diff --git a/pkgs/development/python-modules/crc16/default.nix b/pkgs/development/python-modules/crc16/default.nix
index eda1987a5b07..6ef211c06fba 100644
--- a/pkgs/development/python-modules/crc16/default.nix
+++ b/pkgs/development/python-modules/crc16/default.nix
@@ -1,19 +1,34 @@
-{ lib, buildPythonPackage, fetchPypi }:
+{
+  lib,
+  buildPythonPackage,
+  fetchPypi,
+  setuptools,
+  pythonOlder,
+}:
 
 buildPythonPackage rec {
   pname = "crc16";
   version = "0.1.1";
-  format = "setuptools";
+  pyproject = true;
+
+  disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "15nkx0pa4lskwin84flpk8fsw3jqg6wic6v3s83syjqg76h6my61";
+    hash = "sha256-wfhqoDkPS68H0mMbFrl5WA6uHZqXOoJs5FNToi7o05Y=";
   };
 
+  build-system = [ setuptools ];
+
+  # Tests are outdated
+  doCheck = false;
+
+  pythonImportsCheck = [ "crc16" ];
+
   meta = with lib; {
-    homepage = "https://code.google.com/archive/p/pycrc16/";
     description = "Python library for calculating CRC16";
-    license = licenses.lgpl3;
+    homepage = "https://code.google.com/archive/p/pycrc16/";
+    license = licenses.lgpl3Plus;
     maintainers = with maintainers; [ abbradar ];
   };
 }
diff --git a/pkgs/development/python-modules/pyoppleio/default.nix b/pkgs/development/python-modules/pyoppleio/default.nix
index 4487647ca81d..b9ef0e23a73f 100644
--- a/pkgs/development/python-modules/pyoppleio/default.nix
+++ b/pkgs/development/python-modules/pyoppleio/default.nix
@@ -1,14 +1,16 @@
-{ lib
-, buildPythonPackage
-, crc16
-, fetchPypi
-, pythonOlder
+{
+  lib,
+  buildPythonPackage,
+  crc16,
+  fetchPypi,
+  pythonOlder,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "pyoppleio";
   version = "1.0.7";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -17,22 +19,20 @@ buildPythonPackage rec {
     hash = "sha256-S1w3pPqhX903kkXUq9ALz0+zRvNGOimLughRRVKjV8E=";
   };
 
-  propagatedBuildInputs = [
-    crc16
-  ];
+  build-system = [ setuptools ];
+
+  dependencies = [ crc16 ];
 
   # Module has no tests
   doCheck = false;
 
-  pythonImportsCheck = [
-    "pyoppleio"
-  ];
+  pythonImportsCheck = [ "pyoppleio" ];
 
   meta = with lib; {
     description = "Library for interacting with OPPLE lights";
-    mainProgram = "oppleio";
     homepage = "https://github.com/jedmeng/python-oppleio";
-    license = with licenses; [ asl20 ];
+    license = licenses.asl20;
     maintainers = with maintainers; [ fab ];
+    mainProgram = "oppleio";
   };
 }