar";
     inherit version;
-    sha256 = "YGZfMcLGEokdto/4Aek+06CIHGyOw0arxk0qmSP1YuE=";
+    hash = "sha256-YGZfMcLGEokdto/4Aek+06CIHGyOw0arxk0qmSP1YuE=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/flask-swagger/default.nix b/pkgs/development/python-modules/flask-swagger/default.nix
index fe84a12912df4..2e2d92480e676 100644
--- a/pkgs/development/python-modules/flask-swagger/default.nix
+++ b/pkgs/development/python-modules/flask-swagger/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b4085f5bc36df4c20b6548cd1413adc9cf35719b0f0695367cd542065145294d";
+    hash = "sha256-tAhfW8Nt9MILZUjNFBOtyc81cZsPBpU2fNVCBlFFKU0=";
   };
 
   # No Tests
diff --git a/pkgs/development/python-modules/fpdf/default.nix b/pkgs/development/python-modules/fpdf/default.nix
index 4b71d8d36f39c..ef468bbd6911d 100644
--- a/pkgs/development/python-modules/fpdf/default.nix
+++ b/pkgs/development/python-modules/fpdf/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0yb73c2clv581sgak5jvlvkj4wy3jav6ms5ia8jx3rw969w40n0j";
+    hash = "sha256-ElhAeDKJ59ElUrHoaraSw3Mi56ZblqmeDqhsygQbZ3k=";
   };
 
   # No tests available
diff --git a/pkgs/development/python-modules/fs-s3fs/default.nix b/pkgs/development/python-modules/fs-s3fs/default.nix
index 3c707f2a13f88..71ce7bfd41d3b 100644
--- a/pkgs/development/python-modules/fs-s3fs/default.nix
+++ b/pkgs/development/python-modules/fs-s3fs/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b57f8c7664460ff7b451b4b44ca2ea9623a374d74e1284c2d5e6df499dc7976c";
+    hash = "sha256-tX+MdmRGD/e0UbS0TKLqliOjdNdOEoTC1ebfSZ3Hl2w=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/func-timeout/default.nix b/pkgs/development/python-modules/func-timeout/default.nix
index 8b6a09149f306..72425a4edeba1 100644
--- a/pkgs/development/python-modules/func-timeout/default.nix
+++ b/pkgs/development/python-modules/func-timeout/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "func_timeout";
     inherit version;
-    sha256 = "74cd3c428ec94f4edfba81f9b2f14904846d5ffccc27c92433b8b5939b5575dd";
+    hash = "sha256-dM08Qo7JT07fuoH5svFJBIRtX/zMJ8kkM7i1k5tVdd0=";
   };
 
   nativeCheckInputs = [ pytestCheckHook ];
diff --git a/pkgs/development/python-modules/funcsigs/default.nix b/pkgs/development/python-modules/funcsigs/default.nix
index fc2ae9722c9a9..822acf8a64738 100644
--- a/pkgs/development/python-modules/funcsigs/default.nix
+++ b/pkgs/development/python-modules/funcsigs/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0l4g5818ffyfmfs1a924811azhjj8ax9xd1cffr1mzd3ycn0zfx7";
+    hash = "sha256-p7sPLPOj/Rqycyy0nrpCUsKvQkBEJBW0q847hwIqj1A=";
   };
 
   # https://github.com/testing-cabal/funcsigs/issues/10
diff --git a/pkgs/development/python-modules/future-fstrings/default.nix b/pkgs/development/python-modules/future-fstrings/default.nix
index 949532f3a24a8..5992fa8465fa4 100644
--- a/pkgs/development/python-modules/future-fstrings/default.nix
+++ b/pkgs/development/python-modules/future-fstrings/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "future_fstrings";
-    sha256 = "6cf41cbe97c398ab5a81168ce0dbb8ad95862d3caf23c21e4430627b90844089";
+    hash = "sha256-bPQcvpfDmKtagRaM4Nu4rZWGLTyvI8IeRDBie5CEQIk=";
   };
 
   # No tests included in Pypi archive
diff --git a/pkgs/development/python-modules/future-typing/default.nix b/pkgs/development/python-modules/future-typing/default.nix
index 0dcd260c118c6..572cc5feafcf6 100644
--- a/pkgs/development/python-modules/future-typing/default.nix
+++ b/pkgs/development/python-modules/future-typing/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "future_typing";
     inherit version;
-    sha256 = "65fdc5034a95db212790fee5e977fb0a2df8deb60dccf3bac17d6d2b1a9bbacd";
+    hash = "sha256-Zf3FA0qV2yEnkP7l6Xf7Ci343rYNzPO6wX1tKxqbus0=";
   };
 
   doCheck = false; # No tests in pypi source. Did not get tests from GitHub source to work.
diff --git a/pkgs/development/python-modules/fuzzywuzzy/default.nix b/pkgs/development/python-modules/fuzzywuzzy/default.nix
index 12708a956184b..21b3fc9d7f7b9 100644
--- a/pkgs/development/python-modules/fuzzywuzzy/default.nix
+++ b/pkgs/development/python-modules/fuzzywuzzy/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage (finalAttrs: {
   src = fetchPypi {
     inherit (finalAttrs) version;
     pname = "fuzzywuzzy";
-    sha256 = "1s00zn75y2dkxgnbw8kl8dw4p1mc77cv78fwfa4yb0274s96w0a5";
+    hash = "sha256-RQFukiZHgOWJctyhs9k5rIZLeEN0Ir7s67MJX479AOg=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/genome-collector/default.nix b/pkgs/development/python-modules/genome-collector/default.nix
index c36f1fa31bdb8..a805e5f8fc380 100644
--- a/pkgs/development/python-modules/genome-collector/default.nix
+++ b/pkgs/development/python-modules/genome-collector/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "genome_collector";
     inherit version;
-    sha256 = "0023ihrz0waxbhq28xh1ymvk51ih882y9psg4glm6s9d1zmqvdph";
+    hash = "sha256-8LaN6w8taVPpI0/f5AVCMIYyd/UBdiQwXF1x8DOMQwA=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/genzshcomp/default.nix b/pkgs/development/python-modules/genzshcomp/default.nix
index 3050aa77188b0..e423e920fa26b 100644
--- a/pkgs/development/python-modules/genzshcomp/default.nix
+++ b/pkgs/development/python-modules/genzshcomp/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "b582910d36f9ad0992756d7e9ccbe3e5cf811934b1002b51f25b99d3dda9d573";
+    hash = "sha256-tYKRDTb5rQmSdW1+nMvj5c+BGTSxACtR8luZ092p1XM=";
   };
 
   buildInputs = [ setuptools ];
diff --git a/pkgs/development/python-modules/geoip/default.nix b/pkgs/development/python-modules/geoip/default.nix
index d2af48f5049f8..0886b4e4dd15b 100644
--- a/pkgs/development/python-modules/geoip/default.nix
+++ b/pkgs/development/python-modules/geoip/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "GeoIP";
     inherit version;
-    sha256 = "1rphxf3vrn8wywjgr397f49s0s22m83lpwcq45lm0h2p45mdm458";
+    hash = "sha256-qJDaaiFXQFBpIZjxSweqQmigE3Enjfwk9xzZvIfr8OY=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/getkey/default.nix b/pkgs/development/python-modules/getkey/default.nix
index a4c6e406f49bb..380677b9c47b8 100644
--- a/pkgs/development/python-modules/getkey/default.nix
+++ b/pkgs/development/python-modules/getkey/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0ng0ihfagh9g8hral0bq5nhjlp3csqghyv3z8b7ylkdkqc1cgiv8";
+    hash = "sha256-aMfHAsOzTerPQn9sDx/WbFwqoS14AaoyRC/BpxyM4Fk=";
   };
 
   # disable coverage, because we don't care and python-coveralls is not in nixpkgs
diff --git a/pkgs/development/python-modules/gflags/default.nix b/pkgs/development/python-modules/gflags/default.nix
index 312822f8de767..7ab964ac498b3 100644
--- a/pkgs/development/python-modules/gflags/default.nix
+++ b/pkgs/development/python-modules/gflags/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "40ae131e899ef68e9e14aa53ca063839c34f6a168afe622217b5b875492a1ee2";
+    hash = "sha256-QK4THome9o6eFKpTygY4OcNPahaK/mIiF7W4dUkqHuI=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/ghdiff/default.nix b/pkgs/development/python-modules/ghdiff/default.nix
index f200f0e17e5cb..387054a3eb691 100644
--- a/pkgs/development/python-modules/ghdiff/default.nix
+++ b/pkgs/development/python-modules/ghdiff/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "17mdhi2sq9017nq8rkjhhc87djpi5z99xiil0xz17dyplr7nmkqk";
+    hash = "sha256-E89qT6bXtxN+BzTGntIv8cp2EINQzoywPQEkrEWErZ4=";
   };
 
   nativeCheckInputs = [ zope-testrunner ];
diff --git a/pkgs/development/python-modules/github-webhook/default.nix b/pkgs/development/python-modules/github-webhook/default.nix
index 6db61b55c9bbd..91f6bbba0c38e 100644
--- a/pkgs/development/python-modules/github-webhook/default.nix
+++ b/pkgs/development/python-modules/github-webhook/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "b2444dbfd03deda35792bd00ebd1692597c2605c61445da79da6322afaca7a8d";
+    hash = "sha256-skRNv9A97aNXkr0A69FpJZfCYFxhRF2nnaYyKvrKeo0=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/glob2/default.nix b/pkgs/development/python-modules/glob2/default.nix
index f72a9f2977b2e..278a3554accfd 100644
--- a/pkgs/development/python-modules/glob2/default.nix
+++ b/pkgs/development/python-modules/glob2/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "135bj8gm6vn45vv0phrvhyir36kfm17y7kmasxinv8lagk8dphw5";
+    hash = "sha256-hcPb0HyKom1j16rO40+obpqRo4c7wwv2LsRuUx+Sq4w=";
   };
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/gntp/default.nix b/pkgs/development/python-modules/gntp/default.nix
index 62acd02f72844..cba4b764293b6 100644
--- a/pkgs/development/python-modules/gntp/default.nix
+++ b/pkgs/development/python-modules/gntp/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1q6scs8lp84v0aph6b5c9jhv51rhq2vmzpdd38db92ybkq0g597l";
+    hash = "sha256-9KTyAJ7Li7QaGq3dX7fAMIeyoUysLAOvApugS5Fm2uA=";
   };
 
   pythonImportsCheck = [
diff --git a/pkgs/development/python-modules/halo/default.nix b/pkgs/development/python-modules/halo/default.nix
index 9750b7686691b..1497e8616e563 100644
--- a/pkgs/development/python-modules/halo/default.nix
+++ b/pkgs/development/python-modules/halo/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "1mn97h370ggbc9vi6x8r6akd5q8i512y6kid2nvm67g93r9a6rvv";
+    hash = "sha256-e2ejUh7pHVO3FS1O40UoEeHSpjIZdRN3Yus9cAY8ydY=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/handout/default.nix b/pkgs/development/python-modules/handout/default.nix
index fedcbf7d23cfb..2d89c74f1a6d8 100644
--- a/pkgs/development/python-modules/handout/default.nix
+++ b/pkgs/development/python-modules/handout/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "52daaf1f9a4cb2ceb88c1dedf85d22ef449b9422b424a2534d21f941e57bc915";
+    hash = "sha256-UtqvH5pMss64jB3t+F0i70SblCK0JKJTTSH5QeV7yRU=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/hopcroftkarp/default.nix b/pkgs/development/python-modules/hopcroftkarp/default.nix
index e7a5efdc5bda8..5af177bf80c54 100644
--- a/pkgs/development/python-modules/hopcroftkarp/default.nix
+++ b/pkgs/development/python-modules/hopcroftkarp/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "28a7887db81ad995ccd36a1b5164a4c542b16d2781e8c49334dc9d141968c0e7";
+    hash = "sha256-KKeIfbga2ZXM02obUWSkxUKxbSeB6MSTNNydFBlowOc=";
   };
 
   # tests fail due to bad package name
diff --git a/pkgs/development/python-modules/hsaudiotag3k/default.nix b/pkgs/development/python-modules/hsaudiotag3k/default.nix
index a0ab3f77d2b61..240f7ed7c8c67 100644
--- a/pkgs/development/python-modules/hsaudiotag3k/default.nix
+++ b/pkgs/development/python-modules/hsaudiotag3k/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ef60e9210d4727e82f0095a686cb07b676d055918f0c59c5bfa8598da03e59d1";
+    hash = "sha256-72DpIQ1HJ+gvAJWmhssHtnbQVZGPDFnFv6hZjaA+WdE=";
   };
 
   # no tests
diff --git a/pkgs/development/python-modules/httpie-ntlm/default.nix b/pkgs/development/python-modules/httpie-ntlm/default.nix
index 345df5e3ce4d3..6b67a63e7c75d 100644
--- a/pkgs/development/python-modules/httpie-ntlm/default.nix
+++ b/pkgs/development/python-modules/httpie-ntlm/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b1f757180c0bd60741ea16cf91fc53d47df402a5c287c4a61a14b335ea0552b3";
+    hash = "sha256-sfdXGAwL1gdB6hbPkfxT1H30AqXCh8SmGhSzNeoFUrM=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/httpretty/default.nix b/pkgs/development/python-modules/httpretty/default.nix
index 9a65c1dbab5df..ef41e6ac30634 100644
--- a/pkgs/development/python-modules/httpretty/default.nix
+++ b/pkgs/development/python-modules/httpretty/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "20de0e5dd5a18292d36d928cc3d6e52f8b2ac73daec40d41eb62dee154933b68";
+    hash = "sha256-IN4OXdWhgpLTbZKMw9blL4sqxz2uxA1B62Le4VSTO2g=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/humanfriendly/default.nix b/pkgs/development/python-modules/humanfriendly/default.nix
index c21d2b0dfc913..7538b71be966e 100644
--- a/pkgs/development/python-modules/humanfriendly/default.nix
+++ b/pkgs/development/python-modules/humanfriendly/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "6b0b831ce8f15f7300721aa49829fc4e83921a9a301cc7f606be6686a2288ddc";
+    hash = "sha256-awuDHOjxX3MAchqkmCn8ToOSGpowHMf2Br5mhqIojdw=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/hypchat/default.nix b/pkgs/development/python-modules/hypchat/default.nix
index 3842d10d8dcab..0df6dad57d8a3 100644
--- a/pkgs/development/python-modules/hypchat/default.nix
+++ b/pkgs/development/python-modules/hypchat/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1sd8f3gihagaqd848dqy6xw457fa4f9bla1bfyni7fq3h76sjdzg";
+    hash = "sha256-7zepzYEDuxOtdysoupIjyp1CeDceN0RQw+opGN9wqOk=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/hyperlink/default.nix b/pkgs/development/python-modules/hyperlink/default.nix
index 3bfd9a6e2ca61..898f626194e3c 100644
--- a/pkgs/development/python-modules/hyperlink/default.nix
+++ b/pkgs/development/python-modules/hyperlink/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0sx50lkivsfjxx9zr4yh7l9gll2l9kvl0v0w8w4wk2x5v9bzjyj2";
+    hash = "sha256-Qnr5V9qli8kJRxxsQPdMVFD6Ej3Qk/xT79LpHScFpWs=";
   };
 
   propagatedBuildInputs = [ idna ];
diff --git a/pkgs/development/python-modules/hyperopt/default.nix b/pkgs/development/python-modules/hyperopt/default.nix
index 0ac4984528012..d1f4efb48ac3d 100644
--- a/pkgs/development/python-modules/hyperopt/default.nix
+++ b/pkgs/development/python-modules/hyperopt/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1bf89ae58050bbd32c7307199046117feee245c2fd9ab6255c7308522b7ca149";
+    hash = "sha256-G/ia5YBQu9MscwcZkEYRf+7iRcL9mrYlXHMIUit8oUk=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/i2csense/default.nix b/pkgs/development/python-modules/i2csense/default.nix
index b41dd6426652c..87e40b06a648f 100644
--- a/pkgs/development/python-modules/i2csense/default.nix
+++ b/pkgs/development/python-modules/i2csense/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "6f9c0a37d971e5b8a60c54982bd580cff84bf94fedc08c097e603a8e5609c33f";
+    hash = "sha256-b5wKN9lx5bimDFSYK9WAz/hL+U/twIwJfmA6jlYJwz8=";
   };
 
   propagatedBuildInputs = [ smbus-cffi ];
diff --git a/pkgs/development/python-modules/imagecodecs-lite/default.nix b/pkgs/development/python-modules/imagecodecs-lite/default.nix
index 149fb2539038a..3ab214935275e 100644
--- a/pkgs/development/python-modules/imagecodecs-lite/default.nix
+++ b/pkgs/development/python-modules/imagecodecs-lite/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0s4xb17qd7vimc46rafbjnibj4sf0lnv8cwl22k1h6zb7jhqmlcm";
+    hash = "sha256-ldGKoTzrGximEJQztC0FThO5opXLqWwIq3Gfhk9YnWg=";
   };
 
   nativeBuildInputs = [ cython ];
diff --git a/pkgs/development/python-modules/imagecorruptions/default.nix b/pkgs/development/python-modules/imagecorruptions/default.nix
index c55b05e98510e..2d07f25d3ec76 100644
--- a/pkgs/development/python-modules/imagecorruptions/default.nix
+++ b/pkgs/development/python-modules/imagecorruptions/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "044e173f24d5934899bdbf3596bfbec917e8083e507eed583ab217abebbe084d";
+    hash = "sha256-BE4XPyTVk0iZvb81lr++yRfoCD5Qfu1YOrIXq+u+CE0=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/imutils/default.nix b/pkgs/development/python-modules/imutils/default.nix
index 8a1ec92d2d430..1b479cc3ec5bf 100644
--- a/pkgs/development/python-modules/imutils/default.nix
+++ b/pkgs/development/python-modules/imutils/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "03827a9fca8b5c540305c0844a62591cf35a0caec199cb0f2f0a4a0fb15d8f24";
+    hash = "sha256-A4J6n8qLXFQDBcCESmJZHPNaDK7BmcsPLwpKD7FdjyQ=";
   };
 
   propagatedBuildInputs = [ opencv4 ];
diff --git a/pkgs/development/python-modules/infinity/default.nix b/pkgs/development/python-modules/infinity/default.nix
index e9ec298c3088d..b8bf010372f68 100644
--- a/pkgs/development/python-modules/infinity/default.nix
+++ b/pkgs/development/python-modules/infinity/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1npcc4adcc3c9diw4kgmd5c0ikym1iz364p2zp6gs011rqaprald";
+    hash = "sha256-jap8Fc4hAP3M/eISM34M1c8IWGn1TcJjS2ww1hRh7No=";
   };
 
   nativeCheckInputs = [
diff --git a/pkgs/development/python-modules/inflection/default.nix b/pkgs/development/python-modules/inflection/default.nix
index a4b0b46ffb4ae..4080d9d280313 100644
--- a/pkgs/development/python-modules/inflection/default.nix
+++ b/pkgs/development/python-modules/inflection/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1a29730d366e996aaacffb2f1f1cb9593dc38e2ddd30c91250c6dde09ea9b417";
+    hash = "sha256-GilzDTZumWqqz/svHxy5WT3Dji3dMMkSUMbd4J6ptBc=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/inifile/default.nix b/pkgs/development/python-modules/inifile/default.nix
index 98e06c3108e0f..0e404f9d5daca 100644
--- a/pkgs/development/python-modules/inifile/default.nix
+++ b/pkgs/development/python-modules/inifile/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "d9e5eb4708ebf13353c4cfce798ad47890a8bcc5fbae04630223d15d79f55e96";
+    hash = "sha256-2eXrRwjr8TNTxM/OeYrUeJCovMX7rgRjAiPRXXn1XpY=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/iniparse/default.nix b/pkgs/development/python-modules/iniparse/default.nix
index 36efa67614494..ca7676e826fd6 100644
--- a/pkgs/development/python-modules/iniparse/default.nix
+++ b/pkgs/development/python-modules/iniparse/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "932e5239d526e7acb504017bb707be67019ac428a6932368e6851691093aa842";
+    hash = "sha256-ky5SOdUm56y1BAF7twe+ZwGaxCimkyNo5oUWkQk6qEI=";
   };
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/insegel/default.nix b/pkgs/development/python-modules/insegel/default.nix
index 3100128f5ecc6..196854b888fba 100644
--- a/pkgs/development/python-modules/insegel/default.nix
+++ b/pkgs/development/python-modules/insegel/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1d055dd64f6eb335580a485271511ba2f4e3b5e315f48f827f58da3cace4b4ae";
+    hash = "sha256-HQVd1k9uszVYCkhScVEbovTjteMV9I+Cf1jaPKzktK4=";
   };
 
   propagatedBuildInputs = [ pygments ];
diff --git a/pkgs/development/python-modules/interruptingcow/default.nix b/pkgs/development/python-modules/interruptingcow/default.nix
index 4f8cfe01985a7..acb943c58880e 100644
--- a/pkgs/development/python-modules/interruptingcow/default.nix
+++ b/pkgs/development/python-modules/interruptingcow/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "3e8cd5058b651e625702cba53e3b1fb76d7a5ec07ab69c52a167a9f784e3306c";
+    hash = "sha256-PozVBYtlHmJXAsulPjsft216XsB6tpxSoWep94TjMGw=";
   };
 
   build-system = [
diff --git a/pkgs/development/python-modules/iocapture/default.nix b/pkgs/development/python-modules/iocapture/default.nix
index c7a00b3f420a0..da73299355843 100644
--- a/pkgs/development/python-modules/iocapture/default.nix
+++ b/pkgs/development/python-modules/iocapture/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "86670e1808bcdcd4f70112f43da72ae766f04cd8311d1071ce6e0e0a72e37ee8";
+    hash = "sha256-hmcOGAi83NT3ARL0Pacq52bwTNgxHRBxzm4OCnLjfug=";
   };
 
