diff --git a/pkgs/applications/editors/manuskript/default.nix b/pkgs/applications/editors/manuskript/default.nix
index f69d9eb177aa..f22ca6f7ee26 100644
--- a/pkgs/applications/editors/manuskript/default.nix
+++ b/pkgs/applications/editors/manuskript/default.nix
@@ -10,7 +10,7 @@ python3Packages.buildPythonApplication rec {
   pname = "manuskript";
   version = "0.17.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     repo = "manuskript";
diff --git a/pkgs/applications/misc/bluetooth_battery/default.nix b/pkgs/applications/misc/bluetooth_battery/default.nix
index bb78a4bb8655..af2339c7d797 100644
--- a/pkgs/applications/misc/bluetooth_battery/default.nix
+++ b/pkgs/applications/misc/bluetooth_battery/default.nix
@@ -18,7 +18,7 @@ buildPythonApplication rec {
 
   propagatedBuildInputs = [ pybluez ];
 
-  format = "other";
+  pyproject = false;
 
   installPhase = ''
     mkdir -p $out/bin
diff --git a/pkgs/applications/misc/dupeguru/default.nix b/pkgs/applications/misc/dupeguru/default.nix
index 62db4a697e92..9432ebdfcf4e 100644
--- a/pkgs/applications/misc/dupeguru/default.nix
+++ b/pkgs/applications/misc/dupeguru/default.nix
@@ -11,7 +11,7 @@ python3Packages.buildPythonApplication rec {
   pname = "dupeguru";
   version = "4.3.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "arsenetar";
diff --git a/pkgs/applications/misc/polychromatic/default.nix b/pkgs/applications/misc/polychromatic/default.nix
index a69a45b3a9b3..6c81de45df6d 100644
--- a/pkgs/applications/misc/polychromatic/default.nix
+++ b/pkgs/applications/misc/polychromatic/default.nix
@@ -19,7 +19,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "polychromatic";
   version = "0.9.3";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "polychromatic";
diff --git a/pkgs/applications/misc/sway-contrib/default.nix b/pkgs/applications/misc/sway-contrib/default.nix
index 34dc693e6680..3820935a9b67 100644
--- a/pkgs/applications/misc/sway-contrib/default.nix
+++ b/pkgs/applications/misc/sway-contrib/default.nix
@@ -100,7 +100,7 @@ in
 
       pname = "sway-${lname}";
 
-      format = "other";
+      pyproject = false;
       dontBuild = true;
       dontConfigure = true;
 
diff --git a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
index 65155aecce72..be2ca10be6a7 100644
--- a/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
+++ b/pkgs/applications/networking/irc/weechat/scripts/weechat-matrix/default.nix
@@ -70,7 +70,7 @@ buildPythonPackage {
   dontBuild = true;
   doCheck = false;
 
-  format = "other";
+  pyproject = false;
 
   installPhase = ''
     mkdir -p $out/share $out/bin
diff --git a/pkgs/applications/science/logic/easycrypt/runtest.nix b/pkgs/applications/science/logic/easycrypt/runtest.nix
index a8be8cc4868c..fb5fd183b1b6 100644
--- a/pkgs/applications/science/logic/easycrypt/runtest.nix
+++ b/pkgs/applications/science/logic/easycrypt/runtest.nix
@@ -2,7 +2,7 @@
 
 python3Packages.buildPythonApplication {
   inherit (easycrypt) src version;
-  format = "other";
+  pyproject = false;
 
   pname = "easycrypt-runtest";
 