   nativeCheckInputs = [
diff --git a/pkgs/development/python-modules/iowait/default.nix b/pkgs/development/python-modules/iowait/default.nix
index d5be45de2e263..fd09b8ca7d092 100644
--- a/pkgs/development/python-modules/iowait/default.nix
+++ b/pkgs/development/python-modules/iowait/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "16djvxd9sxm7cr57clhqkyrq3xvdzgwj803sy5hwyb62hkmw46xb";
+    hash = "sha256-qxvC64TCLM9h8XoAJPn7bfeBs58YUnZKZqd2nVrfspk=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/ipaddr/default.nix b/pkgs/development/python-modules/ipaddr/default.nix
index 5f8c0efaa8b82..68a257021c5ad 100644
--- a/pkgs/development/python-modules/ipaddr/default.nix
+++ b/pkgs/development/python-modules/ipaddr/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1ml8r8z3f0mnn381qs1snbffa920i9ycp6mm2am1d3aqczkdz4j0";
+    hash = "sha256-QJLf5mdYjRaqErWay3yKQCTl3LI6aBzQsLYCNz7KiNY=";
   };
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/iso-639/default.nix b/pkgs/development/python-modules/iso-639/default.nix
index f40aadb9ef258..6f4b46a2f54ec 100644
--- a/pkgs/development/python-modules/iso-639/default.nix
+++ b/pkgs/development/python-modules/iso-639/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "dc9cd4b880b898d774c47fe9775167404af8a85dd889d58f9008035109acce49";
+    hash = "sha256-3JzUuIC4mNd0xH/pd1FnQEr4qF3YidWPkAgDUQmszkk=";
   };
 
   propagatedBuildInputs = [ setuptools ];
diff --git a/pkgs/development/python-modules/iwlib/default.nix b/pkgs/development/python-modules/iwlib/default.nix
index 774845f67bf24..2c8b04f9b37b2 100644
--- a/pkgs/development/python-modules/iwlib/default.nix
+++ b/pkgs/development/python-modules/iwlib/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "a805f6597a70ee3001aba8f039fb7b2dcb75dc15c4e7852f5594fd6379196da1";
+    hash = "sha256-qAX2WXpw7jABq6jwOft7Lct13BXE54UvVZT9Y3kZbaE=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/jaydebeapi/default.nix b/pkgs/development/python-modules/jaydebeapi/default.nix
index a8f1b072c9ee5..daef2cf46196c 100644
--- a/pkgs/development/python-modules/jaydebeapi/default.nix
+++ b/pkgs/development/python-modules/jaydebeapi/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "JayDeBeApi";
     inherit version;
-    sha256 = "f25e9307fbb5960cb035394c26e37731b64cc465b197c4344cee85ec450ab92f";
+    hash = "sha256-8l6TB/u1lgywNTlMJuN3MbZMxGWxl8Q0TO6F7EUKuS8=";
   };
 
   propagatedBuildInputs = [ jpype1 ];
diff --git a/pkgs/development/python-modules/jdcal/default.nix b/pkgs/development/python-modules/jdcal/default.nix
index 7303d46384de6..7b894504a9f15 100644
--- a/pkgs/development/python-modules/jdcal/default.nix
+++ b/pkgs/development/python-modules/jdcal/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "472872e096eb8df219c23f2689fc336668bdb43d194094b5cc1707e1640acfc8";
+    hash = "sha256-Ryhy4JbrjfIZwj8mifwzZmi9tD0ZQJS1zBcH4WQKz8g=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/jinja2-time/default.nix b/pkgs/development/python-modules/jinja2-time/default.nix
index 397fe292664c1..fb4e0ec29808f 100644
--- a/pkgs/development/python-modules/jinja2-time/default.nix
+++ b/pkgs/development/python-modules/jinja2-time/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0h0dr7cfpjnjj8bgl2vk9063a53649pn37wnlkd8hxjy656slkni";
+    hash = "sha256-0U6qTTFedojapJafYW8iZhQ1DEhzC/oWktLK69jJDUA=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/jschema-to-python/default.nix b/pkgs/development/python-modules/jschema-to-python/default.nix
index 8d4d02de48c0d..b00a33c142eb9 100644
--- a/pkgs/development/python-modules/jschema-to-python/default.nix
+++ b/pkgs/development/python-modules/jschema-to-python/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "jschema_to_python";
     inherit version;
-    sha256 = "76ff14fe5d304708ccad1284e4b11f96a658949a31ee7faed9e0995279549b91";
+    hash = "sha256-dv8U/l0wRwjMrRKE5LEflqZYlJox7n+u2eCZUnlUm5E=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/jsmin/default.nix b/pkgs/development/python-modules/jsmin/default.nix
index 1525888ac7930..edc1ad945f289 100644
--- a/pkgs/development/python-modules/jsmin/default.nix
+++ b/pkgs/development/python-modules/jsmin/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "c0959a121ef94542e807a674142606f7e90214a2b3d1eb17300244bbb5cc2bfc";
+    hash = "sha256-wJWaEh75RULoB6Z0FCYG9+kCFKKz0esXMAJEu7XMK/w=";
   };
 
   nativeCheckInputs = [ pytestCheckHook ];
diff --git a/pkgs/development/python-modules/jsonpath-rw/default.nix b/pkgs/development/python-modules/jsonpath-rw/default.nix
index bfcdf597ae679..15590f7a6e0ba 100644
--- a/pkgs/development/python-modules/jsonpath-rw/default.nix
+++ b/pkgs/development/python-modules/jsonpath-rw/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "05c471281c45ae113f6103d1268ec7a4831a2e96aa80de45edc89b11fac4fbec";
+    hash = "sha256-BcRxKBxFrhE/YQPRJo7HpIMaLpaqgN5F7cibEfrE++w=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/jupyter-c-kernel/default.nix b/pkgs/development/python-modules/jupyter-c-kernel/default.nix
index 1318f265992ad..3b8f37d3e561f 100644
--- a/pkgs/development/python-modules/jupyter-c-kernel/default.nix
+++ b/pkgs/development/python-modules/jupyter-c-kernel/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "jupyter_c_kernel";
     inherit version;
-    sha256 = "e4b34235b42761cfc3ff08386675b2362e5a97fb926c135eee782661db08a140";
+    hash = "sha256-5LNCNbQnYc/D/wg4ZnWyNi5al/uSbBNe7ngmYdsIoUA=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/jxmlease/default.nix b/pkgs/development/python-modules/jxmlease/default.nix
index 8f7cf07d496d8..84b875707fe0b 100644
--- a/pkgs/development/python-modules/jxmlease/default.nix
+++ b/pkgs/development/python-modules/jxmlease/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "17l3w3ak07p72s8kv8hg0ilxs0kkxjn7bfwnl3g2cw58v1siab31";
+    hash = "sha256-YSwVddiocCbeoJa7dazscwLdaQQPoj2RFuceMNXgg54=";
   };
 
   propagatedBuildInputs = [ lxml ];
diff --git a/pkgs/development/python-modules/kaa-base/default.nix b/pkgs/development/python-modules/kaa-base/default.nix
index 8796adcc56c6d..121cf0910926c 100644
--- a/pkgs/development/python-modules/kaa-base/default.nix
+++ b/pkgs/development/python-modules/kaa-base/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0k3zzz84wzz9q1fl3vvqr2ys96z9pcf4viq9q6s2a63zaysmcfd2";
+    hash = "sha256-ojlWtVd/GCW0wQnHTRy76Zukvch470FdwOl/TtD/f0w=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/kaa-metadata/default.nix b/pkgs/development/python-modules/kaa-metadata/default.nix
index 5d73914528603..ed541dad01185 100644
--- a/pkgs/development/python-modules/kaa-metadata/default.nix
+++ b/pkgs/development/python-modules/kaa-metadata/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0bkbzfgxvmby8lvzkqjp86anxvv3vjd9nksv2g4l7shsk1n7y27a";
+    hash = "sha256-6gh/bJga6kPJE1tPm5rcY+9ulUFX4vk3RX7V3Z/7ay4=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/kconfiglib/default.nix b/pkgs/development/python-modules/kconfiglib/default.nix
index 2ed4d2554e6c2..55548e4bd7b32 100644
--- a/pkgs/development/python-modules/kconfiglib/default.nix
+++ b/pkgs/development/python-modules/kconfiglib/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0g690bk789hsry34y4ahvly5c8w8imca90ss4njfqf7m2qicrlmy";
+    hash = "sha256-vtLMIhb1OOykJVqDpFiNiCNWPN1QEU+GzxomdOYCyTw=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/kerberos/default.nix b/pkgs/development/python-modules/kerberos/default.nix
index 2bfa064a16c43..0c0f9f89d99ed 100644
--- a/pkgs/development/python-modules/kerberos/default.nix
+++ b/pkgs/development/python-modules/kerberos/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "cdd046142a4e0060f96a00eb13d82a5d9ebc0f2d7934393ed559bac773460a2c";
+    hash = "sha256-zdBGFCpOAGD5agDrE9gqXZ68Dy15NDk+1Vm6x3NGCiw=";
   };
 
   nativeBuildInputs = [ libkrb5 ];
diff --git a/pkgs/development/python-modules/keystone-engine/default.nix b/pkgs/development/python-modules/keystone-engine/default.nix
index 45dacca71297b..29001fd86e70a 100644
--- a/pkgs/development/python-modules/keystone-engine/default.nix
+++ b/pkgs/development/python-modules/keystone-engine/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "1xahdr6bh3dw5swrc2r8kqa8ljhqlb7k2kxv5mrw5rhcmcnzcyig";
+    hash = "sha256-L3r2LasM5sJzLbtPMc+iGEqKFJ4oC5a5LrwNuExuUPU=";
   };
 
   build-system = [
diff --git a/pkgs/development/python-modules/langdetect/default.nix b/pkgs/development/python-modules/langdetect/default.nix
index 46e0e3fdd4627..249a3ebc439bb 100644
--- a/pkgs/development/python-modules/langdetect/default.nix
+++ b/pkgs/development/python-modules/langdetect/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1805svvb7xjm4sf1j7b6nc3409x37pd1xmabfwwjf1ldkzwgxhfb";
+    hash = "sha256-y8H++J+NBic5d0vVHto9oydABrNmHRmcJlX2s/bWBaA=";
   };
 
   propagatedBuildInputs = [ six ];
diff --git a/pkgs/development/python-modules/leveldb/default.nix b/pkgs/development/python-modules/leveldb/default.nix
index fd37ed3dcc0cb..3f97225edd9f4 100644
--- a/pkgs/development/python-modules/leveldb/default.nix
+++ b/pkgs/development/python-modules/leveldb/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1cffe776842917e09f073bd6ea5856c64136aebddbe51bd17ea29913472fecbf";
+    hash = "sha256-HP/ndoQpF+CfBzvW6lhWxkE2rr3b5RvRfqKZE0cv7L8=";
   };
 
   nativeBuildInputs = [ setuptools ];
diff --git a/pkgs/development/python-modules/lexid/default.nix b/pkgs/development/python-modules/lexid/default.nix
index 161ac4e7e02ff..c2239d2355f5d 100644
--- a/pkgs/development/python-modules/lexid/default.nix
+++ b/pkgs/development/python-modules/lexid/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   format = "setuptools";
   src = fetchPypi {
     inherit pname version;
-    sha256 = "509a3a4cc926d3dbf22b203b18a4c66c25e6473fb7c0e0d30374533ac28bafe5";
+    hash = "sha256-UJo6TMkm09vyKyA7GKTGbCXmRz+3wODTA3RTOsKLr+U=";
   };
 
   prePatch = ''
diff --git a/pkgs/development/python-modules/libkeepass/default.nix b/pkgs/development/python-modules/libkeepass/default.nix
index 6d65cbcf6e2f7..b60d86974e37b 100644
--- a/pkgs/development/python-modules/libkeepass/default.nix
+++ b/pkgs/development/python-modules/libkeepass/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0pwg7n9xqcjia1qmz6g48h5s31slh3mxmcqag73gq4zhl4xb6bai";
+    hash = "sha256-US2zOqHwE/zGeQqz2uuAVIehC0TkmV9xUFEy3JM9j18=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/liblzfse/default.nix b/pkgs/development/python-modules/liblzfse/default.nix
index 3051713bfc804..6c08acce5af02 100644
--- a/pkgs/development/python-modules/liblzfse/default.nix
+++ b/pkgs/development/python-modules/liblzfse/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "bb0b899b3830c02fdf3dbde48ea59611833f366fef836e5c32cf8145134b7d3d";
+    hash = "sha256-uwuJmzgwwC/fPb3kjqWWEYM/Nm/vg25cMs+BRRNLfT0=";
   };
 
   preBuild = ''
diff --git a/pkgs/development/python-modules/libmr/default.nix b/pkgs/development/python-modules/libmr/default.nix
index 83a29565ba889..15d5a62eedd86 100644
--- a/pkgs/development/python-modules/libmr/default.nix
+++ b/pkgs/development/python-modules/libmr/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "43ccd86693b725fa3abe648c8cdcef17ba5fa46b5528168829e5f9b968dfeb70";
+    hash = "sha256-Q8zYZpO3Jfo6vmSMjNzvF7pfpGtVKBaIKeX5uWjf63A=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/libpurecool/default.nix b/pkgs/development/python-modules/libpurecool/default.nix
index 651c5bc01ebcb..2c4777d1e1d5d 100644
--- a/pkgs/development/python-modules/libpurecool/default.nix
+++ b/pkgs/development/python-modules/libpurecool/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1kwbinbg0i4fca1bpx6jwa1fiw71vg0xa89jhq4pmnl5cn9c8kqx";
+    hash = "sha256-HU/EkmWF2noJhjIh1cHb4fDoguLS9LuCYo5E8JaNi88=";
   };
 
   # Remove vendorized zeroconf, https://github.com/etheralm/libpurecool/issues/33
diff --git a/pkgs/development/python-modules/limitlessled/default.nix b/pkgs/development/python-modules/limitlessled/default.nix
index 08015669fb34c..29d0ba1e50301 100644
--- a/pkgs/development/python-modules/limitlessled/default.nix
+++ b/pkgs/development/python-modules/limitlessled/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0pd71wxqjvznx10brsj1sgy3420bz7awbzk9jlj422rrdxql754j";
+    hash = "sha256-kpRDcW85C0EklWn+xdX5Cwgy/NNB6rxA6PZviTsPp10=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/linecache2/default.nix b/pkgs/development/python-modules/linecache2/default.nix
index 64d45ab14422d..a9ea23e38e45d 100644
--- a/pkgs/development/python-modules/linecache2/default.nix
+++ b/pkgs/development/python-modules/linecache2/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0z79g3ds5wk2lvnqw0y2jpakjf32h95bd9zmnvp7dnqhf57gy9jb";
+    hash = "sha256-Syb/TnEQ23butvWntkqCYjg51ZXCA47tpmLyott46Xw=";
   };
 
   buildInputs = [ pbr ];
diff --git a/pkgs/development/python-modules/linode/default.nix b/pkgs/development/python-modules/linode/default.nix
index 58fffef62924a..bff52c7f74466 100644
--- a/pkgs/development/python-modules/linode/default.nix
+++ b/pkgs/development/python-modules/linode/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "db3c2a7fab8966d903a63f16c515bff241533e4ef2d746aa7aae4a49bba5e573";
+    hash = "sha256-2zwqf6uJZtkDpj8WxRW/8kFTPk7y10aqeq5KSbul5XM=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/linuxfd/default.nix b/pkgs/development/python-modules/linuxfd/default.nix
index 38ca284285be0..1f25c540fa3c2 100644
--- a/pkgs/development/python-modules/linuxfd/default.nix
+++ b/pkgs/development/python-modules/linuxfd/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b8c00109724b68e093f9b556edd78e41ed65fb8d969fd0e83186a97b5d3139b4";
+    hash = "sha256-uMABCXJLaOCT+bVW7deOQe1l+42Wn9DoMYape10xObQ=";
   };
 
   # no tests
diff --git a/pkgs/development/python-modules/logzero/default.nix b/pkgs/development/python-modules/logzero/default.nix
index 3cf5a2e8e05bb..e223742369228 100644
--- a/pkgs/development/python-modules/logzero/default.nix
+++ b/pkgs/development/python-modules/logzero/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "7f73ddd3ae393457236f081ffebd044a3aa2e423a47ae6ddb5179ab90d0ad082";
+    hash = "sha256-f3Pd0645NFcjbwgf/r0ESjqi5COkeubdtReauQ0K0II=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/lrcalc-python/default.nix b/pkgs/development/python-modules/lrcalc-python/default.nix
index 448e07d8e2fd4..73a0a68082b97 100644
--- a/pkgs/development/python-modules/lrcalc-python/default.nix
+++ b/pkgs/development/python-modules/lrcalc-python/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "lrcalc";
-    sha256 = "e3a0509aeda487b412b391a52e817ca36b5c063a8305e09fd54d53259dd6aaa9";
+    hash = "sha256-46BQmu2kh7QSs5GlLoF8o2tcBjqDBeCf1U1TJZ3Wqqk=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/development/python-modules/ltpycld2/default.nix b/pkgs/development/python-modules/ltpycld2/default.nix
index 35063a66a5bee..2d78952d0acdc 100644
--- a/pkgs/development/python-modules/ltpycld2/default.nix
+++ b/pkgs/development/python-modules/ltpycld2/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "LTpycld2";
     inherit version;
-    sha256 = "948d0c1ab5518ab4efcbcc3cd73bb29f809f1dfb30f4d2fbd81b175a1ffeb516";
+    hash = "sha256-lI0MGrVRirTvy8w81zuyn4CfHfsw9NL72BsXWh/+tRY=";
   };
 
   doCheck = false; # completely broken tests
diff --git a/pkgs/development/python-modules/mailcap-fix/default.nix b/pkgs/development/python-modules/mailcap-fix/default.nix
index dbad311633e9e..aa465ca44a827 100644
--- a/pkgs/development/python-modules/mailcap-fix/default.nix
+++ b/pkgs/development/python-modules/mailcap-fix/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "02lijkq6v379r8zkqg9q2srin3i80m4wvwik3hcbih0s14v0ng0i";
+    hash = "sha256-ETwLNgkawLgYHDPyzUkFKA4bsxY4PTw/yumMbfCUkQo=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/mailchimp/default.nix b/pkgs/development/python-modules/mailchimp/default.nix
index ba1c503193dc7..5d9792f639f49 100644
--- a/pkgs/development/python-modules/mailchimp/default.nix
+++ b/pkgs/development/python-modules/mailchimp/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "5227999904233a7d2e9ce5eac5225b9a5fac0318ae5107e3ed09c8bf89286768";
+    hash = "sha256-UieZmQQjOn0unOXqxSJbml+sAxiuUQfj7QnIv4koZ2g=";
   };
 
   buildInputs = [ docopt ];
diff --git a/pkgs/development/python-modules/marionette-harness/manifestparser.nix b/pkgs/development/python-modules/marionette-harness/manifestparser.nix
index e43995df4fd54..4fcb86ae6585a 100644
--- a/pkgs/development/python-modules/marionette-harness/manifestparser.nix
+++ b/pkgs/development/python-modules/marionette-harness/manifestparser.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "06cnj682ynacwpi63k1427vbf7ydnwh3dchc4b11yw8ii25wbc5d";
+    hash = "sha256-rbDFi4gRcR/CIgyyNiC3zR+39hEkzGHi5UxZL5CRlhk=";
   };
 
   propagatedBuildInputs = [ ];
diff --git a/pkgs/development/python-modules/markdown-macros/default.nix b/pkgs/development/python-modules/markdown-macros/default.nix
index 685151184f348..d3768916c9bf6 100644
--- a/pkgs/development/python-modules/markdown-macros/default.nix
+++ b/pkgs/development/python-modules/markdown-macros/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1lzvrb7nci22yp21ab2qqc9p0fhkazqj29vw0wln2r4ckb2nbawv";
+    hash = "sha256-m6tlxZqMZGEpB3wnIfFXEzpwE8NYLBXE9UJEZs/K+9M=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/mattermostdriver/default.nix b/pkgs/development/python-modules/mattermostdriver/default.nix
index 82b458e87809a..3636e09a2e35e 100644
--- a/pkgs/development/python-modules/mattermostdriver/default.nix
+++ b/pkgs/development/python-modules/mattermostdriver/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2e4d7b4a17d3013e279c6f993746ea18cd60b45d8fa3be24f47bc2de22b9b3b4";
+    hash = "sha256-Lk17ShfTAT4nnG+ZN0bqGM1gtF2Po74k9HvC3iK5s7Q=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/mergedb/default.nix b/pkgs/development/python-modules/mergedb/default.nix
index 9ec57d783e65c..242ae07fe6aac 100644
--- a/pkgs/development/python-modules/mergedb/default.nix
+++ b/pkgs/development/python-modules/mergedb/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2034c18dca23456c5b166b63d94300bcd8ec9f386e6cd639c2f66e141c0313f9";
+    hash = "sha256-IDTBjcojRWxbFmtj2UMAvNjsnzhubNY5wvZuFBwDE/k=";
   };
 
   nativeBuildInputs = [ setuptools-scm ];
diff --git a/pkgs/development/python-modules/meshlabxml/default.nix b/pkgs/development/python-modules/meshlabxml/default.nix
index 9e9a6025390c2..a96eebad0116b 100644
--- a/pkgs/development/python-modules/meshlabxml/default.nix
+++ b/pkgs/development/python-modules/meshlabxml/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "MeshLabXML";
     inherit version;
-    sha256 = "1villmg46hqby5jjkkpxr5bxydr72y5b3cbfngwpyxxdljn091w8";
+    hash = "sha256-iIcErKStd3/5s26xsYoXJzffV8n9zill8QtDQ16lNO4=";
   };
 
   propagatedBuildInputs = [ ];
diff --git a/pkgs/development/python-modules/midiutil/default.nix b/pkgs/development/python-modules/midiutil/default.nix
index 1ea3b74e569dd..02fb68e62f8f9 100644
--- a/pkgs/development/python-modules/midiutil/default.nix
+++ b/pkgs/development/python-modules/midiutil/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "MIDIUtil";
     inherit version;
-    sha256 = "02m9sqv36zrzgz5zg2w9qmz8snzlm27yg3ways2hgipgs4xriykr";
+    hash = "sha256-efqYO9HvxgeF9oqP54+o9FuNfsWJi/fLfz9/MzbWqQo=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/milksnake/default.nix b/pkgs/development/python-modules/milksnake/default.nix
index f1d58a12b3e41..3aa6945fef369 100644
--- a/pkgs/development/python-modules/milksnake/default.nix
+++ b/pkgs/development/python-modules/milksnake/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "120nprd8lqis7x7zy72536gk2j68f7gxm8gffmx8k4ygifvl7kfz";
+    hash = "sha256-381Dt4vPk4l6de6h2t9xyEgxnxlFHP9PPzpiilq+Fog=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/mongodict/default.nix b/pkgs/development/python-modules/mongodict/default.nix
index ab8c181be3437..bec376099924d 100644
--- a/pkgs/development/python-modules/mongodict/default.nix
+++ b/pkgs/development/python-modules/mongodict/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0nv5amfs337m0gbxpjb0585s20rndqfc3mfrzq1iwgnds5gxcrlw";
+    hash = "sha256-nGbWX9HNPh4D/tnVwRxuNgOhCypgydvXA/WMoV1VZVs=";
   };
 
   propagatedBuildInputs = [ pymongo ];
diff --git a/pkgs/development/python-modules/monkeyhex/default.nix b/pkgs/development/python-modules/monkeyhex/default.nix
index 7c46c59609cde..f47caa3d9ea0b 100644
--- a/pkgs/development/python-modules/monkeyhex/default.nix
+++ b/pkgs/development/python-modules/monkeyhex/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "a646096dd3114ee8a7c6f30363f38c288ec56c4e032c8fc7e681792b604dd122";
+    hash = "sha256-pkYJbdMRTuinxvMDY/OMKI7FbE4DLI/H5oF5K2BN0SI=";
   };
 
   propagatedBuildInputs = [ future ];
diff --git a/pkgs/development/python-modules/monotonic/default.nix b/pkgs/development/python-modules/monotonic/default.nix
index fdd4cd03ca44f..c9abbc9656a66 100644
--- a/pkgs/development/python-modules/monotonic/default.nix
+++ b/pkgs/development/python-modules/monotonic/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "3a55207bcfed53ddd5c5bae174524062935efed17792e9de2ad0205ce9ad63f7";
+    hash = "sha256-OlUge8/tU93VxbrhdFJAYpNe/tF3kuneKtAgXOmtY/c=";
   };
 
   __propagatedImpureHostDeps = lib.optional stdenv.hostPlatform.isDarwin "/usr/lib/libc.dylib";
diff --git a/pkgs/development/python-modules/morfessor/default.nix b/pkgs/development/python-modules/morfessor/default.nix
index 0fda02a714f46..891984befc8e3 100644
--- a/pkgs/development/python-modules/morfessor/default.nix
+++ b/pkgs/development/python-modules/morfessor/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "Morfessor";
     inherit version;
-    sha256 = "bb3beac234341724c5f640f65803071f62373a50dba854d5a398567f9aefbab2";
+    hash = "sha256-uzvqwjQ0FyTF9kD2WAMHH2I3OlDbqFTVo5hWf5rvurI=";
   };
 
   build-system = [ setuptools_80 ];
diff --git a/pkgs/development/python-modules/mplleaflet/default.nix b/pkgs/development/python-modules/mplleaflet/default.nix
index b0c48b23892b2..ec50f36431b9b 100644
--- a/pkgs/development/python-modules/mplleaflet/default.nix
+++ b/pkgs/development/python-modules/mplleaflet/default.nix
@@ -21,7 +21,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "049e0b91797ce5b462853395138161fed9e8dfc1f4723f482ebb0739a0bbd289";
+    hash = "sha256-BJ4LkXl85bRihTOVE4Fh/tno38H0cj9ILrsHOaC70ok=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/mpyq/default.nix b/pkgs/development/python-modules/mpyq/default.nix
index cae321df5c0b4..4186cde13a1df 100644
--- a/pkgs/development/python-modules/mpyq/default.nix
+++ b/pkgs/development/python-modules/mpyq/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "01q0xh2fy3zzsrfr45d2ypj4whs7s060cy1rnprg6sg55fbgbaih";
+    hash = "sha256-MKr1livlafPytTl4BgzQR0NO5PWiFZJd1v8P7wTsAAc=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/mullvad-api/default.nix b/pkgs/development/python-modules/mullvad-api/default.nix
index 427746b9b17dc..2447eb3888c50 100644
--- a/pkgs/development/python-modules/mullvad-api/default.nix
+++ b/pkgs/development/python-modules/mullvad-api/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "mullvad_api";
     inherit version;
-    sha256 = "0r0hc2d6vky52hxdqxn37w0y42ddh1zal6zz2cvqlxamc53wbiv1";
+    hash = "sha256-YcfFR2FVdYo3E/8bqn6ArQniAT/Ddtw6FMXPbZpgEGQ=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/mulpyplexer/default.nix b/pkgs/development/python-modules/mulpyplexer/default.nix
index 0816313a567dd..c52fad8047f23 100644
--- a/pkgs/development/python-modules/mulpyplexer/default.nix
+++ b/pkgs/development/python-modules/mulpyplexer/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0c5xzci1djy1yi9hxxh8g67l6ms8r7ad7ja20pv8hfbdysdrwkhl";
+    hash = "sha256-FE6em/ZtOYj2BULJ09TJSFdDj3kI9g5T9MHLFiL7vTA=";
   };
 
   # Project has no tests
diff --git a/pkgs/development/python-modules/munkres/default.nix b/pkgs/development/python-modules/munkres/default.nix
index 2c6d7906378bb..45ef902b636ac 100644
--- a/pkgs/development/python-modules/munkres/default.nix
+++ b/pkgs/development/python-modules/munkres/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "fc44bf3c3979dada4b6b633ddeeb8ffbe8388ee9409e4d4e8310c2da1792db03";
+    hash = "sha256-/ES/PDl52tpLa2M93uuP++g4julAnk1OgxDC2heS2wM=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/musicbrainzngs/default.nix b/pkgs/development/python-modules/musicbrainzngs/default.nix
index bde6bd44e3962..b4b510ced34c5 100644
--- a/pkgs/development/python-modules/musicbrainzngs/default.nix
+++ b/pkgs/development/python-modules/musicbrainzngs/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "09z6k07pxncfgfc8clfmmxl2xqbd7h8x8bjzwr95hc0bzl00275b";
+    hash = "sha256-qxwBAP0LMFhS5l8u1BE8beEuaK/VUYaYe47Zfg+Y5ic=";
   };
 
   buildInputs = [ pkgs.glibcLocales ];
diff --git a/pkgs/development/python-modules/mutatormath/default.nix b/pkgs/development/python-modules/mutatormath/default.nix
index fd141dcda203e..1dd4a22fd7605 100644
--- a/pkgs/development/python-modules/mutatormath/default.nix
+++ b/pkgs/development/python-modules/mutatormath/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage (finalAttrs: {
   src = fetchPypi {
     pname = "MutatorMath";
     inherit (finalAttrs) version;
-    sha256 = "0r1qq45np49x14zz1zwkaayqrn7m8dn2jlipjldg2ihnmpzw29w1";
+    hash = "sha256-gSfB/60WRvEalTdSKWxD9diMvVKT//A/CT2RawvBOGQ=";
     extension = "zip";
   };
 
diff --git a/pkgs/development/python-modules/mutesync/default.nix b/pkgs/development/python-modules/mutesync/default.nix
index d90deaeacabc5..472c1ce837d13 100644
--- a/pkgs/development/python-modules/mutesync/default.nix
+++ b/pkgs/development/python-modules/mutesync/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage (finalAttrs: {
   src = fetchPypi {
     pname = "mutesync";
     inherit (finalAttrs) version;
-    sha256 = "1lz3q3q9lw8qxxb8jyrak77v6hkxwi39akyx96j8hd5jjaq2k5qc";
+    hash = "sha256-DJcpsJKyNIikSd1PlUbkfUKzz5kqe4lW7xhxmvDA49M=";
   };
 
   build-system = [
diff --git a/pkgs/development/python-modules/nbsmoke/default.nix b/pkgs/development/python-modules/nbsmoke/default.nix
index aae9e7d86427a..87c1bf82fd6dc 100644
--- a/pkgs/development/python-modules/nbsmoke/default.nix
+++ b/pkgs/development/python-modules/nbsmoke/default.nix
@@ -20,7 +20,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "8b55333e2face27bc7ff80c266c468ca5633947cb0697727348020dd445b0874";
+    hash = "sha256-i1UzPi+s4nvH/4DCZsRoylYzlHywaXcnNIAg3URbCHQ=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/nevow/default.nix b/pkgs/development/python-modules/nevow/default.nix
index 852863e1b7d98..990fe5e864254 100644
--- a/pkgs/development/python-modules/nevow/default.nix
+++ b/pkgs/development/python-modules/nevow/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "Nevow";
     inherit version;
-    sha256 = "afb6ba85a5351953578c018fcdb9dfbd62f29a8d46c58bc9652bc000a27223f3";
+    hash = "sha256-r7a6haU1GVNXjAGPzbnfvWLymo1GxYvJZSvAAKJyI/M=";
   };
 
   propagatedBuildInputs = [ twisted ];
diff --git a/pkgs/development/python-modules/niluclient/default.nix b/pkgs/development/python-modules/niluclient/default.nix
index c15cdd332200e..a6191824263ec 100644
--- a/pkgs/development/python-modules/niluclient/default.nix
+++ b/pkgs/development/python-modules/niluclient/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "11ymn0cr4lchrcnf2xxlgljw223gwln01gxwr7mcgf95yc4006iq";
+    hash = "sha256-OBoACPMlucfqyby/ACzlbwjBJX20d+Esy5BRkhmw1Yc=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/nixpkgs-pytools/default.nix b/pkgs/development/python-modules/nixpkgs-pytools/default.nix
index c3349704f60ec..a4c384956b273 100644
--- a/pkgs/development/python-modules/nixpkgs-pytools/default.nix
+++ b/pkgs/development/python-modules/nixpkgs-pytools/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "11skcbi1lf9qcv9j5ikifb4pakhbbygqpcmv3390j7gxsa85cn19";
+    hash = "sha256-KVhWkNL9HQnSGLuyi59fC051yXJxxiLTZjg5GuJiU4c=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/notedown/default.nix b/pkgs/development/python-modules/notedown/default.nix
index 72666397f044c..a17a6447a4a89 100644
--- a/pkgs/development/python-modules/notedown/default.nix
+++ b/pkgs/development/python-modules/notedown/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "36e033ebbbe5aca0fab031ffaf3611d5bc5c50237df68ff81bb95f8be353a1ee";
+    hash = "sha256-NuAz67vlrKD6sDH/rzYR1bxcUCN99o/4G7lfi+NToe4=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/notify-events/default.nix b/pkgs/development/python-modules/notify-events/default.nix
index 6a5d1a4bd07a3..95882883a3d8c 100644
--- a/pkgs/development/python-modules/notify-events/default.nix
+++ b/pkgs/development/python-modules/notify-events/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "notify_events";
     inherit version;
-    sha256 = "e63ba935c3300ff7f48cba115f7cb4474906e83c2e9b60b95a0881eb949701e7";
+    hash = "sha256-5jupNcMwD/f0jLoRX3y0R0kG6Dwum2C5WgiB65SXAec=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/notify2/default.nix b/pkgs/development/python-modules/notify2/default.nix
index b2e5c33faaa46..dad15f0fe1a8b 100644
--- a/pkgs/development/python-modules/notify2/default.nix
+++ b/pkgs/development/python-modules/notify2/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0z8rrv9rsg1r2qgh2dxj3dfj5xnki98kgi3w839kqby4a26i1yik";
+    hash = "sha256-M/oQjVDELzzTQHzEN1GK0/YiXRuyNwEfFjk8ndPOGX0=";
   };
 
   # Tests require Xorg and Dbus instance
diff --git a/pkgs/development/python-modules/npyscreen/default.nix b/pkgs/development/python-modules/npyscreen/default.nix
index 28031b113b4aa..0600b54909d8e 100644
--- a/pkgs/development/python-modules/npyscreen/default.nix
+++ b/pkgs/development/python-modules/npyscreen/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0vhjwn0dan3zmffvh80dxb4x67jysvvf1imp6pk4dsfslpwy0bk2";
+    hash = "sha256-Yi7g+aXa6UbmNbfG4PbWXh7TyeoNILidq39Y1YDlEm4=";
   };
 
   # Tests are outdated
diff --git a/pkgs/development/python-modules/ntplib/default.nix b/pkgs/development/python-modules/ntplib/default.nix
index 29844518e0202..4cb6fd47f9c11 100644
--- a/pkgs/development/python-modules/ntplib/default.nix
+++ b/pkgs/development/python-modules/ntplib/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "899d8fb5f8c2555213aea95efca02934c7343df6ace9d7628a5176b176906267";
+    hash = "sha256-iZ2PtfjCVVITrqle/KApNMc0Pfas6ddiilF2sXaQYmc=";
   };
 
   # Require networking
diff --git a/pkgs/development/python-modules/nulltype/default.nix b/pkgs/development/python-modules/nulltype/default.nix
index 9588940625e33..1fa10055818e0 100644
--- a/pkgs/development/python-modules/nulltype/default.nix
+++ b/pkgs/development/python-modules/nulltype/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "0wpjbsmm0c9ifg9y6cnfz49qq9pa5f99nnqp6wdlv42ymfr3rak4";
+    hash = "sha256-ZKo8sqtekE0bNxdbm5Ir6iaME/nOMuPTczExUKte8nI=";
   };
 
   nativeCheckInputs = [ pytestCheckHook ];
diff --git a/pkgs/development/python-modules/oauth2client/default.nix b/pkgs/development/python-modules/oauth2client/default.nix
index 1fa9918a4e20c..c1669638e317f 100644
--- a/pkgs/development/python-modules/oauth2client/default.nix
+++ b/pkgs/development/python-modules/oauth2client/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "d486741e451287f69568a4d26d70d9acd73a2bbfa275746c535b4209891cccc6";
+    hash = "sha256-1IZ0HkUSh/aVaKTSbXDZrNc6K7+idXRsU1tCCYkczMY=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/odfpy/default.nix b/pkgs/development/python-modules/odfpy/default.nix
index 9d063ebe463a0..f35adb0de4b00 100644
--- a/pkgs/development/python-modules/odfpy/default.nix
+++ b/pkgs/development/python-modules/odfpy/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1v1qqk9p12qla85yscq2g413l3qasn6yr4ncyc934465b5p6lxnv";
+    hash = "sha256-23ZqblnFEDIS88yS7I3VCg86AnkCM+0LUhSLcNPEOOw=";
   };
 
   propagatedBuildInputs = [ defusedxml ];
diff --git a/pkgs/development/python-modules/offtrac/default.nix b/pkgs/development/python-modules/offtrac/default.nix
index 667f797ef1085..689dd09a4eec1 100644
--- a/pkgs/development/python-modules/offtrac/default.nix
+++ b/pkgs/development/python-modules/offtrac/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "06vd010pa1z7lyfj1na30iqzffr4kzj2k2sba09spik7drlvvl56";
+    hash = "sha256-ptC9aW5nxqsTUEuLKeSfJDv3cQRD2SCdp+cHdUEAbRs=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/ofxparse/default.nix b/pkgs/development/python-modules/ofxparse/default.nix
index 3401313a215f2..e44c65f016046 100644
--- a/pkgs/development/python-modules/ofxparse/default.nix
+++ b/pkgs/development/python-modules/ofxparse/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "19y4sp5l9jqiqzzlbqdfiab42qx7d84n4xm4s7jfq397666vcyh5";
+    hash = "sha256-BXq2jTEnDezk0aR2Yglqp2NBloqu4UX/xxHLRMvVxKc=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/onetimepad/default.nix b/pkgs/development/python-modules/onetimepad/default.nix
index affa6182b7d70..977a5bc3d1ba6 100644
--- a/pkgs/development/python-modules/onetimepad/default.nix
+++ b/pkgs/development/python-modules/onetimepad/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1eaade76d8036e1cb79e944b75874bfe5ee4046a571c0724564e1721565c73fd";
+    hash = "sha256-HqredtgDbhy3npRLdYdL/l7kBGpXHAckVk4XIVZcc/0=";
   };
 
   # upstream has no tests
diff --git a/pkgs/development/python-modules/onkyo-eiscp/default.nix b/pkgs/development/python-modules/onkyo-eiscp/default.nix
index 18faff5bdc279..5e59a60a41d63 100644
--- a/pkgs/development/python-modules/onkyo-eiscp/default.nix
+++ b/pkgs/development/python-modules/onkyo-eiscp/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "761abb16c654a1136763b927d094174d41f282809e44ea32cd47e199dd79d9c9";
+    hash = "sha256-dhq7FsZUoRNnY7kn0JQXTUHygoCeROoyzUfhmd152ck=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/openidc-client/default.nix b/pkgs/development/python-modules/openidc-client/default.nix
index b5d05ab5b8945..fa99dfd28053e 100644
--- a/pkgs/development/python-modules/openidc-client/default.nix
+++ b/pkgs/development/python-modules/openidc-client/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "680e969cae18c30adbddd6a087ed09f6a296b4937b4c8bc69be813bdbbfa9847";
+    hash = "sha256-aA6WnK4Ywwrb3dagh+0J9qKWtJN7TIvGm+gTvbv6mEc=";
   };
   propagatedBuildInputs = [ requests ];
 
diff --git a/pkgs/development/python-modules/oset/default.nix b/pkgs/development/python-modules/oset/default.nix
index 9b0d93fd20adb..502d5a92ef8b2 100644
--- a/pkgs/development/python-modules/oset/default.nix
+++ b/pkgs/development/python-modules/oset/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "017rr1m72s2fh9bmz5vrvc5mshczgzisi5894v9zkvvfr7gdf7sc";
+    hash = "sha256-TB/X3slu7/nTJgmVqON/n0FdC9t5l19Xgk5ocWrI+QQ=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/overly/default.nix b/pkgs/development/python-modules/overly/default.nix
index 2c58410c81170..fd2ecbe0d26fd 100644
--- a/pkgs/development/python-modules/overly/default.nix
+++ b/pkgs/development/python-modules/overly/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "20a99526c7859acc859e87afd97b5c4916405e7477834f727b49210e478370cb";
+    hash = "sha256-IKmVJseFmsyFnoev2XtcSRZAXnR3g09ye0khDkeDcMs=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/packbits/default.nix b/pkgs/development/python-modules/packbits/default.nix
index e6e9cffceb8be..135f86a4891e6 100644
--- a/pkgs/development/python-modules/packbits/default.nix
+++ b/pkgs/development/python-modules/packbits/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "bc6b370bb34e04ac8cfa835e06c0484380affc6d593adb8009dd6c0f7bfff034";
+    hash = "sha256-vGs3C7NOBKyM+oNeBsBIQ4Cv/G1ZOtuACd1sD3v/8DQ=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/pandas-datareader/default.nix b/pkgs/development/python-modules/pandas-datareader/default.nix
index 08c97850568a0..c119044f09ccc 100644
--- a/pkgs/development/python-modules/pandas-datareader/default.nix
+++ b/pkgs/development/python-modules/pandas-datareader/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "9fc3c63d39bc0c10c2683f1c6d503ff625020383e38f6cbe14134826b454d5a6";
+    hash = "sha256-n8PGPTm8DBDCaD8cbVA/9iUCA4Pjj2y+FBNIJrRU1aY=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/pandoc-attributes/default.nix b/pkgs/development/python-modules/pandoc-attributes/default.nix
index 8322f38835308..3884619e7451c 100644
--- a/pkgs/development/python-modules/pandoc-attributes/default.nix
+++ b/pkgs/development/python-modules/pandoc-attributes/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "69221502dac74f5df1317011ce62c85a83eef5da3b71c63b1908e98224304a8c";
+    hash = "sha256-aSIVAtrHT13xMXARzmLIWoPu9do7ccY7GQjpgiQwSow=";
   };
 
   propagatedBuildInputs = [ pandocfilters ];
diff --git a/pkgs/development/python-modules/papis-python-rofi/default.nix b/pkgs/development/python-modules/papis-python-rofi/default.nix
index c23b6cffa2a44..57c0f35fc1bf4 100644
--- a/pkgs/development/python-modules/papis-python-rofi/default.nix
+++ b/pkgs/development/python-modules/papis-python-rofi/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "358e24f5fb0a86de6f15d5168753ad4cbb97e52b36b1bd7abbad4053aeb6f621";
+    hash = "sha256-NY4k9fsKht5vFdUWh1OtTLuX5Ss2sb16u61AU6629iE=";
   };
 
   # No tests existing
diff --git a/pkgs/development/python-modules/parsley/default.nix b/pkgs/development/python-modules/parsley/default.nix
index 1da008231b18a..64040b0034652 100644
--- a/pkgs/development/python-modules/parsley/default.nix
+++ b/pkgs/development/python-modules/parsley/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "Parsley";
     inherit version;
-    sha256 = "0hcd41bl07a8sx7nmx12p16xprnblc4phxkawwmmy78n8y6jfi4l";
+    hash = "sha256-lEQnjUcWHV8r52p2eAmjy+bbTbgi9GpP10gdQFcgjUE=";
   };
   # Tests fail although the package works just fine.  Unfortunately
   # the tests as run by the upstream CI server travis.org are broken.
diff --git a/pkgs/development/python-modules/pastel/default.nix b/pkgs/development/python-modules/pastel/default.nix
index 60ac6810eea64..2fc89c13295b1 100644
--- a/pkgs/development/python-modules/pastel/default.nix
+++ b/pkgs/development/python-modules/pastel/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "e6581ac04e973cac858828c6202c1e1e81fee1dc7de7683f3e1ffe0bfd8a573d";
+    hash = "sha256-5lgawE6XPKyFiCjGICweHoH+4dx952g/Ph/+C/2KVz0=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/pathtools/default.nix b/pkgs/development/python-modules/pathtools/default.nix
index a15226a69292d..c6e5bbfece64c 100644
--- a/pkgs/development/python-modules/pathtools/default.nix
+++ b/pkgs/development/python-modules/pathtools/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1h7iam33vwxk8bvslfj4qlsdprdnwf8bvzhqh3jq5frr391cadbw";
+    hash = "sha256-fDXFQho5u4LlgBj+vZDjtuXbNMVEOqr3QrPzPUZV8cA=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/pbkdf2/default.nix b/pkgs/development/python-modules/pbkdf2/default.nix
index f08ecedebfaf3..f6844b7a26a49 100644
--- a/pkgs/development/python-modules/pbkdf2/default.nix
+++ b/pkgs/development/python-modules/pbkdf2/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0yb99rl2mbsaamj571s1mf6vgniqh23v98k4632150hjkwv9fqxc";
+    hash = "sha256-rGOXNp8SghLEMGSitIeAONq3jatBh1NkVUqvKmhOaXk=";
   };
 