diff --git a/pkgs/applications/window-managers/i3/wk-switch.nix b/pkgs/applications/window-managers/i3/wk-switch.nix
index f5fadf35bca4..bae72d0adb76 100644
--- a/pkgs/applications/window-managers/i3/wk-switch.nix
+++ b/pkgs/applications/window-managers/i3/wk-switch.nix
@@ -7,7 +7,7 @@
 python3Packages.buildPythonApplication {
   pname = "i3-wk-switch";
   version = "2020-03-18";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "tmfink";
diff --git a/pkgs/by-name/_2/_20kly/package.nix b/pkgs/by-name/_2/_20kly/package.nix
index ed0c204fc799..6060ce58d784 100644
--- a/pkgs/by-name/_2/_20kly/package.nix
+++ b/pkgs/by-name/_2/_20kly/package.nix
@@ -8,7 +8,7 @@ python3Packages.buildPythonApplication rec {
   pname = "20kly";
   version = "1.5.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "20kly";
diff --git a/pkgs/by-name/ac/accerciser/package.nix b/pkgs/by-name/ac/accerciser/package.nix
index bc41b5d9be94..69037284140f 100644
--- a/pkgs/by-name/ac/accerciser/package.nix
+++ b/pkgs/by-name/ac/accerciser/package.nix
@@ -21,7 +21,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "accerciser";
   version = "3.48.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/accerciser/${lib.versions.majorMinor version}/accerciser-${version}.tar.xz";
diff --git a/pkgs/by-name/ad/adcskiller/package.nix b/pkgs/by-name/ad/adcskiller/package.nix
index ffd59b2067bf..7e3a98567bb2 100644
--- a/pkgs/by-name/ad/adcskiller/package.nix
+++ b/pkgs/by-name/ad/adcskiller/package.nix
@@ -8,7 +8,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "adcskiller";
   version = "0-unstable-2024-05-19";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "grimlockx";
diff --git a/pkgs/by-name/ad/adenum/package.nix b/pkgs/by-name/ad/adenum/package.nix
index 92d93f660d7d..c44a4e2d37bf 100644
--- a/pkgs/by-name/ad/adenum/package.nix
+++ b/pkgs/by-name/ad/adenum/package.nix
@@ -8,7 +8,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "adenum";
   version = "0-unstable-2022-04-01";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "SecuProject";
diff --git a/pkgs/by-name/ad/adwsteamgtk/package.nix b/pkgs/by-name/ad/adwsteamgtk/package.nix
index 870949986859..ed7e3fc86d7a 100644
--- a/pkgs/by-name/ad/adwsteamgtk/package.nix
+++ b/pkgs/by-name/ad/adwsteamgtk/package.nix
@@ -15,7 +15,7 @@ python3Packages.buildPythonApplication rec {
   pname = "adwsteamgtk";
   version = "0.8.0";
   # built with meson, not a python format
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Foldex";
diff --git a/pkgs/by-name/al/alacarte/package.nix b/pkgs/by-name/al/alacarte/package.nix
index 0a0bf87c16ce..97ca3a85bd5e 100644
--- a/pkgs/by-name/al/alacarte/package.nix
+++ b/pkgs/by-name/al/alacarte/package.nix
@@ -27,7 +27,7 @@ python3.pkgs.buildPythonApplication rec {
     hash = "sha256-U3shnQ1GlDvOQFfjYVfAhCVRVQpTyLwEzHqKIbBChas=";
   };
 
-  format = "other";
+  pyproject = false;
 
   nativeBuildInputs = [
     autoconf
diff --git a/pkgs/by-name/an/analyze-build/package.nix b/pkgs/by-name/an/analyze-build/package.nix
index 7d4ec5845407..9c62df1d4552 100644
--- a/pkgs/by-name/an/analyze-build/package.nix
+++ b/pkgs/by-name/an/analyze-build/package.nix
@@ -10,7 +10,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "analyze-build";
   inherit (clang-unwrapped) version;
 