   # ImportError: No module named test
diff --git a/pkgs/development/python-modules/pdfkit/default.nix b/pkgs/development/python-modules/pdfkit/default.nix
index 13c20f2d8fd99..4e048bd18c6f7 100644
--- a/pkgs/development/python-modules/pdfkit/default.nix
+++ b/pkgs/development/python-modules/pdfkit/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "992f821e1e18fc8a0e701ecae24b51a2d598296a180caee0a24c0af181da02a9";
+    hash = "sha256-mS+CHh4Y/IoOcB7K4ktRotWYKWoYDK7gokwK8YHaAqk=";
   };
 
   # tests are not distributed
diff --git a/pkgs/development/python-modules/pdfrw/default.nix b/pkgs/development/python-modules/pdfrw/default.nix
index 9e23839d6dabc..9e548ee708811 100644
--- a/pkgs/development/python-modules/pdfrw/default.nix
+++ b/pkgs/development/python-modules/pdfrw/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1x1yp63lg3jxpg9igw8lh5rc51q353ifsa1bailb4qb51r54kh0d";
+    hash = "sha256-DcBJSg5lYbJoVCso7eIoA4fCcoEU8RfTu12OR4e5PvQ=";
   };
 
   # tests require the extra download of github.com/pmaupin/static_pdfs
diff --git a/pkgs/development/python-modules/pep8/default.nix b/pkgs/development/python-modules/pep8/default.nix
index 0154616fea390..4df0b3f0e63f5 100644
--- a/pkgs/development/python-modules/pep8/default.nix
+++ b/pkgs/development/python-modules/pep8/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "fe249b52e20498e59e0b5c5256aa52ee99fc295b26ec9eaa85776ffdb9fe6374";
+    hash = "sha256-/iSbUuIEmOWeC1xSVqpS7pn8KVsm7J6qhXdv/bn+Y3Q=";
   };
 
   # FAIL: test_checkers_testsuite (testsuite.test_all.Pep8TestCase)
diff --git a/pkgs/development/python-modules/peppercorn/default.nix b/pkgs/development/python-modules/peppercorn/default.nix
index a47eb71111ef8..c0f955271ea10 100644
--- a/pkgs/development/python-modules/peppercorn/default.nix
+++ b/pkgs/development/python-modules/peppercorn/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1ip4bfwcpwkq9hz2dai14k2cyabvwrnvcvrcmzxmqm04g8fnimwn";
+    hash = "sha256-ltdoHXoEVFz7ryxvtm3meynPxCQhqiY+THjyy7hb5MY=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/pexif/default.nix b/pkgs/development/python-modules/pexif/default.nix
index e5b1970b4fe3f..47b66e3d599e6 100644
--- a/pkgs/development/python-modules/pexif/default.nix
+++ b/pkgs/development/python-modules/pexif/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "45a3be037c7ba8b64bbfc48f3586402cc17de55bb9d7357ef2bc99954a18da3f";
+    hash = "sha256-RaO+A3x7qLZLv8SPNYZALMF95Vu51zV+8ryZlUoY2j8=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/pgpdump/default.nix b/pkgs/development/python-modules/pgpdump/default.nix
index e49def42fc4fc..58b540ed1f875 100644
--- a/pkgs/development/python-modules/pgpdump/default.nix
+++ b/pkgs/development/python-modules/pgpdump/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0s4nh8h7qsdj2yf29bspjs1zvxd4lcd11r6g11dp7fppgf2h0iqw";
+    hash = "sha256-HEcAhXv3unNbCM/kEBqjpPX9g5ZXryScF7JpfCCClmg=";
   };
 
   # Disabling check because of: https://github.com/toofishes/python-pgpdump/issues/18
diff --git a/pkgs/development/python-modules/phpserialize/default.nix b/pkgs/development/python-modules/phpserialize/default.nix
index 89e7c9d30b555..c5be37d136c96 100644
--- a/pkgs/development/python-modules/phpserialize/default.nix
+++ b/pkgs/development/python-modules/phpserialize/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "19qgkb9z4zjbjxlpwh2w6pxkz2j3iymnydi69jl0jg905lqjsrxz";
+    hash = "sha256-v2ctMS0gPQmoTCY2b6uPQ4o/+zVcQH5pl0t+8tOaD6c=";
   };
 
   # project does not have tests at the moment
diff --git a/pkgs/development/python-modules/pickleshare/default.nix b/pkgs/development/python-modules/pickleshare/default.nix
index 59ae4082f783b..2a7fbbbfc2108 100644
--- a/pkgs/development/python-modules/pickleshare/default.nix
+++ b/pkgs/development/python-modules/pickleshare/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "87683d47965c1da65cdacaf31c8441d12b8044cdec9aca500cd78fc2c683afca";
+    hash = "sha256-h2g9R5ZcHaZc2srzHIRB0SuARM3smspQDNePwsaDr8o=";
   };
 
   propagatedBuildInputs = [ path ];
diff --git a/pkgs/development/python-modules/pid/default.nix b/pkgs/development/python-modules/pid/default.nix
index 72a303014c9b4..cba4941f14f6a 100644
--- a/pkgs/development/python-modules/pid/default.nix
+++ b/pkgs/development/python-modules/pid/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0e33670e83f6a33ebb0822e43a609c3247178d4a375ff50a4689e266d853eb66";
+    hash = "sha256-DjNnDoP2oz67CCLkOmCcMkcXjUo3X/UKRoniZthT62Y=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/pika-pool/default.nix b/pkgs/development/python-modules/pika-pool/default.nix
index 9292a70487a21..24f050a29bc21 100644
--- a/pkgs/development/python-modules/pika-pool/default.nix
+++ b/pkgs/development/python-modules/pika-pool/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f3985888cc2788cdbd293a68a8b5702a9c955db6f7b8b551aeac91e7f32da397";
+    hash = "sha256-85hYiMwniM29KTpoqLVwKpyVXbb3uLVRrqyR5/Mto5c=";
   };
 
   pythonRelaxDeps = [ "pika" ];
diff --git a/pkgs/development/python-modules/pillowfight/default.nix b/pkgs/development/python-modules/pillowfight/default.nix
index 14c705e018084..758d7bea6e343 100644
--- a/pkgs/development/python-modules/pillowfight/default.nix
+++ b/pkgs/development/python-modules/pillowfight/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "4923f4d1e78be15f19f03a608fb34ba9cb71bf5205de3c9fe7461c49078167a7";
+    hash = "sha256-SSP00eeL4V8Z8Dpgj7NLqctxv1IF3jyf50YcSQeBZ6c=";
   };
 
   propagatedBuildInputs = [ pillow ];
diff --git a/pkgs/development/python-modules/pixcat/default.nix b/pkgs/development/python-modules/pixcat/default.nix
index e2c23e5bcb335..89a37ca5fb04c 100644
--- a/pkgs/development/python-modules/pixcat/default.nix
+++ b/pkgs/development/python-modules/pixcat/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "657c8fe04513caecccd6086b347aa4b85db6b4c0f761b162cb9cd789abe7abb6";
+    hash = "sha256-ZXyP4EUTyuzM1ghrNHqkuF22tMD3YbFiy5zXiavnq7Y=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/plugnplay/default.nix b/pkgs/development/python-modules/plugnplay/default.nix
index 2cc1c6a6c09dc..92fb3383d498b 100644
--- a/pkgs/development/python-modules/plugnplay/default.nix
+++ b/pkgs/development/python-modules/plugnplay/default.nix
@@ -10,7 +10,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "877e2d2500a45aaf31e5175f9f46182088d3e2d64c1c6b9ff6c778ae0ee594c8";
+    hash = "sha256-h34tJQCkWq8x5Rdfn0YYIIjT4tZMHGuf9sd4rg7llMg=";
   };
 
   # no tests
diff --git a/pkgs/development/python-modules/ply/default.nix b/pkgs/development/python-modules/ply/default.nix
index e4a4118bb53f8..d202a27594a95 100644
--- a/pkgs/development/python-modules/ply/default.nix
+++ b/pkgs/development/python-modules/ply/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "00c7c1aaa88358b9c765b6d3000c6eec0ba42abca5351b095321aef446081da3";
+    hash = "sha256-AMfBqqiDWLnHZbbTAAxu7AukKrylNRsJUyGu9EYIHaM=";
   };
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/plyplus/default.nix b/pkgs/development/python-modules/plyplus/default.nix
index d41f45b528cb4..6981af01ea747 100644
--- a/pkgs/development/python-modules/plyplus/default.nix
+++ b/pkgs/development/python-modules/plyplus/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PlyPlus";
     inherit version;
-    sha256 = "0g3flgfm3jpb2d8v9z0qmbwca5gxdqr10cs3zvlfhv5cs06ahpnp";
+    hash = "sha256-116oDNCsbOjo/kMzEDJu/RXF+KoY/LRRE+vKUd2jbjw=";
   };
 
   propagatedBuildInputs = [ ply ];
diff --git a/pkgs/development/python-modules/pmsensor/default.nix b/pkgs/development/python-modules/pmsensor/default.nix
index a13f92af4b7e1..b4f1d01cd4aeb 100644
--- a/pkgs/development/python-modules/pmsensor/default.nix
+++ b/pkgs/development/python-modules/pmsensor/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "7fc03aafb791ca70d847c9ab97cf181bc7d8f7345efb4b0c3f66c07b9c7dee69";
+    hash = "sha256-f8A6r7eRynDYR8mrl88YG8fY9zRe+0sMP2bAe5x97mk=";
   };
 
   propagatedBuildInputs = [ pyserial ];
diff --git a/pkgs/development/python-modules/pocket/default.nix b/pkgs/development/python-modules/pocket/default.nix
index 9783da3ac051d..19075a79c6a94 100644
--- a/pkgs/development/python-modules/pocket/default.nix
+++ b/pkgs/development/python-modules/pocket/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1fc9vc5nyzf1kzmnrs18dmns7nn8wjfrg7br1w4c5sgs35mg2ywh";
+    hash = "sha256-kHvxahn66cIID3mdl53kyNqjbW0o6Gzrn8F9bwvbibk=";
   };
 
   buildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/ponywhoosh/default.nix b/pkgs/development/python-modules/ponywhoosh/default.nix
index 4d067f0b0af48..183d948c2a475 100644
--- a/pkgs/development/python-modules/ponywhoosh/default.nix
+++ b/pkgs/development/python-modules/ponywhoosh/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1mggj9d265hra4z67qyla686qvl0cf79655cszi136gh9hqlibv9";
+    hash = "sha256-aa9IMUzwmRHi16wUk45jgG5skFHU42M+URkWI1qS79U=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/potr/default.nix b/pkgs/development/python-modules/potr/default.nix
index 7614880eae9f2..f0257c9dcf2b6 100644
--- a/pkgs/development/python-modules/potr/default.nix
+++ b/pkgs/development/python-modules/potr/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f95b9a7feaf8e3a6aaa898609f8a2ada55518cf52fc09152775c4c59c99b8ea6";
+    hash = "sha256-+Vuaf+r446aqqJhgn4oq2lVRjPUvwJFSd1xMWcmbjqY=";
   };
 
   propagatedBuildInputs = [ pycrypto ];
diff --git a/pkgs/development/python-modules/power/default.nix b/pkgs/development/python-modules/power/default.nix
index aef9acaf2bcf9..8b1235dc9fec8 100644
--- a/pkgs/development/python-modules/power/default.nix
+++ b/pkgs/development/python-modules/power/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "7d7d60ec332acbe3a7d00379b45e39abf650bf7ee311d61da5ab921f52f060f0";
+    hash = "sha256-fX1g7DMqy+On0AN5tF45q/ZQv37jEdYdpauSH1LwYPA=";
   };
 
   # Tests can't work because there is no power information available.
diff --git a/pkgs/development/python-modules/powerline-mem-segment/default.nix b/pkgs/development/python-modules/powerline-mem-segment/default.nix
index faaeb8890b7fd..0278968147605 100644
--- a/pkgs/development/python-modules/powerline-mem-segment/default.nix
+++ b/pkgs/development/python-modules/powerline-mem-segment/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0507zw7g449zk7dcq56adcdp71inbqfdmp6y5yk4x4j7kkp6pii9";
+    hash = "sha256-KcZr7pxHkk6mL97c2hxeNoZzG2vKFMzamT8R8g7/BxQ=";
   };
 
   propagatedBuildInputs = [ psutil ];
diff --git a/pkgs/development/python-modules/poyo/default.nix b/pkgs/development/python-modules/poyo/default.nix
index dfd6d3fa8213c..f1b9e8b62ecfe 100644
--- a/pkgs/development/python-modules/poyo/default.nix
+++ b/pkgs/development/python-modules/poyo/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "1pflivs6j22frz0v3dqxnvc8yb8fb52g11lqr88z0i8cg2m5csg2";
+    hash = "sha256-4mlWqngMRfARypiG8ERZDi2P2LYdt7HBz04IafSO1N0=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/preggy/default.nix b/pkgs/development/python-modules/preggy/default.nix
index 0054e56ae73fa..de1f90e462248 100644
--- a/pkgs/development/python-modules/preggy/default.nix
+++ b/pkgs/development/python-modules/preggy/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "25ba803afde4f35ef543a60915ced2e634926235064df717c3cb3e4e3eb4670c";
+    hash = "sha256-JbqAOv3k8171Q6YJFc7S5jSSYjUGTfcXw8s+Tj60Zww=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/priority/default.nix b/pkgs/development/python-modules/priority/default.nix
index 7b04d731a2479..bdf012a040548 100644
--- a/pkgs/development/python-modules/priority/default.nix
+++ b/pkgs/development/python-modules/priority/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "c965d54f1b8d0d0b19479db3924c7c36cf672dbf2aec92d43fbdaf4492ba18c0";
+    hash = "sha256-yWXVTxuNDQsZR52zkkx8Ns9nLb8q7JLUP72vRJK6GMA=";
   };
 
   build-system = [
diff --git a/pkgs/development/python-modules/progressbar/default.nix b/pkgs/development/python-modules/progressbar/default.nix
index 8b0abbfb3cf3c..2e402803dfe3b 100644
--- a/pkgs/development/python-modules/progressbar/default.nix
+++ b/pkgs/development/python-modules/progressbar/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "5d81cb529da2e223b53962afd6c8ca0f05c6670e40309a7219eacc36af9b6c63";
+    hash = "sha256-XYHLUp2i4iO1OWKv1sjKDwXGZw5AMJpyGerMNq+bbGM=";
   };
 
   # invalid command 'test'
diff --git a/pkgs/development/python-modules/progressbar33/default.nix b/pkgs/development/python-modules/progressbar33/default.nix
index 2c12014436bfe..faf05a0a7a844 100644
--- a/pkgs/development/python-modules/progressbar33/default.nix
+++ b/pkgs/development/python-modules/progressbar33/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1zvf6zs5hzrc03p9nfs4p16vhilqikycvv1yk0pxn8s07fdhvzji";
+    hash = "sha256-Uf4NmztAI9svmD7szfyMmEa4TbhEO5vuACx/WPQ3bv8=";
   };
 
   # no tests implemented
diff --git a/pkgs/development/python-modules/protobuf3-to-dict/default.nix b/pkgs/development/python-modules/protobuf3-to-dict/default.nix
index 7f65a21e30df1..f8aa37b259dd9 100644
--- a/pkgs/development/python-modules/protobuf3-to-dict/default.nix
+++ b/pkgs/development/python-modules/protobuf3-to-dict/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0nibblvj3n20zvq6d73zalbjqjby0w8ji5mim7inhn7vb9dw4hhy";
+    hash = "sha256-HkLCW1r7WGjjqbGWKBEHfkksF1V/nGbw/kDYITddK1o=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/pure-python-adb/default.nix b/pkgs/development/python-modules/pure-python-adb/default.nix
index f920e1dc52606..6ae80a64edba3 100644
--- a/pkgs/development/python-modules/pure-python-adb/default.nix
+++ b/pkgs/development/python-modules/pure-python-adb/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0kdr7w2fhgjpcf1k3l6an9im583iqkr6v8hb4q1zw30nh3bqkk0f";
+    hash = "sha256-DsyJ14AWDP4DJguibfLEcaBSY7LK0DGDY1c+6AQ/uU0=";
   };
 
   optional-dependencies = {
diff --git a/pkgs/development/python-modules/pushbullet-py/default.nix b/pkgs/development/python-modules/pushbullet-py/default.nix
index 9ba3ea89d4057..4cf23d30d8493 100644
--- a/pkgs/development/python-modules/pushbullet-py/default.nix
+++ b/pkgs/development/python-modules/pushbullet-py/default.nix
@@ -19,7 +19,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "pushbullet.py";
-    sha256 = "917883e1af4a0c979ce46076b391e0243eb8fe0a81c086544bcfa10f53e5ae64";
+    hash = "sha256-kXiD4a9KDJec5GB2s5HgJD64/gqBwIZUS8+hD1PlrmQ=";
   };
 
   nativeBuildInputs = [ setuptools ];
diff --git a/pkgs/development/python-modules/pweave/default.nix b/pkgs/development/python-modules/pweave/default.nix
index 1050a5fbdb735..ad28c2da684fd 100644
--- a/pkgs/development/python-modules/pweave/default.nix
+++ b/pkgs/development/python-modules/pweave/default.nix
@@ -19,7 +19,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "Pweave";
     inherit version;
-    sha256 = "5e5298d90e06414a01f48e0d6aa4c36a70c5f223d929f2a9c7e2d388451c7357";
+    hash = "sha256-XlKY2Q4GQUoB9I4NaqTDanDF8iPZKfKpx+LTiEUcc1c=";
   };
 
   disabled = !isPy3k;
diff --git a/pkgs/development/python-modules/py-air-control-exporter/default.nix b/pkgs/development/python-modules/py-air-control-exporter/default.nix
index 2b3290c32b94b..f297564a2f822 100644
--- a/pkgs/development/python-modules/py-air-control-exporter/default.nix
+++ b/pkgs/development/python-modules/py-air-control-exporter/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0cwhcyyjzc6wlj7jp5h7fcj1hl03wzrz1if3sg205kh2hfrzzlqq";
+    hash = "sha256-GNP/s4MCzgLE08PF8PPnA1AYJHMHliuPpNywL71nkDM=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/py-lru-cache/default.nix b/pkgs/development/python-modules/py-lru-cache/default.nix
index d445157a3897c..c9824171a13d2 100644
--- a/pkgs/development/python-modules/py-lru-cache/default.nix
+++ b/pkgs/development/python-modules/py-lru-cache/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "py_lru_cache";
-    sha256 = "1w3a8l3ckl1zz0f2vlfrawl9a402r458p7xzhy4sgq8k9rl37pq2";
+    hash = "sha256-At8zaE4T4aeJh7+fiwrJAhCVKFfZ0S0c+D/QyQZFavA=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/py/default.nix b/pkgs/development/python-modules/py/default.nix
index 6ea8602f8d59e..b20fc2f33155b 100644
--- a/pkgs/development/python-modules/py/default.nix
+++ b/pkgs/development/python-modules/py/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "51c75c4126074b472f746a24399ad32f6053d1b34b68d2fa41e558e6f4a98719";
+    hash = "sha256-UcdcQSYHS0cvdGokOZrTL2BT0bNLaNL6QeVY5vSphxk=";
   };
 
   # Circular dependency on pytest
diff --git a/pkgs/development/python-modules/pyaes/default.nix b/pkgs/development/python-modules/pyaes/default.nix
index 58cd4f155081a..4f04ddaca5bb6 100644
--- a/pkgs/development/python-modules/pyaes/default.nix
+++ b/pkgs/development/python-modules/pyaes/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "02c1b1405c38d3c370b085fb952dd8bea3fadcee6411ad99f312cc129c536d8f";
+    hash = "sha256-AsGxQFw408NwsIX7lS3YvqP63O5kEa2Z8xLMEpxTbY8=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/pyalgotrade/default.nix b/pkgs/development/python-modules/pyalgotrade/default.nix
index 1b709231644e8..29cf5e69824aa 100644
--- a/pkgs/development/python-modules/pyalgotrade/default.nix
+++ b/pkgs/development/python-modules/pyalgotrade/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PyAlgoTrade";
     inherit version;
-    sha256 = "7927c87af202869155280a93ff6ee934bb5b46cdb1f20b70f7407337f8541cbd";
+    hash = "sha256-eSfIevIChpFVKAqT/27pNLtbRs2x8gtw90BzN/hUHL0=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pycayennelpp/default.nix b/pkgs/development/python-modules/pycayennelpp/default.nix
index e16c16e280b11..f49c6a764fca5 100644
--- a/pkgs/development/python-modules/pycayennelpp/default.nix
+++ b/pkgs/development/python-modules/pycayennelpp/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1cc6lz28aa57gs74767xyd3i370lwx046yb5a1nfch6fk3kf7xdx";
+    hash = "sha256-vfXj5pjOQOZsUGV5Q0DnFJwRR/P9mEOOfqcohcSnhrE=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/pycflow2dot/default.nix b/pkgs/development/python-modules/pycflow2dot/default.nix
index 9d0d64a94917a..8edf03f7adf3a 100644
--- a/pkgs/development/python-modules/pycflow2dot/default.nix
+++ b/pkgs/development/python-modules/pycflow2dot/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1zm8x2pd0q6zza0fw7hg9g1qvybfnjq6ql9b8mh2fc45l7l25655";
+    hash = "sha256-pZgi6KGFMCdgRStRbLC0bvmNw0sPHu6A+t9g0K7oqP4=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/pychm/default.nix b/pkgs/development/python-modules/pychm/default.nix
index c450845d3e06e..ff87c1e1ef29b 100644
--- a/pkgs/development/python-modules/pychm/default.nix
+++ b/pkgs/development/python-modules/pychm/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0wpn9ijlsmrpyiwg3drmgz4dms1i1i347adgqw37bkrh3vn6yq16";
+    hash = "sha256-JmBv7B4wz3UGx6+pQ0YMMejayH81t/F49DdXTWVM9nI=";
   };
 
   buildInputs = [ chmlib ];
diff --git a/pkgs/development/python-modules/pycosat/default.nix b/pkgs/development/python-modules/pycosat/default.nix
index 4b633d197db14..b4deefb74afac 100644
--- a/pkgs/development/python-modules/pycosat/default.nix
+++ b/pkgs/development/python-modules/pycosat/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "4c99874946a7e939bb941bbb019dd2c20e6068e3107c91366e7779c69d70e0ed";
+    hash = "sha256-TJmHSUan6Tm7lBu7AZ3Swg5gaOMQfJE2bnd5xp1w4O0=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/pydenticon/default.nix b/pkgs/development/python-modules/pydenticon/default.nix
index 698a59f912270..a4fa74419398b 100644
--- a/pkgs/development/python-modules/pydenticon/default.nix
+++ b/pkgs/development/python-modules/pydenticon/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2ef363cdd6f4f0193ce62257486027e36884570f6140bbde51de72df321b77f1";
+    hash = "sha256-LvNjzdb08Bk85iJXSGAn42iEVw9hQLveUd5y3zIbd/E=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pydocumentdb/default.nix b/pkgs/development/python-modules/pydocumentdb/default.nix
index e6e20fb38033a..0567a48cf1265 100644
--- a/pkgs/development/python-modules/pydocumentdb/default.nix
+++ b/pkgs/development/python-modules/pydocumentdb/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1e6f072ae516fc061c9442f8ca470463b53dc626f0f6a86ff3a803293f4b50dd";
+    hash = "sha256-Hm8HKuUW/AYclEL4ykcEY7U9xibw9qhv86gDKT9LUN0=";
   };
 
   # https://github.com/Azure/azure-cosmos-python/issues/183
diff --git a/pkgs/development/python-modules/pydoods/default.nix b/pkgs/development/python-modules/pydoods/default.nix
index ff6cf609ac2b1..43b31e877b27f 100644
--- a/pkgs/development/python-modules/pydoods/default.nix
+++ b/pkgs/development/python-modules/pydoods/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1brpcfj1iy9mhf2inla4gi681zlh7g4qvhr6vrprk6r693glpn3x";
+    hash = "sha256-fdhL30gmm5lv3ibDjck7kP6ATHxEURuFgzX5GKRjN68=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/pyepsg/default.nix b/pkgs/development/python-modules/pyepsg/default.nix
index 92d0ddb225506..1f26a551c33c3 100644
--- a/pkgs/development/python-modules/pyepsg/default.nix
+++ b/pkgs/development/python-modules/pyepsg/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2d08fad1e7a8b47a90a4e43da485ba95705923425aefc4e2a3efa540dbd470d7";
+    hash = "sha256-LQj60eeotHqQpOQ9pIW6lXBZI0Ja78Tio++lQNvUcNc=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/pyfakewebcam/default.nix b/pkgs/development/python-modules/pyfakewebcam/default.nix
index c88a4e993e855..fbe21096b1fa9 100644
--- a/pkgs/development/python-modules/pyfakewebcam/default.nix
+++ b/pkgs/development/python-modules/pyfakewebcam/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "152nglscxmv7600i1i2gahny5z0bybnqgq3npak8npb0lsnwxn1a";
+    hash = "sha256-KtjOraZgXYumunbgh+3yC/ziLVRPxBABMGfXzjR9VpQ=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pyfreedompro/default.nix b/pkgs/development/python-modules/pyfreedompro/default.nix
index f37b6a88447e6..86cd8ca45428b 100644
--- a/pkgs/development/python-modules/pyfreedompro/default.nix
+++ b/pkgs/development/python-modules/pyfreedompro/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "92812070a0c74761fa0c8cac98ddbe0bca781c8de80e2b08dbd04492e831c172";
+    hash = "sha256-koEgcKDHR2H6DIysmN2+C8p4HI3oDisI29BEkugxwXI=";
   };
 
   propagatedBuildInputs = [ aiohttp ];
diff --git a/pkgs/development/python-modules/pyfttt/default.nix b/pkgs/development/python-modules/pyfttt/default.nix
index aa0c93156fc2e..39b2091c8ee3e 100644
--- a/pkgs/development/python-modules/pyfttt/default.nix
+++ b/pkgs/development/python-modules/pyfttt/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "10iq7c9c832ssl2xrvf62xf7znfvqzax6sq8ppsibq6wpb8dlnj5";
+    hash = "sha256-RVra0Lrc4BX1vQhr09XH29l/XBfG7dwF1VoMxBI7OII=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/pygments-markdown-lexer/default.nix b/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
index 451e120d3eba5..9835b7babb31d 100644
--- a/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
+++ b/pkgs/development/python-modules/pygments-markdown-lexer/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "1pzb5wy23q3fhs0rqzasjnw6hdzwjngpakb73i98cn0b8lk8q4jc";
+    hash = "sha256-TBKMJkULWIZSHGdNdZ+V/DdouJVafZyBhm7gITwv698=";
   };
 
   propagatedBuildInputs = [ pygments ];
diff --git a/pkgs/development/python-modules/pylibconfig2/default.nix b/pkgs/development/python-modules/pylibconfig2/default.nix
index 988b64430f27e..a57c50f6a2151 100644
--- a/pkgs/development/python-modules/pylibconfig2/default.nix
+++ b/pkgs/development/python-modules/pylibconfig2/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "1iwm11v0ghv2pq2cyvly7gdwrhxsx6iwi581fz46l0snhgcd4sqq";
+    hash = "sha256-GGvS2INWA2rIdwGVyKPpusPM2zuebs8EvmLDB3YIlcc=";
   };
 
   # tests not included in the distribution
diff --git a/pkgs/development/python-modules/pymacaroons/default.nix b/pkgs/development/python-modules/pymacaroons/default.nix
index c6a4f7f5b9fea..356c0c017275f 100644
--- a/pkgs/development/python-modules/pymacaroons/default.nix
+++ b/pkgs/development/python-modules/pymacaroons/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1e6bba42a5f66c245adf38a5a4006a99dcc06a0703786ea636098667d42903b8";
+    hash = "sha256-Hmu6QqX2bCRa3zilpABqmdzAagcDeG6mNgmGZ9QpA7g=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pymemoize/default.nix b/pkgs/development/python-modules/pymemoize/default.nix
index 2a92209d671bd..9fe63d10b0332 100644
--- a/pkgs/development/python-modules/pymemoize/default.nix
+++ b/pkgs/development/python-modules/pymemoize/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "PyMemoize";
-    sha256 = "0yqr60hm700zph6nv8wb6yp2s0i08mahxvw98bvkmw5ijbsviiq7";
+    hash = "sha256-B8e49ZKx8Dr3QonvDlVFIAItrjeLo20NvB+AUyEwGXs=";
   };
 
   nativeCheckInputs = [ django ];
diff --git a/pkgs/development/python-modules/pyment/default.nix b/pkgs/development/python-modules/pyment/default.nix
index 023dfd740de1c..09e7f514ec65a 100644
--- a/pkgs/development/python-modules/pyment/default.nix
+++ b/pkgs/development/python-modules/pyment/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "Pyment";
     inherit version;
-    sha256 = "951a4c52d6791ccec55bc739811169eed69917d3874f5fe722866623a697f39d";
+    hash = "sha256-lRpMUtZ5HM7FW8c5gRFp7taZF9OHT1/nIoZmI6aX850=";
   };
 
   # Tests are not included in PyPI tarball
diff --git a/pkgs/development/python-modules/pymysqlsa/default.nix b/pkgs/development/python-modules/pymysqlsa/default.nix
index e2d8503e06213..6659123b96006 100644
--- a/pkgs/development/python-modules/pymysqlsa/default.nix
+++ b/pkgs/development/python-modules/pymysqlsa/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "pymysql_sa";
-    sha256 = "a2676bce514a29b2d6ab418812259b0c2f7564150ac53455420a20bd7935314a";
+    hash = "sha256-omdrzlFKKbLWq0GIEiWbDC91ZBUKxTRVQgogvXk1MUo=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pync/default.nix b/pkgs/development/python-modules/pync/default.nix
index 53979649277d4..9799e59d02d98 100644
--- a/pkgs/development/python-modules/pync/default.nix
+++ b/pkgs/development/python-modules/pync/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "38b9e61735a3161f9211a5773c5f5ea698f36af4ff7f77fa03e8d1ff0caa117f";
+    hash = "sha256-OLnmFzWjFh+SEaV3PF9eppjzavT/f3f6A+jR/wyqEX8=";
   };
 
   nativeCheckInputs = [ which ];
diff --git a/pkgs/development/python-modules/pynzb/default.nix b/pkgs/development/python-modules/pynzb/default.nix
index da4d43d0e71bb..33127f9d2f3d1 100644
--- a/pkgs/development/python-modules/pynzb/default.nix
+++ b/pkgs/development/python-modules/pynzb/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0735b3889a1174bbb65418ee503629d3f5e4a63f04b16f46ffba18253ec3ef17";
+    hash = "sha256-BzWziJoRdLu2VBjuUDYp0/Xkpj8EsW9G/7oYJT7D7xc=";
   };
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/pyombi/default.nix b/pkgs/development/python-modules/pyombi/default.nix
index 90f367da2878e..25a17473a3c82 100644
--- a/pkgs/development/python-modules/pyombi/default.nix
+++ b/pkgs/development/python-modules/pyombi/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1ykbmdc2v05ly9q358j7g73ma9fsqdlclc8i0k1yd0bn7219icpx";
+    hash = "sha256-/bKYgjh2gebDBBExymjD2iVVx3lHojJw8rSALVira/o=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/pypblib/default.nix b/pkgs/development/python-modules/pypblib/default.nix
index e5547b0c6a954..bc8a1d1b5ffa5 100644
--- a/pkgs/development/python-modules/pypblib/default.nix
+++ b/pkgs/development/python-modules/pypblib/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0qlhykm9flj6cv3v0b9q40gy21yz0lnp0wxlxvb3ijkpy45r7pbi";
+    hash = "sha256-cd2TC/F3yjjW7rRzcC0F3wfhHyA4LbDHZkZSl+r0kGI=";
   };
 
   pythonImportsCheck = [ "pypblib" ];
diff --git a/pkgs/development/python-modules/pypca/default.nix b/pkgs/development/python-modules/pypca/default.nix
index 74a81987faa89..66842df7e4476 100644
--- a/pkgs/development/python-modules/pypca/default.nix
+++ b/pkgs/development/python-modules/pypca/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0y0p2rm22x21mykipiv42fjc79b0969qsbhk3cqkrdnqwh5psbdl";
+    hash = "sha256-tC19C+TYtjwxGxMujZNJYKXDpBNkxxunr0F0IWoWF3g=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pypeg2/default.nix b/pkgs/development/python-modules/pypeg2/default.nix
index 6c225f19dddd4..1aeeb5956db78 100644
--- a/pkgs/development/python-modules/pypeg2/default.nix
+++ b/pkgs/development/python-modules/pypeg2/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0v8ziaam2r637v94ra4dbjw6jzxz99gs5x4i585kgag1v204yb9b";
+    hash = "sha256-Ky1PgNjhqTcLKpH0ol9Kv39puFyNqEzSPsNkUZWKH20=";
   };
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/pyprind/default.nix b/pkgs/development/python-modules/pyprind/default.nix
index 133f86677c898..dff33195e759b 100644
--- a/pkgs/development/python-modules/pyprind/default.nix
+++ b/pkgs/development/python-modules/pyprind/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PyPrind";
     inherit version;
-    sha256 = "e37dcab6e1a9c8e0a7f0fce65fde7a79e2deda1c75aa015910a49e2137b54cbf";
+    hash = "sha256-433KtuGpyOCn8PzmX956eeLe2hx1qgFZEKSeITe1TL8=";
   };
 
   buildInputs = [ psutil ];
diff --git a/pkgs/development/python-modules/pyptlib/default.nix b/pkgs/development/python-modules/pyptlib/default.nix
index 98c1e46318ef1..4f2dfec002913 100644
--- a/pkgs/development/python-modules/pyptlib/default.nix
+++ b/pkgs/development/python-modules/pyptlib/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "01y6vbwncqb0hxlnin6whd9wrrm5my4qzjhk76fnix78v7ip515r";
+    hash = "sha256-uYRy49no9GidORPKj4mvpebMU4Pc2Ghph2BhZvnaxgc=";
   };
 
   doCheck = false; # No such file or directory errors on 32bit
diff --git a/pkgs/development/python-modules/pyqrcode/default.nix b/pkgs/development/python-modules/pyqrcode/default.nix
index 6ed1ca58e0d40..46aa2130a08b8 100644
--- a/pkgs/development/python-modules/pyqrcode/default.nix
+++ b/pkgs/development/python-modules/pyqrcode/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PyQRCode";
     inherit version;
-    sha256 = "fdbf7634733e56b72e27f9bce46e4550b75a3a2c420414035cae9d9d26b234d5";
+    hash = "sha256-/b92NHM+VrcuJ/m85G5FULdaOixCBBQDXK6dnSayNNU=";
   };
 
   # No tests in PyPI tarball
diff --git a/pkgs/development/python-modules/pyrabbit2/default.nix b/pkgs/development/python-modules/pyrabbit2/default.nix
index 40515e959ea2a..0101505be4a6d 100644
--- a/pkgs/development/python-modules/pyrabbit2/default.nix
+++ b/pkgs/development/python-modules/pyrabbit2/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "d27160cb35c096f0072df57307233d01b117a451236e136604a8e51be6f106c0";
+    hash = "sha256-0nFgyzXAlvAHLfVzByM9AbEXpFEjbhNmBKjlG+bxBsA=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/pyramid-mako/default.nix b/pkgs/development/python-modules/pyramid-mako/default.nix
index 4644bffdba25c..2d3ad5e364f6d 100644
--- a/pkgs/development/python-modules/pyramid-mako/default.nix
+++ b/pkgs/development/python-modules/pyramid-mako/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0066c863441f1c3ddea60cee1ccc50d00a91a317a8052ca44131da1a12a840e2";
+    hash = "sha256-AGbIY0QfHD3epgzuHMxQ0AqRoxeoBSykQTHaGhKoQOI=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/pyro-api/default.nix b/pkgs/development/python-modules/pyro-api/default.nix
index c5f2ea37e0c80..fc96b39d302cc 100644
--- a/pkgs/development/python-modules/pyro-api/default.nix
+++ b/pkgs/development/python-modules/pyro-api/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit version pname;
-    sha256 = "a1b900d9580aa1c2fab3b123ab7ff33413744da7c5f440bd4aadc4d40d14d920";
+    hash = "sha256-obkA2VgKocL6s7Ejq3/zNBN0TafF9EC9Sq3E1A0U2SA=";
   };
 
   pythonImportsCheck = [ "pyroapi" ];
diff --git a/pkgs/development/python-modules/pyrss2gen/default.nix b/pkgs/development/python-modules/pyrss2gen/default.nix
index c3efd81888b0e..879b137afdac1 100644
--- a/pkgs/development/python-modules/pyrss2gen/default.nix
+++ b/pkgs/development/python-modules/pyrss2gen/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PyRSS2Gen";
     inherit version;
-    sha256 = "1rvf5jw9hknqz02rp1vg8abgb1lpa0bc65l7ylmlillqx7bswq3r";
+    hash = "sha256-eWCu1+mY0kgr9YcWwxZQl4b1lkJvh5sF+NhOmLgsbuc=";
   };
 
   # No tests in archive
diff --git a/pkgs/development/python-modules/pyschedule/default.nix b/pkgs/development/python-modules/pyschedule/default.nix
index a62a288704fe1..8493eb3cb9fb4 100644
--- a/pkgs/development/python-modules/pyschedule/default.nix
+++ b/pkgs/development/python-modules/pyschedule/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "6bba9e9ea07906ce2dfe3cd847c1822b137f6b13e9f975c50b347312fd98e110";
+    hash = "sha256-a7qenqB5Bs4t/jzYR8GCKxN/axPp+XXFCzRzEv2Y4RA=";
   };
 
   propagatedBuildInputs = [ pulp ];
diff --git a/pkgs/development/python-modules/pyscrypt/default.nix b/pkgs/development/python-modules/pyscrypt/default.nix
index b6fc96296e6e2..1a7291ffd8856 100644
--- a/pkgs/development/python-modules/pyscrypt/default.nix
+++ b/pkgs/development/python-modules/pyscrypt/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1sd5pd5fpcdnpp4h58kdnvkf0s3afh4ssfqky2ap6z0gy6ax3zds";
+    hash = "sha256-uv3RlfEPfHOV8BM7rQl0amjg5rZtogLJvbax60q7pek=";
   };
 
   checkPhase = ''
diff --git a/pkgs/development/python-modules/pysdcp/default.nix b/pkgs/development/python-modules/pysdcp/default.nix
index 7a14902b42e8b..970c4bf70e364 100644
--- a/pkgs/development/python-modules/pysdcp/default.nix
+++ b/pkgs/development/python-modules/pysdcp/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "pySDCP";
     inherit version;
-    sha256 = "07396lsn610izaravqc6j5f6m0wjrzgc0d1r9dwqzj15g5zfc7wm";
+    hash = "sha256-lR/mfnklyI95Szk0wN7PkoNqXJGG4a2y+hEEYzU1aRw=";
   };
 
   # Project has no tests
diff --git a/pkgs/development/python-modules/pysftp/default.nix b/pkgs/development/python-modules/pysftp/default.nix
index 565abb80f9f3d..2a2e382e41745 100644
--- a/pkgs/development/python-modules/pysftp/default.nix
+++ b/pkgs/development/python-modules/pysftp/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0jl5qix5cxzrv4lb8rfpjkpcghbkacnxkb006ikn7mkl5s05mxgv";
+    hash = "sha256-+/VagC501mNnNACs2S1Tc8HH7pTXZbQo2fl3VnrEhUo=";
   };
 
   propagatedBuildInputs = [ paramiko ];
diff --git a/pkgs/development/python-modules/pysigset/default.nix b/pkgs/development/python-modules/pysigset/default.nix
index c1d980866a541..b89f5cc3f3b5e 100644
--- a/pkgs/development/python-modules/pysigset/default.nix
+++ b/pkgs/development/python-modules/pysigset/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "13ef98b058489ff572b6667c38970a544699895c0844cb3ac2494e3a59ac51e6";
+    hash = "sha256-E++YsFhIn/VytmZ8OJcKVEaZiVwIRMs6wklOOlmsUeY=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/pysingleton/default.nix b/pkgs/development/python-modules/pysingleton/default.nix
index 96461a73f82d1..89dcc13af04d6 100644
--- a/pkgs/development/python-modules/pysingleton/default.nix
+++ b/pkgs/development/python-modules/pysingleton/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "5776e7a4ba0bab26709da604f4e648c5814385fef34010723db3da0d41b0dbcc";
+    hash = "sha256-V3bnpLoLqyZwnaYE9OZIxYFDhf7zQBByPbPaDUGw28w=";
   };
 
   pythonImportsCheck = [ "singleton" ];
diff --git a/pkgs/development/python-modules/pysmf/default.nix b/pkgs/development/python-modules/pysmf/default.nix
index 3dca63ed4d39b..a7f5cb31c69fd 100644
--- a/pkgs/development/python-modules/pysmf/default.nix
+++ b/pkgs/development/python-modules/pysmf/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "10i7vvvdx6c3gl4afsgnpdanwgzzag087zs0fxvfipnqknazj806";
+    hash = "sha256-BiD5lZ3Y3uh2d0D/g8BT/z9uVbv2aacIfYOZ3vbeJ4I=";
   };
 
   postUnpack = ''
diff --git a/pkgs/development/python-modules/pysocks/default.nix b/pkgs/development/python-modules/pysocks/default.nix
index 6c521221391ca..ae4c1b413b35b 100644
--- a/pkgs/development/python-modules/pysocks/default.nix
+++ b/pkgs/development/python-modules/pysocks/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PySocks";
     inherit version;
-    sha256 = "184sg65mbmih6ljblfsxcmq5js5l7dj3gpn618w9q5dy3rbh921z";
+    hash = "sha256-P4gEVx6+FZw4CsbeN2Q7tGhZcGVdO7okNTDWVYt5mqA=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/pyspice/default.nix b/pkgs/development/python-modules/pyspice/default.nix
index e5915c23ab4e5..46de8fda30e53 100644
--- a/pkgs/development/python-modules/pyspice/default.nix
+++ b/pkgs/development/python-modules/pyspice/default.nix
@@ -22,7 +22,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PySpice";
     inherit version;
-    sha256 = "d28448accad98959e0f5932af8736e90a1f3f9ff965121c6881d24cdfca23d22";
+    hash = "sha256-0oRIrMrZiVng9ZMq+HNukKHz+f+WUSHGiB0kzfyiPSI=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pysqlitecipher/default.nix b/pkgs/development/python-modules/pysqlitecipher/default.nix
index 4fad187417294..a046a831f8125 100644
--- a/pkgs/development/python-modules/pysqlitecipher/default.nix
+++ b/pkgs/development/python-modules/pysqlitecipher/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "daff63ca2719fbd698aa10f64493c4b31fb67877a8e8dbb8090e9c03a1b1a9e4";
+    hash = "sha256-2v9jyicZ+9aYqhD2RJPEsx+2eHeo6Nu4CQ6cA6GxqeQ=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/pysychonaut/default.nix b/pkgs/development/python-modules/pysychonaut/default.nix
index b43101ce12ee3..2e6d484269f2a 100644
--- a/pkgs/development/python-modules/pysychonaut/default.nix
+++ b/pkgs/development/python-modules/pysychonaut/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PySychonaut";
     inherit version;
-    sha256 = "1wgk445gmi0x7xmd8qvnyxy1ka0n72fr6nrhzdm29q6687dqyi7h";
+    hash = "sha256-8ESP20HG4CRq+zBbk504FqgZfPd2Y9RqPx3E+goh8/E=";
   };
 
   preConfigure = ''
diff --git a/pkgs/development/python-modules/pytabix/default.nix b/pkgs/development/python-modules/pytabix/default.nix
index fe454cbfe0e14..1d9d87ce3bf8a 100644
--- a/pkgs/development/python-modules/pytabix/default.nix
+++ b/pkgs/development/python-modules/pytabix/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1ldp5r4ggskji6qx4bp2qxy2vrvb3fam03ksn0gq2hdxgrlg2x07";
+    hash = "sha256-B3TxaH69QYEfsHoOUJUba+ctfMfiLtKxiXLq90gut9E=";
   };
 
   buildInputs = [ zlib ];
diff --git a/pkgs/development/python-modules/pytankerkoenig/default.nix b/pkgs/development/python-modules/pytankerkoenig/default.nix
index ad5038d9280d0..74446f5247689 100644
--- a/pkgs/development/python-modules/pytankerkoenig/default.nix
+++ b/pkgs/development/python-modules/pytankerkoenig/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "021fg1a4n3527fz86zxfbsi0jrk0dnai1y92q6hwh5za68lrs710";
+    hash = "sha256-IBydKTLqF8ihwSL5EJVtYGYJol6uf4O+O6IMS1R4Lgg=";
   };
 
   # Tests require an API key and network access
diff --git a/pkgs/development/python-modules/pytest-astropy-header/default.nix b/pkgs/development/python-modules/pytest-astropy-header/default.nix
index f53bcfb838ca3..e6da9f411b498 100644
--- a/pkgs/development/python-modules/pytest-astropy-header/default.nix
+++ b/pkgs/development/python-modules/pytest-astropy-header/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "77891101c94b75a8ca305453b879b318ab6001b370df02be2c0b6d1bb322db10";
+    hash = "sha256-d4kRAclLdajKMFRTuHmzGKtgAbNw3wK+LAttG7Mi2xA=";
   };
 
   nativeBuildInputs = [ setuptools-scm ];
diff --git a/pkgs/development/python-modules/pytest-catchlog/default.nix b/pkgs/development/python-modules/pytest-catchlog/default.nix
index 903cbfec0fab7..6253f470a8faa 100644
--- a/pkgs/development/python-modules/pytest-catchlog/default.nix
+++ b/pkgs/development/python-modules/pytest-catchlog/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1w7wxh27sbqwm4jgwrjr9c2gy384aca5jzw9c0wzhl0pmk2mvqab";
+    hash = "sha256-S+FdxawXUPg5YIl/WRRTBA3/BEtZZv4kqRwvfQTs/PA=";
     extension = "zip";
   };
 
diff --git a/pkgs/development/python-modules/pytest-dotenv/default.nix b/pkgs/development/python-modules/pytest-dotenv/default.nix
index a89ebe0bd2ceb..652e50faff7d2 100644
--- a/pkgs/development/python-modules/pytest-dotenv/default.nix
+++ b/pkgs/development/python-modules/pytest-dotenv/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "LcbDrG2HZMccbSgE6QLQ/4EPoZaS6V/hOK78mxqnNzI=";
+    hash = "sha256-LcbDrG2HZMccbSgE6QLQ/4EPoZaS6V/hOK78mxqnNzI=";
   };
 
   buildInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/pytest-expect/default.nix b/pkgs/development/python-modules/pytest-expect/default.nix
index a21c970a3ecae..7ed205a91192e 100644
--- a/pkgs/development/python-modules/pytest-expect/default.nix
+++ b/pkgs/development/python-modules/pytest-expect/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "36b4462704450798197d090809a05f4e13649d9cba9acdc557ce9517da1fd847";
+    hash = "sha256-NrRGJwRFB5gZfQkICaBfThNknZy6ms3FV86VF9of2Ec=";
   };
 
   buildInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/pytest-flakes/default.nix b/pkgs/development/python-modules/pytest-flakes/default.nix
index 8f2260ec8f522..2d32fde954d37 100644
--- a/pkgs/development/python-modules/pytest-flakes/default.nix
+++ b/pkgs/development/python-modules/pytest-flakes/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "953134e97215ae31f6879fbd7368c18d43f709dc2fab5b7777db2bb2bac3a924";
+    hash = "sha256-lTE06XIVrjH2h5+9c2jBjUP3Cdwvq1t3d9srsrrDqSQ=";
   };
 
   buildInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/pytest-helpers-namespace/default.nix b/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
index f9b58f18bad55..49eda154559e4 100644
--- a/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
+++ b/pkgs/development/python-modules/pytest-helpers-namespace/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "792038247e0021beb966a7ea6e3a70ff5fcfba77eb72c6ec8fd6287af871c35b";
+    hash = "sha256-eSA4JH4AIb65Zqfqbjpw/1/Punfrcsbsj9Yoevhxw1s=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/development/python-modules/pytest-lazy-fixture/default.nix b/pkgs/development/python-modules/pytest-lazy-fixture/default.nix
index b251c4287384b..8f66af9543c23 100644
--- a/pkgs/development/python-modules/pytest-lazy-fixture/default.nix
+++ b/pkgs/development/python-modules/pytest-lazy-fixture/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1b0hmnsxw4s2wf9pks8dg6dfy5cx3zcbzs8517lfccxsfizhqz8f";
+    hash = "sha256-Dn0Mf3S6M+boCQXpv9gfnRXvmnkN6XmT40IT3rWtEKw=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/pytest-tornado/default.nix b/pkgs/development/python-modules/pytest-tornado/default.nix
index 8ca97fdad6138..a30b6cc18ca09 100644
--- a/pkgs/development/python-modules/pytest-tornado/default.nix
+++ b/pkgs/development/python-modules/pytest-tornado/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1cgisd7lb9q2hf55558cbn5jfhv65vsgk46ykgidzf9kqcq1kymr";
+    hash = "sha256-ufoZMMMzud/im96Q+fQuZkMni10MlVKKgwKnRU/T8bE=";
   };
 
   # package has no tests
diff --git a/pkgs/development/python-modules/pytest-warnings/default.nix b/pkgs/development/python-modules/pytest-warnings/default.nix
index d79138af5f414..9336ded86fcd7 100644
--- a/pkgs/development/python-modules/pytest-warnings/default.nix
+++ b/pkgs/development/python-modules/pytest-warnings/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "5939f76fe04ad18297e53af0c9fb38aca1ec74db807bd40ad72733603adbbc7d";
+    hash = "sha256-WTn3b+BK0YKX5Trwyfs4rKHsdNuAe9QK1yczYDrbvH0=";
   };
 
   buildInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/pytest-watch/default.nix b/pkgs/development/python-modules/pytest-watch/default.nix
index f8bf50c9fd4eb..6258cccd2af59 100644
--- a/pkgs/development/python-modules/pytest-watch/default.nix
+++ b/pkgs/development/python-modules/pytest-watch/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "06136f03d5b361718b8d0d234042f7b2f203910d8568f63df2f866b547b3d4b9";
+    hash = "sha256-BhNvA9WzYXGLjQ0jQEL3svIDkQ2FaPY98vhmtUez1Lk=";
   };
 
   buildInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/pytestcache/default.nix b/pkgs/development/python-modules/pytestcache/default.nix
index 9b6be02d845f9..fd6597960e212 100644
--- a/pkgs/development/python-modules/pytestcache/default.nix
+++ b/pkgs/development/python-modules/pytestcache/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1a873fihw4rhshc722j4h6j7g3nj7xpgsna9hhg3zn6ksknnhx5y";
+    hash = "sha256-vnRo7dTT2D8ehElZ/W4/0o53pIFECnEY1DATDqMbB6k=";
   };
 
   buildInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/python-axolotl-curve25519/default.nix b/pkgs/development/python-modules/python-axolotl-curve25519/default.nix
index dcdb145453490..6668000984afa 100644
--- a/pkgs/development/python-modules/python-axolotl-curve25519/default.nix
+++ b/pkgs/development/python-modules/python-axolotl-curve25519/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0705a66297ebd2f508a60dc94e22881c754301eb81db93963322f6b3bdcb63a3";
+    hash = "sha256-BwWmYpfr0vUIpg3JTiKIHHVDAeuB25OWMyL2s73LY6M=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/python-axolotl/default.nix b/pkgs/development/python-modules/python-axolotl/default.nix
index 1c0e848ebc1e3..ec3f27b8ed8de 100644
--- a/pkgs/development/python-modules/python-axolotl/default.nix
+++ b/pkgs/development/python-modules/python-axolotl/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1bwdp24fmriffwx91aigs9k162albb51iskp23nc939z893q23py";
+    hash = "sha256-/g6BR0I/jcTsEHfqGMpaVAkTZtIvqpA6dy7m6oi4ja8=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/python-baseconv/default.nix b/pkgs/development/python-modules/python-baseconv/default.nix
index ad8a7f8dcbd67..e4a823ec12fb5 100644
--- a/pkgs/development/python-modules/python-baseconv/default.nix
+++ b/pkgs/development/python-modules/python-baseconv/default.nix
@@ -10,7 +10,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0539f8bd0464013b05ad62e0a1673f0ac9086c76b43ebf9f833053527cd9931b";
+    hash = "sha256-BTn4vQRkATsFrWLgoWc/CskIbHa0Pr+fgzBTUnzZkxs=";
   };
 
   pythonImportsCheck = [ "baseconv" ];
diff --git a/pkgs/development/python-modules/python-ldap-test/default.nix b/pkgs/development/python-modules/python-ldap-test/default.nix
index 176b2f7978c9a..580405144e25c 100644
--- a/pkgs/development/python-modules/python-ldap-test/default.nix
+++ b/pkgs/development/python-modules/python-ldap-test/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1qh9x3lncaldnw79fgpqbayichs8pbz8abr6pxb5qxbs7zrnyrwf";
+    hash = "sha256-jmdv8z96dVxWvyYvhf66SEMWvVr4PpcOt40qZunoCeI=";
   };
 
   propagatedBuildInputs = [ py4j ];
diff --git a/pkgs/development/python-modules/python-mnist/default.nix b/pkgs/development/python-modules/python-mnist/default.nix
index 2bd23d7404e0c..c5ce6936d4ab2 100644
--- a/pkgs/development/python-modules/python-mnist/default.nix
+++ b/pkgs/development/python-modules/python-mnist/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "a0cced01e83b5b844cff86109280df7a672a8e4e38fc19fa68999a17f8a9fbd8";
+    hash = "sha256-oMztAeg7W4RM/4YQkoDfemcqjk44/Bn6aJmaF/ip+9g=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/python-oauth2/default.nix b/pkgs/development/python-modules/python-oauth2/default.nix
index 518e0c926aa94..d16fc5b6976b5 100644
--- a/pkgs/development/python-modules/python-oauth2/default.nix
+++ b/pkgs/development/python-modules/python-oauth2/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "d7a8544927ac18215ba5317edd8f640a5f1f0593921bcf3ce862178312c8c9a4";
+    hash = "sha256-16hUSSesGCFbpTF+3Y9kCl8fBZOSG8886GIXgxLIyaQ=";
   };
   # attempts to run mysql
   doCheck = false;
diff --git a/pkgs/development/python-modules/python-packer/default.nix b/pkgs/development/python-modules/python-packer/default.nix
index c8912328a88ce..e931f0f5ce864 100644
--- a/pkgs/development/python-modules/python-packer/default.nix
+++ b/pkgs/development/python-modules/python-packer/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "fd363dae9bd2efd447739bbf7a4f29c1e4741596ae7b02d252fe525b2b4176e7";
+    hash = "sha256-/TY9rpvS79RHc5u/ek8pweR0FZauewLSUv5SWytBduc=";
   };
 
   patches = fetchpatch {
diff --git a/pkgs/development/python-modules/python-pipedrive/default.nix b/pkgs/development/python-modules/python-pipedrive/default.nix
index 74edd260a94f2..5759db6505fd6 100644
--- a/pkgs/development/python-modules/python-pipedrive/default.nix
+++ b/pkgs/development/python-modules/python-pipedrive/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0f8qiyl82bpwxwjw2746vdvkps2010mvn1x9b6j6ppmifff2d4pl";
+    hash = "sha256-9JImnHOx3mukWakHuysIQOg7d9uGHMEl7/wugaiPGDk=";
   };
 
   propagatedBuildInputs = [ httplib2 ];
diff --git a/pkgs/development/python-modules/python-prctl/default.nix b/pkgs/development/python-modules/python-prctl/default.nix
index e5b132bb885bc..996c2f30bf259 100644
--- a/pkgs/development/python-modules/python-prctl/default.nix
+++ b/pkgs/development/python-modules/python-prctl/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b4ca9a25a7d4f1ace4fffd1f3a2e64ef5208fe05f929f3edd5e27081ca7e67ce";
+    hash = "sha256-tMqaJafU8azk//0fOi5k71II/gX5KfPt1eJwgcp+Z84=";
   };
 
   buildInputs = [ libcap ];
diff --git a/pkgs/development/python-modules/python-status/default.nix b/pkgs/development/python-modules/python-status/default.nix
index f344d0d856fd7..41692ee52c30f 100644
--- a/pkgs/development/python-modules/python-status/default.nix
+++ b/pkgs/development/python-modules/python-status/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0lryrvmi04g7d38ilm4wfw717m0ddhylrzb5cm59lrp3ai3q572f";
+    hash = "sha256-TpyCR1TjZppKZWX9TD1sDdQTDnecVBrRaOcREOvOPlM=";
   };
 
   # Project doesn't ship tests yet
diff --git a/pkgs/development/python-modules/python-u2flib-host/default.nix b/pkgs/development/python-modules/python-u2flib-host/default.nix
index 18b97e94e811c..da3c2168c758f 100644
--- a/pkgs/development/python-modules/python-u2flib-host/default.nix
+++ b/pkgs/development/python-modules/python-u2flib-host/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "02pwafd5kyjpc310ys0pgnd0adff1laz18naxxwsfrllqafqnrxb";
+    hash = "sha256-q2eLncKUZqd578qi8BUNzjUFmn0XaA/CYFf6WZpT/Ao=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/python-wink/default.nix b/pkgs/development/python-modules/python-wink/default.nix
index 82fa589a1a35a..fd22d5211c222 100644
--- a/pkgs/development/python-modules/python-wink/default.nix
+++ b/pkgs/development/python-modules/python-wink/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1r6qabnqxyy3llnj10z60d4w9pg2zabysl3l7znpy1adss4ywxl0";
+    hash = "sha256-gHbuidZNBX/tP3RQ7Zf64t3ESQPmgyAtpcP7ju1S2OQ=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/python3-openid/default.nix b/pkgs/development/python-modules/python3-openid/default.nix
index 6edcb500db2a1..35193798609bd 100644
--- a/pkgs/development/python-modules/python3-openid/default.nix
+++ b/pkgs/development/python-modules/python3-openid/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1bxf9a3ny1js422j962zfzl4a9dhj192pvai05whn7j0iy9gdyrk";
+    hash = "sha256-M/v2ko9AHgt5AVHtK1KQsCVF6HdfmCSFIFoGb4dKrq8=";
   };
 
   propagatedBuildInputs = [ defusedxml ];
diff --git a/pkgs/development/python-modules/pythondialog/default.nix b/pkgs/development/python-modules/pythondialog/default.nix
index 2fb348c0ba911..61838f4aac8be 100644
--- a/pkgs/development/python-modules/pythondialog/default.nix
+++ b/pkgs/development/python-modules/pythondialog/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b2a34a8af0a6625ccbdf45cd343b854fc6c1a85231dadc80b8805db836756323";
+    hash = "sha256-sqNKivCmYlzL30XNNDuFT8bBqFIx2tyAuIBduDZ1YyM=";
   };
 
   patchPhase = ''
diff --git a/pkgs/development/python-modules/pytidylib/default.nix b/pkgs/development/python-modules/pytidylib/default.nix
index a623602dfce6d..9081d005bada9 100644
--- a/pkgs/development/python-modules/pytidylib/default.nix
+++ b/pkgs/development/python-modules/pytidylib/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "22b1c8d75970d8064ff999c2369e98af1d0685417eda4c829a5c9f56764b0af3";
+    hash = "sha256-IrHI11lw2AZP+ZnCNp6Yrx0GhUF+2kyCmlyfVnZLCvM=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/pytransportnsw/default.nix b/pkgs/development/python-modules/pytransportnsw/default.nix
index bc5ebb6885d14..5096f130cdd40 100644
--- a/pkgs/development/python-modules/pytransportnsw/default.nix
+++ b/pkgs/development/python-modules/pytransportnsw/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "PyTransportNSW";
     inherit version;
-    sha256 = "00jklgjirmc58hiaqqc2n2rgixvx91bgrd6lv6hv28k51kid10f3";
+    hash = "sha256-w4HQ4gxlIrGh2dS0/FZIfff4srCCYawiRIXVHOWjUwI=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/pytz-deprecation-shim/default.nix b/pkgs/development/python-modules/pytz-deprecation-shim/default.nix
index d9258a6ebc828..3816fdb4a87dc 100644
--- a/pkgs/development/python-modules/pytz-deprecation-shim/default.nix
+++ b/pkgs/development/python-modules/pytz-deprecation-shim/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "pytz_deprecation_shim";
     inherit version;
-    sha256 = "af097bae1b616dde5c5744441e2ddc69e74dfdcb0c263129610d85b87445a59d";
+    hash = "sha256-rwl7rhthbd5cV0REHi3caedN/csMJjEpYQ2FuHRFpZ0=";
   };
 
   nativeBuildInputs = [ setuptools ];
diff --git a/pkgs/development/python-modules/pyunifi/default.nix b/pkgs/development/python-modules/pyunifi/default.nix
index 88890c4af0857..a4583bf0f6fbb 100644
--- a/pkgs/development/python-modules/pyunifi/default.nix
+++ b/pkgs/development/python-modules/pyunifi/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ea7919caee14abe741016d8e37e96bc67a43e22f77c079e55962273f39dbea4e";
+    hash = "sha256-6nkZyu4Uq+dBAW2ON+lrxnpD4i93wHnlWWInPznb6k4=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/pyverilog/default.nix b/pkgs/development/python-modules/pyverilog/default.nix
index a22a0abfba21b..a006f9db0eef4 100644
--- a/pkgs/development/python-modules/pyverilog/default.nix
+++ b/pkgs/development/python-modules/pyverilog/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1a74k8r21swmfwvgv4c014y6nbcyl229fspxw89ygsgb0j83xnar";
+    hash = "sha256-Wdk+kATr6ecT4v1ql4Sgni1rPAmAkf02d5XrIDKa5Kg=";
   };
 
   patchPhase = ''
diff --git a/pkgs/development/python-modules/pyxeoma/default.nix b/pkgs/development/python-modules/pyxeoma/default.nix
index 596c3e865f697..9a3430ad9abd8 100644
--- a/pkgs/development/python-modules/pyxeoma/default.nix
+++ b/pkgs/development/python-modules/pyxeoma/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "c6a3ed855025662df9b35ae2d1cac3fa41775a7612655804bde7276a8cab8d1c";
+    hash = "sha256-xqPthVAlZi35s1ri0crD+kF3WnYSZVgEvecnaoyrjRw=";
   };
 
   propagatedBuildInputs = [ aiohttp ];
diff --git a/pkgs/development/python-modules/qt5reactor/default.nix b/pkgs/development/python-modules/qt5reactor/default.nix
index 6bc07621c7d80..2e566d6361262 100644
--- a/pkgs/development/python-modules/qt5reactor/default.nix
+++ b/pkgs/development/python-modules/qt5reactor/default.nix
@@ -19,7 +19,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "c3470a8a25d9a339f9ca6243502a9b2277f181d772b7acbff551d5bc363b7572";
+    hash = "sha256-w0cKiiXZozn5ymJDUCqbInfxgddyt6y/9VHVvDY7dXI=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/random2/default.nix b/pkgs/development/python-modules/random2/default.nix
index 9e23cfcd8b3d6..7e97fddbd565d 100644
--- a/pkgs/development/python-modules/random2/default.nix
+++ b/pkgs/development/python-modules/random2/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "34ad30aac341039872401595df9ab2c9dc36d0b7c077db1cea9ade430ed1c007";
+    hash = "sha256-NK0wqsNBA5hyQBWV35qyydw20LfAd9sc6preQw7RwAc=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/ratelim/default.nix b/pkgs/development/python-modules/ratelim/default.nix
index a8ede1537a19f..9e955acdbf77c 100644
--- a/pkgs/development/python-modules/ratelim/default.nix
+++ b/pkgs/development/python-modules/ratelim/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "07dirdd8y23706110nb0lfz5pzbrcvd9y74h64la3y8igqbk4vc2";
+    hash = "sha256-gm0yF34R+aEoMZAcn9pmef1bvqNgWRCCAWcIj1rLsR0=";
   };
 
   propagatedBuildInputs = [ decorator ];
diff --git a/pkgs/development/python-modules/rawkit/default.nix b/pkgs/development/python-modules/rawkit/default.nix
index ec1191875a27d..ab8fab059accd 100644
--- a/pkgs/development/python-modules/rawkit/default.nix
+++ b/pkgs/development/python-modules/rawkit/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0vrhrpr70i61y5q5ysk341x1539ff1q1k82g59zq69lv16s0f76s";
+    hash = "sha256-2hwHtAmbJoN/Kk+gGXBwLo0SeiBjal9w8cFEcPLNMG8=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/readme/default.nix b/pkgs/development/python-modules/readme/default.nix
index c7142c7f2bf60..f8868586c8334 100644
--- a/pkgs/development/python-modules/readme/default.nix
+++ b/pkgs/development/python-modules/readme/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "32fbe1538a437da160fa4e4477270bfdcd8876e2e364d0d12898302644496231";
+    hash = "sha256-MvvhU4pDfaFg+k5EdycL/c2IduLjZNDRKJgwJkRJYjE=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/requestsexceptions/default.nix b/pkgs/development/python-modules/requestsexceptions/default.nix
index e9d7957ced51b..66b88ca6806d4 100644
--- a/pkgs/development/python-modules/requestsexceptions/default.nix
+++ b/pkgs/development/python-modules/requestsexceptions/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b095cbc77618f066d459a02b137b020c37da9f46d9b057704019c9f77dba3065";
+    hash = "sha256-sJXLx3YY8GbUWaArE3sCDDfan0bZsFdwQBnJ9326MGU=";
   };
 
   propagatedBuildInputs = [ pbr ];
diff --git a/pkgs/development/python-modules/retry/default.nix b/pkgs/development/python-modules/retry/default.nix
index 3d80319ff604e..ccffbe9b37449 100644
--- a/pkgs/development/python-modules/retry/default.nix
+++ b/pkgs/development/python-modules/retry/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f8bfa8b99b69c4506d6f5bd3b0aabf77f98cdb17f3c9fc3f5ca820033336fba4";
+    hash = "sha256-+L+ouZtpxFBtb1vTsKq/d/mM2xfzyfw/XKggAzM2+6Q=";
   };
 
   nativeBuildInputs = [ pbr ];
diff --git a/pkgs/development/python-modules/rfc3339-validator/default.nix b/pkgs/development/python-modules/rfc3339-validator/default.nix
index 27da24deb82d2..18b051ef25883 100644
--- a/pkgs/development/python-modules/rfc3339-validator/default.nix
+++ b/pkgs/development/python-modules/rfc3339-validator/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "rfc3339_validator";
     inherit version;
-    sha256 = "0srg0b89aikzinw72s433994k5gv5lfyarq1adhas11kz6yjm2hk";
+    hash = "sha256-E4oqvfkzBK1gUwFn5R0t+5VJUhqDaHG4jX9GldACL2s=";
   };
 
   propagatedBuildInputs = [ six ];
diff --git a/pkgs/development/python-modules/rfc3339/default.nix b/pkgs/development/python-modules/rfc3339/default.nix
index 19250ac307f4f..4698a478adca4 100644
--- a/pkgs/development/python-modules/rfc3339/default.nix
+++ b/pkgs/development/python-modules/rfc3339/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1l6l1bh91i2r4dwcm86hlkx8cbh1xwgsk8hb4jvr5y5fxxg3ng6m";
+    hash = "sha256-1Tw7Xu+u+JK3JAuiqR/vAS6G+qTQoMp4I1nEkOAK1NA=";
   };
 
   # Project has no tests
diff --git a/pkgs/development/python-modules/rfc3987/default.nix b/pkgs/development/python-modules/rfc3987/default.nix
index 10d144063a213..81bd46335f549 100644
--- a/pkgs/development/python-modules/rfc3987/default.nix
+++ b/pkgs/development/python-modules/rfc3987/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "d3c4d257a560d544e9826b38bc81db676890c79ab9d7ac92b39c7a253d5ca733";
+    hash = "sha256-08TSV6Vg1UTpgms4vIHbZ2iQx5q516ySs5x6JT1cpzM=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/rfc7464/default.nix b/pkgs/development/python-modules/rfc7464/default.nix
index 80e1d3a590e98..333005044e163 100644
--- a/pkgs/development/python-modules/rfc7464/default.nix
+++ b/pkgs/development/python-modules/rfc7464/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1hcn6h38qplfcmq392cs58r01k16k202bqyap4br02376pr4ik7a";
+    hash = "sha256-6sxI8jVnCJAXucrjJYCYJswAMiqaiTRwZY5ejAY0lsE=";
     extension = "zip";
   };
 
diff --git a/pkgs/development/python-modules/ritassist/default.nix b/pkgs/development/python-modules/ritassist/default.nix
index 29605d1e65d15..63ff12210921e 100644
--- a/pkgs/development/python-modules/ritassist/default.nix
+++ b/pkgs/development/python-modules/ritassist/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1JCKWb+3mdQYnL250Ml+kFkx6VAlBC7FL6XcQlQ+kC4=";
+    hash = "sha256-1JCKWb+3mdQYnL250Ml+kFkx6VAlBC7FL6XcQlQ+kC4=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/rmcl/default.nix b/pkgs/development/python-modules/rmcl/default.nix
index 232910d56e181..ec8eb17585fbe 100644
--- a/pkgs/development/python-modules/rmcl/default.nix
+++ b/pkgs/development/python-modules/rmcl/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "58de4758e7e3cb7acbf28fcfa80f4155252afdfb191beb4ba4aa36961f66cc67";
+    hash = "sha256-WN5HWOfjy3rL8o/PqA9BVSUq/fsZG+tLpKo2lh9mzGc=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/robot-detection/default.nix b/pkgs/development/python-modules/robot-detection/default.nix
index b343afa58f6e5..e3c118e075e21 100644
--- a/pkgs/development/python-modules/robot-detection/default.nix
+++ b/pkgs/development/python-modules/robot-detection/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1xd2jm3yn31bnk1kqzggils2rxj26ylxsfz3ap7bhr3ilhnbg3rx";
+    hash = "sha256-PY+3LKRxZLjOVeM73ak3QvYsNI3vfTzDtCsM60eVovU=";
   };
 
   propagatedBuildInputs = [ six ];
diff --git a/pkgs/development/python-modules/robotframework-selenium2library/default.nix b/pkgs/development/python-modules/robotframework-selenium2library/default.nix
index 5e3cae9270b53..32bfa61a00702 100644
--- a/pkgs/development/python-modules/robotframework-selenium2library/default.nix
+++ b/pkgs/development/python-modules/robotframework-selenium2library/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "2a8e942b0788b16ded253039008b34d2b46199283461b294f0f41a579c70fda7";
+    hash = "sha256-Ko6UKweIsW3tJTA5AIs00rRhmSg0YbKU8PQaV5xw/ac=";
   };
 
   # Neither the PyPI tarball nor the repository has tests
diff --git a/pkgs/development/python-modules/robotframework-sshlibrary/default.nix b/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
index a9d1afb9dd15d..20e658bff8002 100644
--- a/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
+++ b/pkgs/development/python-modules/robotframework-sshlibrary/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "aedf8a02bcb7344404cf8575d0ada25d6c7dc2fcb65de2113c4e07c63d2446c2";
+    hash = "sha256-rt+KAry3NEQEz4V10K2iXWx9wvy2XeIRPE4Hxj0kRsI=";
   };
 
   # unit tests are impure
diff --git a/pkgs/development/python-modules/rocket-errbot/default.nix b/pkgs/development/python-modules/rocket-errbot/default.nix
index 57c9d2eeae31e..cfaf1409480d3 100644
--- a/pkgs/development/python-modules/rocket-errbot/default.nix
+++ b/pkgs/development/python-modules/rocket-errbot/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "181y1wqjvlry5xdzbliajvrxvswzh3myh795jnj1pm92r5grqzda";
+    hash = "sha256-qn2cX8ki1RuklSUd6OuAn+vd85Yq0vVbLz7TLTEPPqA=";
   };
 
   # remove with 1.2.6
diff --git a/pkgs/development/python-modules/routes/default.nix b/pkgs/development/python-modules/routes/default.nix
index 9f2afb77bb097..f6f0e79bd1176 100644
--- a/pkgs/development/python-modules/routes/default.nix
+++ b/pkgs/development/python-modules/routes/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "Routes";
     inherit version;
-    sha256 = "b6346459a15f0cbab01a45a90c3d25caf980d4733d628b4cc1952b865125d053";
+    hash = "sha256-tjRkWaFfDLqwGkWpDD0lyvmA1HM9YotMwZUrhlEl0FM=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/rtmidi-python/default.nix b/pkgs/development/python-modules/rtmidi-python/default.nix
index fe2aa3c54f8eb..e55d82d091c1a 100644
--- a/pkgs/development/python-modules/rtmidi-python/default.nix
+++ b/pkgs/development/python-modules/rtmidi-python/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1wpcaxfpbmsjc78g8841kpixr0a3v6zn0ak058s3mm25kcysp4m0";
+    hash = "sha256-oJKrPZtF1Do0KmAqYL/ZQ4Hc452BIPTQYVLXdV1X7PI=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/ruamel-base/default.nix b/pkgs/development/python-modules/ruamel-base/default.nix
index 2ceefbf2f6f2e..8478390268d16 100644
--- a/pkgs/development/python-modules/ruamel-base/default.nix
+++ b/pkgs/development/python-modules/ruamel-base/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "ruamel.base";
     inherit version;
-    sha256 = "1wswxrn4givsm917mfl39rafgadimf1sldpbjdjws00g1wx36hf0";
+    hash = "sha256-wEEzOg8PAM1lk+s2qoOrsannVE6DunpCqnrHR2zuXPM=";
   };
 
   # no tests
diff --git a/pkgs/development/python-modules/rx/default.nix b/pkgs/development/python-modules/rx/default.nix
index 76f02155f3aba..21a9b760ad0df 100644
--- a/pkgs/development/python-modules/rx/default.nix
+++ b/pkgs/development/python-modules/rx/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "Rx";
-    sha256 = "b657ca2b45aa485da2f7dcfd09fac2e554f7ac51ff3c2f8f2ff962ecd963d91c";
+    hash = "sha256-tlfKK0WqSF2i99z9CfrC5VT3rFH/PC+PL/li7Nlj2Rw=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/s2clientprotocol/default.nix b/pkgs/development/python-modules/s2clientprotocol/default.nix
index 08ce5f72eaaa3..f31d4477759c9 100644
--- a/pkgs/development/python-modules/s2clientprotocol/default.nix
+++ b/pkgs/development/python-modules/s2clientprotocol/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "02jqwdfj5zpag4c5nf0707qmwk7sqm98yfgrd19rq6pi58zgl74f";
+    hash = "sha256-jhz6PirxGpxTaPk5j1LF+kxe8QEHOFsYeer+Il3jWAo=";
   };
 
   patches = [ ./pure-version.patch ];
diff --git a/pkgs/development/python-modules/safeio/default.nix b/pkgs/development/python-modules/safeio/default.nix
index 85dbc04339e66..1781088df6440 100644
--- a/pkgs/development/python-modules/safeio/default.nix
+++ b/pkgs/development/python-modules/safeio/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "safeIO";
     inherit version;
-    sha256 = "d480a6dab01a390ebc24c12d6b774ad00cef3db5348ad07d8bd11d272a808cd3";
+    hash = "sha256-1ICm2rAaOQ68JMEta3dK0AzvPbU0itB9i9EdJyqAjNM=";
   };
 
   pythonImportsCheck = [ "safeIO" ];
diff --git a/pkgs/development/python-modules/samsungctl/default.nix b/pkgs/development/python-modules/samsungctl/default.nix
index 5e438dc1caaca..801375b5f3393 100644
--- a/pkgs/development/python-modules/samsungctl/default.nix
+++ b/pkgs/development/python-modules/samsungctl/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0ipz3fd65rqkxlb02sql0awc3vnslrwb2pfrsnpfnf8bfgxpbh9g";
+    hash = "sha256-L8F1+3MLOeuu1dldsXim2u7BuAIUawEW7RPnYpob/0Y=";
   };
 
   optional-dependencies = {
diff --git a/pkgs/development/python-modules/sane/default.nix b/pkgs/development/python-modules/sane/default.nix
index 41bae43c4b1e2..cfd9876307073 100644
--- a/pkgs/development/python-modules/sane/default.nix
+++ b/pkgs/development/python-modules/sane/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "python-sane";
-    sha256 = "JAmOuDxujhsBEm5q16WwR5wHsBPF0iBQm1VYkv5JJd4=";
+    hash = "sha256-JAmOuDxujhsBEm5q16WwR5wHsBPF0iBQm1VYkv5JJd4=";
   };
 
   buildInputs = [ sane-backends ];
diff --git a/pkgs/development/python-modules/sansio-multipart/default.nix b/pkgs/development/python-modules/sansio-multipart/default.nix
index aa12f71a01e7a..d8283a4c90718 100644
--- a/pkgs/development/python-modules/sansio-multipart/default.nix
+++ b/pkgs/development/python-modules/sansio-multipart/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "sansio_multipart";
     inherit version;
-    sha256 = "6e95b2e64039a95d0f2cd8f3360eaf418d6b9018fb2215d82d399d62d6122dc3";
+    hash = "sha256-bpWy5kA5qV0PLNjzNg6vQY1rkBj7IhXYLTmdYtYSLcM=";
   };
 
   # upstream has no tests
diff --git a/pkgs/development/python-modules/sarif-om/default.nix b/pkgs/development/python-modules/sarif-om/default.nix
index 1eabe2ee461e7..d5a2107d62625 100644
--- a/pkgs/development/python-modules/sarif-om/default.nix
+++ b/pkgs/development/python-modules/sarif-om/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "sarif_om";
     inherit version;
-    sha256 = "cd5f416b3083e00d402a92e449a7ff67af46f11241073eea0461802a3b5aef98";
+    hash = "sha256-zV9BazCD4A1AKpLkSaf/Z69G8RJBBz7qBGGAKjta75g=";
   };
 
   nativeBuildInputs = [ pbr ];
diff --git a/pkgs/development/python-modules/scour/default.nix b/pkgs/development/python-modules/scour/default.nix
index ffda524843d58..56abdbf8f97d2 100644
--- a/pkgs/development/python-modules/scour/default.nix
+++ b/pkgs/development/python-modules/scour/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "6881ec26660c130c5ecd996ac6f6b03939dd574198f50773f2508b81a68e0daf";
+    hash = "sha256-aIHsJmYMEwxezZlqxvawOTndV0GY9Qdz8lCLgaaODa8=";
   };
 
   propagatedBuildInputs = [ six ];
diff --git a/pkgs/development/python-modules/sdnotify/default.nix b/pkgs/development/python-modules/sdnotify/default.nix
index 6f775615c85bc..090a458bac8ad 100644
--- a/pkgs/development/python-modules/sdnotify/default.nix
+++ b/pkgs/development/python-modules/sdnotify/default.nix
@@ -10,7 +10,7 @@ buildPythonPackage rec {
   format = "setuptools";
 
   src = fetchPypi {
-    sha256 = "1wdrdg2j16pmqhk0ify20s5pngijh7zc6hyxhh8w8v5k8v3pz5vk";
+    hash = "sha256-c5d/x0azbMQRhN1Dw/6BMj57iwbCuwgmxPWaIMVrufE=";
     inherit pname version;
   };
 
diff --git a/pkgs/development/python-modules/secp256k1/default.nix b/pkgs/development/python-modules/secp256k1/default.nix
index b806592383b3f..8aef9eceb9a2e 100644
--- a/pkgs/development/python-modules/secp256k1/default.nix
+++ b/pkgs/development/python-modules/secp256k1/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "82c06712d69ef945220c8b53c1a0d424c2ff6a1f64aee609030df79ad8383397";
+    hash = "sha256-gsBnEtae+UUiDItTwaDUJML/ah9kruYJAw33mtg4M5c=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/serpy/default.nix b/pkgs/development/python-modules/serpy/default.nix
index 9070acb5eae5b..cd3d7b79e9789 100644
--- a/pkgs/development/python-modules/serpy/default.nix
+++ b/pkgs/development/python-modules/serpy/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "3772b2a9923fbf674000ff51abebf6ea8f0fca0a2cfcbfa0d63ff118193d1ec5";
+    hash = "sha256-N3KyqZI/v2dAAP9Rq+v26o8Pygos/L+g1j/xGBk9HsU=";
   };
 
   propagatedBuildInputs = [ six ];
diff --git a/pkgs/development/python-modules/serverlessrepo/default.nix b/pkgs/development/python-modules/serverlessrepo/default.nix
index 39fce6c05da02..1dc4c68d56553 100644
--- a/pkgs/development/python-modules/serverlessrepo/default.nix
+++ b/pkgs/development/python-modules/serverlessrepo/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "671f48038123f121437b717ed51f253a55775590f00fbab6fbc6a01f8d05c017";
+    hash = "sha256-Zx9IA4Ej8SFDe3F+1R8lOlV3VZDwD7q2+8agH40FwBc=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/simplegeneric/default.nix b/pkgs/development/python-modules/simplegeneric/default.nix
index 274b0a6ebb02f..cd8514d5e4bb5 100644
--- a/pkgs/development/python-modules/simplegeneric/default.nix
+++ b/pkgs/development/python-modules/simplegeneric/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "dc972e06094b9af5b855b3df4a646395e43d1c9d0d39ed345b7393560d0b9173";
+    hash = "sha256-3JcuBglLmvW4VbPfSmRjleQ9HJ0NOe00W3OTVg0LkXM=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/simplekml/default.nix b/pkgs/development/python-modules/simplekml/default.nix
index 3b0a7b27845f2..9c566214803e4 100644
--- a/pkgs/development/python-modules/simplekml/default.nix
+++ b/pkgs/development/python-modules/simplekml/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "cda687be2754395fcab664e908ebf589facd41e8436d233d2be37a69efb1c536";
+    hash = "sha256-zaaHvidUOV/KtmTpCOv1ifrNQehDbSM9K+N6ae+xxTY=";
   };
 
   # no tests are defined in 1.3.5
diff --git a/pkgs/development/python-modules/sleepyq/default.nix b/pkgs/development/python-modules/sleepyq/default.nix
index 32d9c9ac39a82..b0ccfaceef729 100644
--- a/pkgs/development/python-modules/sleepyq/default.nix
+++ b/pkgs/development/python-modules/sleepyq/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1bhzrxpzglfw4qbqfzyxr7dmmavzq4pq0h90jh0aa8vdw7iy7g7v";
+    hash = "sha256-+7zj4+FtI6UAlCBBgC/Bf6ta28ndf4cXJtzR92/PH64=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/smbus-cffi/default.nix b/pkgs/development/python-modules/smbus-cffi/default.nix
index 7387d3478808f..2309bb2ce3827 100644
--- a/pkgs/development/python-modules/smbus-cffi/default.nix
+++ b/pkgs/development/python-modules/smbus-cffi/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "fb4195aaabfc01586863f60d3190b5cb1bf8f12622fd597e23e48768dad6bde8";
+    hash = "sha256-+0GVqqv8AVhoY/YNMZC1yxv48SYi/Vl+I+SHaNrWveg=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/smdebug-rulesconfig/default.nix b/pkgs/development/python-modules/smdebug-rulesconfig/default.nix
index 31656697d052b..ab4e41b884e1e 100644
--- a/pkgs/development/python-modules/smdebug-rulesconfig/default.nix
+++ b/pkgs/development/python-modules/smdebug-rulesconfig/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     inherit version;
     pname = "smdebug_rulesconfig";
-    sha256 = "1mpwjfvpmryqqwlbyf500584jclgm3vnxa740yyfzkvb5vmyc6bs";
+    hash = "sha256-ehnm6y5rz++8B+SobveojzJJUAGgOL8ox9jnereT/NY=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/snapshottest/default.nix b/pkgs/development/python-modules/snapshottest/default.nix
index f8f39d6687bc2..c8e12432be9cc 100644
--- a/pkgs/development/python-modules/snapshottest/default.nix
+++ b/pkgs/development/python-modules/snapshottest/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0g35ggqw4jd9zmazw55kj6gfjdghv49qx4jw5q231qyqj8fzijmv";
+    hash = "sha256-u8r4HZLY4zAELlySjhPZ8DXpnpGzFP5V/alJwvF7ZTw=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/sockjs-tornado/default.nix b/pkgs/development/python-modules/sockjs-tornado/default.nix
index 9e3b9f81e97dc..82e7678f05c4c 100644
--- a/pkgs/development/python-modules/sockjs-tornado/default.nix
+++ b/pkgs/development/python-modules/sockjs-tornado/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "02ff25466b3a46b1a7dbe477340b042770ac078de7ea475a6285a28a75eb1fab";
+    hash = "sha256-Av8lRms6RrGn2+R3NAsEJ3CsB43n6kdaYoWiinXrH6s=";
   };
 
   propagatedBuildInputs = [ tornado ];
diff --git a/pkgs/development/python-modules/socksipy-branch/default.nix b/pkgs/development/python-modules/socksipy-branch/default.nix
index 30d2a9bbdf21f..5f374bb899308 100644
--- a/pkgs/development/python-modules/socksipy-branch/default.nix
+++ b/pkgs/development/python-modules/socksipy-branch/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "SocksiPy-branch";
     inherit version;
-    sha256 = "01l41v4g7fy9fzvinmjxy6zcbhgqaif8dhdqm4w90fwcw9h51a8p";
+    hash = "sha256-F6lQYOKMO5A4qbjBhlxU+MHFvvFdVhv3d8m788gOhAY=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/speaklater/default.nix b/pkgs/development/python-modules/speaklater/default.nix
index 27f670f8a8d90..e93e393efc68e 100644
--- a/pkgs/development/python-modules/speaklater/default.nix
+++ b/pkgs/development/python-modules/speaklater/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1ab5dbfzzgz6cnz4xlwx79gz83id4bhiw67k1cgqrlzfs0va7zjr";
+    hash = "sha256-Wf6jNtDu04wfC/MYHuEiLQ70Xzqd006+Zea//91qZak=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/speaklater3/default.nix b/pkgs/development/python-modules/speaklater3/default.nix
index 4be3379c42ca9..59b6e19193508 100644
--- a/pkgs/development/python-modules/speaklater3/default.nix
+++ b/pkgs/development/python-modules/speaklater3/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ySYdS2taMEZyMS0esImb4Cj6yRdgGQqA/szTHTo7UEI=";
+    hash = "sha256-ySYdS2taMEZyMS0esImb4Cj6yRdgGQqA/szTHTo7UEI=";
   };
 
   pythonImportsCheck = [ "speaklater" ];
diff --git a/pkgs/development/python-modules/speedtest-cli/default.nix b/pkgs/development/python-modules/speedtest-cli/default.nix
index 86a36cf2d78e6..d2eac27002af0 100644
--- a/pkgs/development/python-modules/speedtest-cli/default.nix
+++ b/pkgs/development/python-modules/speedtest-cli/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1w4h7m0isbvfy4zx6m5j4594p5y4pjbpzsr0h4yzmdgd7hip69sy";
+    hash = "sha256-XidzIzzttfo9gSDrf5e8xJdLUiGyVNM/8W4vHUE9kPA=";
   };
 
   # tests require working internet connection
diff --git a/pkgs/development/python-modules/sphinx-comments/default.nix b/pkgs/development/python-modules/sphinx-comments/default.nix
index 217c084115b17..b5bf70c128fdc 100644
--- a/pkgs/development/python-modules/sphinx-comments/default.nix
+++ b/pkgs/development/python-modules/sphinx-comments/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "00170afff27019fad08e421da1ae49c681831fb2759786f07c826e89ac94cf21";
+    hash = "sha256-ABcK//JwGfrQjkIdoa5JxoGDH7J1l4bwfIJuiayUzyE=";
   };
 
   nativeBuildInputs = [ setuptools ];
diff --git a/pkgs/development/python-modules/sphinx-serve/default.nix b/pkgs/development/python-modules/sphinx-serve/default.nix
index e0798d6084034..67cacbb34f94b 100644
--- a/pkgs/development/python-modules/sphinx-serve/default.nix
+++ b/pkgs/development/python-modules/sphinx-serve/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "8d90f6595114108500b1f935d3f4d07bf5192783c67ce83f944ef289099669c9";
+    hash = "sha256-jZD2WVEUEIUAsfk10/TQe/UZJ4PGfOg/lE7yiQmWack=";
   };
 
   doCheck = false; # No tests
diff --git a/pkgs/development/python-modules/sphinx-testing/default.nix b/pkgs/development/python-modules/sphinx-testing/default.nix
index ec2f2055e3332..066436fc21d1f 100644
--- a/pkgs/development/python-modules/sphinx-testing/default.nix
+++ b/pkgs/development/python-modules/sphinx-testing/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ef661775b5722d7b00f67fc229104317d35637a4fb4434bf2c005afdf1da4d09";
+    hash = "sha256-72YXdbVyLXsA9n/CKRBDF9NWN6T7RDS/LABa/fHaTQk=";
   };
 
   nativeCheckInputs = [
diff --git a/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix b/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
index 51d3b8e199c95..9cdf52761f596 100644
--- a/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
+++ b/pkgs/development/python-modules/sphinxcontrib-blockdiag/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "aa49bf924516f5de8a479994c7be81e077df5599c9da2a082003d5b388e1d450";
+    hash = "sha256-qkm/kkUW9d6KR5mUx76B4HffVZnJ2ioIIAPVs4jh1FA=";
   };
 
   buildInputs = [
diff --git a/pkgs/development/python-modules/strategies/default.nix b/pkgs/development/python-modules/strategies/default.nix
index ec4fa4785830b..01eb3c3c92038 100644
--- a/pkgs/development/python-modules/strategies/default.nix
+++ b/pkgs/development/python-modules/strategies/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage (finalAttrs: {
   src = fetchPypi {
     pname = "strategies";
     inherit (finalAttrs) version;
-    sha256 = "02i4ydrs9k61p8iv2vl2akks8p9gc88rw8031wlwb1zqsyjmb328";
+    hash = "sha256-SIxVpdf4h8UpDwMgnhFiL12k51SCbrEjusHMpHPzJAo=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/strict-rfc3339/default.nix b/pkgs/development/python-modules/strict-rfc3339/default.nix
index 275fcd0e6104b..87364e77ac4a0 100644
--- a/pkgs/development/python-modules/strict-rfc3339/default.nix
+++ b/pkgs/development/python-modules/strict-rfc3339/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "5cad17bedfc3af57b399db0fed32771f18fc54bbd917e85546088607ac5e1277";
+    hash = "sha256-XK0Xvt/Dr1ezmdsP7TJ3Hxj8VLvZF+hVRgiGB6xeEnc=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/stytra/default.nix b/pkgs/development/python-modules/stytra/default.nix
index 6dd724a1e7986..19a53fbfcbb79 100644
--- a/pkgs/development/python-modules/stytra/default.nix
+++ b/pkgs/development/python-modules/stytra/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "aab9d07575ef599a9c0ae505656e3c03ec753462df3c15742f1f768f2b578f0a";
+    hash = "sha256-qrnQdXXvWZqcCuUFZW48A+x1NGLfPBV0Lx92jytXjwo=";
   };
 
   patches = [
diff --git a/pkgs/development/python-modules/telethon-session-sqlalchemy/default.nix b/pkgs/development/python-modules/telethon-session-sqlalchemy/default.nix
index 5e50ffe457201..dbf01956fbec3 100644
--- a/pkgs/development/python-modules/telethon-session-sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/telethon-session-sqlalchemy/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "f847c57302a102eb88e29ed95b8f4efa69582db2966fd806c21376b9a66ad4a8";
+    hash = "sha256-+EfFcwKhAuuI4p7ZW49O+mlYLbKWb9gGwhN2uaZq1Kg=";
   };
 
   propagatedBuildInputs = [ sqlalchemy ];
diff --git a/pkgs/development/python-modules/tensorboard-plugin-wit/default.nix b/pkgs/development/python-modules/tensorboard-plugin-wit/default.nix
index c68c9fe2e18a4..8be072c98aeae 100644
--- a/pkgs/development/python-modules/tensorboard-plugin-wit/default.nix
+++ b/pkgs/development/python-modules/tensorboard-plugin-wit/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
     inherit pname version;
     format = "wheel";
     python = "py3";
-    sha256 = "0nv855qm2fav70lndsrv810pqgg41sbmd70fk86wk18ih825yxzf";
+    hash = "sha256-7ndfBIIRhckNmg6cVpcO5D18QUA762YpOFs5UXEpaFs=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/terminaltables/default.nix b/pkgs/development/python-modules/terminaltables/default.nix
index 7dd13c858f80f..e9b6c323b8ef6 100644
--- a/pkgs/development/python-modules/terminaltables/default.nix
+++ b/pkgs/development/python-modules/terminaltables/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "ba6eca5cb5ba02bba4c9f4f985af80c54ec3dccf94cfcd190154386255e47543";
+    hash = "sha256-um7KXLW6ArukyfT5ha+AxU7D3M+Uz80ZAVQ4YlXkdUM=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/testing-common-database/default.nix b/pkgs/development/python-modules/testing-common-database/default.nix
index 8c7682aa333f8..b510592e1959f 100644
--- a/pkgs/development/python-modules/testing-common-database/default.nix
+++ b/pkgs/development/python-modules/testing-common-database/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0wvdv0frl7xib05sixjv9m6jywaa2wdhdhsqqdfk45akk2r80pcn";
+    hash = "sha256-ll2AsphTFTJdw1jDBhsXSnEvTU1b9qgLWLEfmh3YbXM=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/testscenarios/default.nix b/pkgs/development/python-modules/testscenarios/default.nix
index 7cc142fd2344b..f3ce5451d3da6 100644
--- a/pkgs/development/python-modules/testscenarios/default.nix
+++ b/pkgs/development/python-modules/testscenarios/default.nix
@@ -20,7 +20,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "c257cb6b90ea7e6f8fef3158121d430543412c9a87df30b5dde6ec8b9b57a2b6";
+    hash = "sha256-wlfLa5Dqfm+P7zFYEh1DBUNBLJqH3zC13ebsi5tXorY=";
   };
 
   postPatch = ''
diff --git a/pkgs/development/python-modules/text-unidecode/default.nix b/pkgs/development/python-modules/text-unidecode/default.nix
index cb8cd5bb8f3d0..b2dd0c3f83766 100644
--- a/pkgs/development/python-modules/text-unidecode/default.nix
+++ b/pkgs/development/python-modules/text-unidecode/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "bad6603bb14d279193107714b288be206cac565dfa49aa5b105294dd5c4aab93";
+    hash = "sha256-utZgO7FNJ5GTEHcUsoi+IGysVl36SapbEFKU3VxKq5M=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/tflearn/default.nix b/pkgs/development/python-modules/tflearn/default.nix
index 36e2953e0a84d..882eb608f063e 100644
--- a/pkgs/development/python-modules/tflearn/default.nix
+++ b/pkgs/development/python-modules/tflearn/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "818aa57667693810415dc203ba3f75f1541e931a8dc30b6e8b21563541a70388";
+    hash = "sha256-gYqldmdpOBBBXcIDuj918VQekxqNwwtuiyFWNUGnA4g=";
   };
 
   buildInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/threadloop/default.nix b/pkgs/development/python-modules/threadloop/default.nix
index d196d3274fe2c..33f8a57dc94d7 100644
--- a/pkgs/development/python-modules/threadloop/default.nix
+++ b/pkgs/development/python-modules/threadloop/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "8b180aac31013de13c2ad5c834819771992d350267bddb854613ae77ef571944";
+    hash = "sha256-ixgKrDEBPeE8KtXINIGXcZktNQJnvduFRhOud+9XGUQ=";
   };
 
   propagatedBuildInputs = [ tornado ];
diff --git a/pkgs/development/python-modules/tidyexc/default.nix b/pkgs/development/python-modules/tidyexc/default.nix
index f6892f76cd1ec..971f226bb03bf 100644
--- a/pkgs/development/python-modules/tidyexc/default.nix
+++ b/pkgs/development/python-modules/tidyexc/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1gl1jmihafawg7hvnn4xb20vd2x5qpvca0m1wr2gk0m2jj42yiq6";
+    hash = "sha256-BkcviJSigvlE5qECxfbFpYu2gVidWLvheVw5BWOVgb4=";
   };
 
   nativeBuildInputs = [ flit ];
diff --git a/pkgs/development/python-modules/timeout-decorator/default.nix b/pkgs/development/python-modules/timeout-decorator/default.nix
index 272001642a893..9971472638d6a 100644
--- a/pkgs/development/python-modules/timeout-decorator/default.nix
+++ b/pkgs/development/python-modules/timeout-decorator/default.nix
@@ -10,7 +10,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "6a2f2f58db1c5b24a2cc79de6345760377ad8bdc13813f5265f6c3e63d16b3d7";
+    hash = "sha256-ai8vWNscWySizHneY0V2A3eti9wTgT9SZfbD5j0Ws9c=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/tlslite/default.nix b/pkgs/development/python-modules/tlslite/default.nix
index 88e170587cc54..9142ad6c76531 100644
--- a/pkgs/development/python-modules/tlslite/default.nix
+++ b/pkgs/development/python-modules/tlslite/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "9b9a487694c239efea8cec4454a99a56ee1ae1a5f3af0858ccf8029e2ac2d42d";
+    hash = "sha256-m5pIdpTCOe/qjOxEVKmaVu4a4aXzrwhYzPgCnirC1C0=";
   };
 
   meta = {
diff --git a/pkgs/development/python-modules/toml/default.nix b/pkgs/development/python-modules/toml/default.nix
index 3c1483d936f41..01582ed87251e 100644
--- a/pkgs/development/python-modules/toml/default.nix
+++ b/pkgs/development/python-modules/toml/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b3bda1d108d5dd99f4a20d24d9c348e91c4db7ab1b749200bded2f839ccbe68f";
+    hash = "sha256-s72h0QjV3Zn0og0k2cNI6RxNt6sbdJIAve0vg5zL5o8=";
   };
 
   # This package has a test script (built for Travis) that involves a)
diff --git a/pkgs/development/python-modules/traceback2/default.nix b/pkgs/development/python-modules/traceback2/default.nix
index 008f7280b39e8..24c99db82e177 100644
--- a/pkgs/development/python-modules/traceback2/default.nix
+++ b/pkgs/development/python-modules/traceback2/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0c1h3jas1jp1fdbn9z2mrgn3jj0hw1x3yhnkxp7jw34q15xcdb05";
+    hash = "sha256-BazGegmYDC7P7dNCP3rgEEg57MtV/GRXc+HKoJUcMDA=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/treelog/default.nix b/pkgs/development/python-modules/treelog/default.nix
index c3140c16f81c1..3759ffe219213 100644
--- a/pkgs/development/python-modules/treelog/default.nix
+++ b/pkgs/development/python-modules/treelog/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "0hnivz4p4llky6djxgcsr9r3j4vr46mkjvp0ksybhpx0fsnhdi81";
+    hash = "sha256-AcUGrXagX7i8nuBuOasheRM5csqavS6b8ZNScsnf0UI=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/twiggy/default.nix b/pkgs/development/python-modules/twiggy/default.nix
index 3d50f8dcccee0..c56664fcff159 100644
--- a/pkgs/development/python-modules/twiggy/default.nix
+++ b/pkgs/development/python-modules/twiggy/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "Twiggy";
     inherit version;
-    sha256 = "7938840275972f6ce89994a5bdfb0b84f0386301a043a960af6364952e78ffe4";
+    hash = "sha256-eTiEAnWXL2zomZSlvfsLhPA4YwGgQ6lgr2NklS54/+Q=";
   };
 
   propagatedBuildInputs = [ six ];
diff --git a/pkgs/development/python-modules/twofish/default.nix b/pkgs/development/python-modules/twofish/default.nix
index e741b97d071de..b7686d8960b85 100644
--- a/pkgs/development/python-modules/twofish/default.nix
+++ b/pkgs/development/python-modules/twofish/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1yihp2n42amrxw0wk9f66llpb3w5kwhgkcdg9krkzcik1nsqp7dh";
+    hash = "sha256-sJ2LtQ0zsj/zTK+x+SCfhY91KTXGpckB77kqQay4MPo=";
   };
 
   propagatedBuildInputs = [ javaobj-py3 ];
diff --git a/pkgs/development/python-modules/txamqp/default.nix b/pkgs/development/python-modules/txamqp/default.nix
index eb2ff68a2b254..f9fa535f0a355 100644
--- a/pkgs/development/python-modules/txamqp/default.nix
+++ b/pkgs/development/python-modules/txamqp/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "txAMQP";
     inherit version;
-    sha256 = "0jd9864k3csc06kipiwzjlk9mq4054s8kzk5q1cfnxj8572s4iv4";
+    hash = "sha256-ZEeixSlIdutYwGX+iTQpgOCaJpWfxxunAUyzMYlBqUk=";
   };
 
   propagatedBuildInputs = [ twisted ];
diff --git a/pkgs/development/python-modules/txgithub/default.nix b/pkgs/development/python-modules/txgithub/default.nix
index 433b9cdbd58f6..23bd4a2329340 100644
--- a/pkgs/development/python-modules/txgithub/default.nix
+++ b/pkgs/development/python-modules/txgithub/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "16gbizy8vkxasxylwzj4p66yw8979nvzxdj6csidgmng7gi2k8nx";
+    hash = "sha256-3aIp4jvP1teiZka2/rdNJyHujblEfk5916rPjfyP65k=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/ukpostcodeparser/default.nix b/pkgs/development/python-modules/ukpostcodeparser/default.nix
index 9c3afe6c8917c..b362f6b7343d2 100644
--- a/pkgs/development/python-modules/ukpostcodeparser/default.nix
+++ b/pkgs/development/python-modules/ukpostcodeparser/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "UkPostcodeParser";
     inherit version;
-    sha256 = "930264efa293db80af0103a4fe9c161b06365598d24bb6fe5403f3f57c70530e";
+    hash = "sha256-kwJk76KT24CvAQOk/pwWGwY2VZjSS7b+VAPz9XxwUw4=";
   };
 
   doCheck = false;
diff --git a/pkgs/development/python-modules/umalqurra/default.nix b/pkgs/development/python-modules/umalqurra/default.nix
index 0dce7dc7ce968..b3667908a452c 100644
--- a/pkgs/development/python-modules/umalqurra/default.nix
+++ b/pkgs/development/python-modules/umalqurra/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "719f6a36f908ada1c29dae0d934dd0f1e1f6e3305784edbec23ad719397de678";
+    hash = "sha256-cZ9qNvkIraHCna4Nk03Q8eH24zBXhO2+wjrXGTl95ng=";
   };
 
   # No tests included
diff --git a/pkgs/development/python-modules/unidic-lite/default.nix b/pkgs/development/python-modules/unidic-lite/default.nix
index c2530aa943345..524a6dcdb79f4 100644
--- a/pkgs/development/python-modules/unidic-lite/default.nix
+++ b/pkgs/development/python-modules/unidic-lite/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "0idj4yp0sl27ylr2wzkybbh0wj7c843lp7cljw5d1m7xv5r4b7fv";
+    hash = "sha256-251Fctn91NAKl5SdSwdB7EgO4Fp+fi4y9UdQDa4nskU=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/unrpa/default.nix b/pkgs/development/python-modules/unrpa/default.nix
index 32d48882f8813..2c6a25792aa65 100644
--- a/pkgs/development/python-modules/unrpa/default.nix
+++ b/pkgs/development/python-modules/unrpa/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0yl4qdwp3in170ks98qnldqz3r2iyzil5g1775ccg98qkh95s724";
+    hash = "sha256-RBxdEpwYpcdYOSe8QuP3UeTxcaMWo6QnOMHGcXnDhHo=";
   };
 
   optional-dependencies = {
diff --git a/pkgs/development/python-modules/untokenize/default.nix b/pkgs/development/python-modules/untokenize/default.nix
index d20b84fd01deb..6b71c534c2491 100644
--- a/pkgs/development/python-modules/untokenize/default.nix
+++ b/pkgs/development/python-modules/untokenize/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "3865dbbbb8efb4bb5eaa72f1be7f3e0be00ea8b7f125c69cbd1f5fda926f37a2";
+    hash = "sha256-OGXbu7jvtLteqnLxvn8+C+AOqLfxJcacvR9f2pJvN6I=";
   };
 
   # the deprecated ast.Constant.s alias was removed in Python 3.14
diff --git a/pkgs/development/python-modules/uonet-request-signer-hebe/default.nix b/pkgs/development/python-modules/uonet-request-signer-hebe/default.nix
index 33e236f9adc34..5ceed5f2da7bc 100644
--- a/pkgs/development/python-modules/uonet-request-signer-hebe/default.nix
+++ b/pkgs/development/python-modules/uonet-request-signer-hebe/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "fidopnpAt5CXPsLbx+V8wrJCQQ/WIO6AqxpsYLDv8qM=";
+    hash = "sha256-fidopnpAt5CXPsLbx+V8wrJCQQ/WIO6AqxpsYLDv8qM=";
   };
 
   propagatedBuildInputs = [ pyopenssl ];
diff --git a/pkgs/development/python-modules/update-checker/default.nix b/pkgs/development/python-modules/update-checker/default.nix
index f6100125a88a1..ea2c1499c1bc0 100644
--- a/pkgs/development/python-modules/update-checker/default.nix
+++ b/pkgs/development/python-modules/update-checker/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "update_checker";
     inherit version;
-    sha256 = "6a2d45bb4ac585884a6b03f9eade9161cedd9e8111545141e9aa9058932acb13";
+    hash = "sha256-ai1Fu0rFhYhKawP56t6RYc7dnoERVFFB6aqQWJMqyxM=";
   };
 
   propagatedBuildInputs = [ requests ];
diff --git a/pkgs/development/python-modules/uptime-kuma-monitor/default.nix b/pkgs/development/python-modules/uptime-kuma-monitor/default.nix
index 643571fc0d760..a18a15cc6a70a 100644
--- a/pkgs/development/python-modules/uptime-kuma-monitor/default.nix
+++ b/pkgs/development/python-modules/uptime-kuma-monitor/default.nix
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchPypi {
     pname = "uptime_kuma_monitor";
     inherit version;
-    sha256 = "0zi4856hj5ar4yidh7366kx3xnh8qzydw9z8vlalcn98jf3jlnk9";
+    hash = "sha256-aVoqh5MoWUYV3egn3vzHCNo++jRmHNiiJ1kVCU1BJH4=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/urlgrabber/default.nix b/pkgs/development/python-modules/urlgrabber/default.nix
index 75c0fa5829bcd..eba7c586d6730 100644
--- a/pkgs/development/python-modules/urlgrabber/default.nix
+++ b/pkgs/development/python-modules/urlgrabber/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "075af8afabae6362482d254e5ac3ffa595d1766117b684e53d9c25c2e937e139";
+    hash = "sha256-B1r4r6uuY2JILSVOWsP/pZXRdmEXtoTlPZwlwuk34Tk=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/vidstab/default.nix b/pkgs/development/python-modules/vidstab/default.nix
index d216f69ac3bd1..df1945b34d3b6 100644
--- a/pkgs/development/python-modules/vidstab/default.nix
+++ b/pkgs/development/python-modules/vidstab/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "865c4a097e2a8527aa8bfc96ab0bcc0d280a88cc93eabcc36531268f5d343ce1";
+    hash = "sha256-hlxKCX4qhSeqi/yWqwvMDSgKiMyT6rzDZTEmj100POE=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/visitor/default.nix b/pkgs/development/python-modules/visitor/default.nix
index 0b27081fc8704..3558ce2fcad67 100644
--- a/pkgs/development/python-modules/visitor/default.nix
+++ b/pkgs/development/python-modules/visitor/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "02j87v93c50gz68gbgclmbqjcwcr7g7zgvk7c6y4x1mnn81pjwrc";
+    hash = "sha256-LHN5A7K2hk68YWfu9887mXEm8aqUvfWQ+Q8UNtI+SAo=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/web/default.nix b/pkgs/development/python-modules/web/default.nix
index b9c660082aaa7..02fb0a0c1cba1 100644
--- a/pkgs/development/python-modules/web/default.nix
+++ b/pkgs/development/python-modules/web/default.nix
@@ -19,7 +19,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "5ce684caa240654cae5950da8b4b7bc178812031e08f990518d072bd44ab525e";
+    hash = "sha256-XOaEyqJAZUyuWVDai0t7wXiBIDHgj5kFGNByvUSrUl4=";
   };
 
   propagatedBuildInputs = [
diff --git a/pkgs/development/python-modules/webencodings/default.nix b/pkgs/development/python-modules/webencodings/default.nix
index 334ba54b0ba5c..68aa95b9c3e29 100644
--- a/pkgs/development/python-modules/webencodings/default.nix
+++ b/pkgs/development/python-modules/webencodings/default.nix
@@ -12,7 +12,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "b36a1c245f2d304965eb4e0a82848379241dc04b865afcc4aab16748587e1923";
+    hash = "sha256-s2ocJF8tMEll604KgoSDeSQdwEuGWvzEqrFnSFh+GSM=";
   };
 
   nativeCheckInputs = [ pytest ];
diff --git a/pkgs/development/python-modules/wget/default.nix b/pkgs/development/python-modules/wget/default.nix
index 51dc2d9ce639c..8f9124280d5e8 100644
--- a/pkgs/development/python-modules/wget/default.nix
+++ b/pkgs/development/python-modules/wget/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "35e630eca2aa50ce998b9b1a127bb26b30dfee573702782aa982f875e3f16061";
+    hash = "sha256-NeYw7KKqUM6Zi5saEnuyazDf7lc3AngqqYL4dePxYGE=";
     extension = "zip";
   };
 
diff --git a/pkgs/development/python-modules/whichcraft/default.nix b/pkgs/development/python-modules/whichcraft/default.nix
index 56b0c55356d90..652f1574c5d0c 100644
--- a/pkgs/development/python-modules/whichcraft/default.nix
+++ b/pkgs/development/python-modules/whichcraft/default.nix
@@ -13,7 +13,7 @@ buildPythonPackage (finalAttrs: {
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
-    sha256 = "11yfkzyplizdgndy34vyd5qlmr1n5mxis3a3svxmx8fnccdvknxc";
+    hash = "sha256-rNu5G2PWoV771kMNHXstNuRKcWl+k+Gbfe1Hev2fzoc=";
   };
 
   build-system = [ setuptools ];
diff --git a/pkgs/development/python-modules/zerorpc/default.nix b/pkgs/development/python-modules/zerorpc/default.nix
index 1ee354d22bc4e..86beb58e8993a 100644
--- a/pkgs/development/python-modules/zerorpc/default.nix
+++ b/pkgs/development/python-modules/zerorpc/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "d2ee247a566fc703f29c277d767f6f61f1e12f76d0402faea4bd815f32cbf37f";
+    hash = "sha256-0u4kelZvxwPynCd9dn9vYfHhL3bQQC+upL2BXzLL838=";
   };
 
   propagatedBuildInputs = [