-  format = "other";
+  pyproject = false;
 
   src = clang-unwrapped + "/bin";
 
diff --git a/pkgs/by-name/an/anki/package.nix b/pkgs/by-name/an/anki/package.nix
index d4880fb4eefa..37fd06bb5cdd 100644
--- a/pkgs/by-name/an/anki/package.nix
+++ b/pkgs/by-name/an/anki/package.nix
@@ -100,7 +100,7 @@ let
 in
 
 python3Packages.buildPythonApplication rec {
-  format = "other";
+  pyproject = false;
   inherit pname version;
 
   outputs = [
diff --git a/pkgs/by-name/ap/apparmor-utils/package.nix b/pkgs/by-name/ap/apparmor-utils/package.nix
index c7f958887967..ea1c275bdeb3 100644
--- a/pkgs/by-name/ap/apparmor-utils/package.nix
+++ b/pkgs/by-name/ap/apparmor-utils/package.nix
@@ -36,7 +36,7 @@ python3Packages.buildPythonApplication {
     sed -i Makefile -e "/\<vim\>/d"
   '');
 
-  format = "other";
+  pyproject = false;
   strictDeps = true;
 
   doCheck = true;
diff --git a/pkgs/by-name/ar/arubaotp-seed-extractor/package.nix b/pkgs/by-name/ar/arubaotp-seed-extractor/package.nix
index b28fce2c7aff..09474578ee73 100644
--- a/pkgs/by-name/ar/arubaotp-seed-extractor/package.nix
+++ b/pkgs/by-name/ar/arubaotp-seed-extractor/package.nix
@@ -15,7 +15,7 @@ python3Packages.buildPythonApplication {
     hash = "sha256-1pv88OClskQOPtJaP7g0duXMe/X3M6Tk+ituZ9UxoIE=";
   };
 
-  format = "other";
+  pyproject = false;
 
   nativeBuildInputs = [
     python3Packages.wrapPython
diff --git a/pkgs/by-name/au/autorandr/package.nix b/pkgs/by-name/au/autorandr/package.nix
index 66c94165e587..527ef15b6765 100644
--- a/pkgs/by-name/au/autorandr/package.nix
+++ b/pkgs/by-name/au/autorandr/package.nix
@@ -12,7 +12,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "autorandr";
   version = "1.15";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "phillipberndt";
diff --git a/pkgs/by-name/az/azure-cli/python-packages.nix b/pkgs/by-name/az/azure-cli/python-packages.nix
index f93c6f4bcaf9..05ec49e28fc0 100644
--- a/pkgs/by-name/az/azure-cli/python-packages.nix
+++ b/pkgs/by-name/az/azure-cli/python-packages.nix
@@ -197,7 +197,7 @@ let
         pname = "azure-mgmt-resource-all";
         inherit version;
 
-        format = "other"; # we're not building from sdist/wheel
+        pyproject = false; # we're not building from sdist/wheel
 
         src = py.pkgs.azure-mgmt-resource.src;
 
diff --git a/pkgs/by-name/ba/bada-bib/package.nix b/pkgs/by-name/ba/bada-bib/package.nix
index ec986405b5d2..db5081f25753 100644
--- a/pkgs/by-name/ba/bada-bib/package.nix
+++ b/pkgs/by-name/ba/bada-bib/package.nix
@@ -21,7 +21,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "bada-bib";
   version = "0.8.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "RogerCrocker";
diff --git a/pkgs/by-name/bl/bleachbit/package.nix b/pkgs/by-name/bl/bleachbit/package.nix
index 7322594d351c..c4a805170c83 100644
--- a/pkgs/by-name/bl/bleachbit/package.nix
+++ b/pkgs/by-name/bl/bleachbit/package.nix
@@ -14,7 +14,7 @@ python3Packages.buildPythonApplication rec {
   pname = "bleachbit";
   version = "5.0.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://sourceforge/${pname}/${pname}-${version}.tar.bz2";
diff --git a/pkgs/by-name/bl/blueberry/package.nix b/pkgs/by-name/bl/blueberry/package.nix
index e0a55e730e00..9c0462c54985 100644
--- a/pkgs/by-name/bl/blueberry/package.nix
+++ b/pkgs/by-name/bl/blueberry/package.nix
@@ -16,7 +16,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "blueberry";
   version = "1.4.8";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "linuxmint";
diff --git a/pkgs/by-name/bo/bottles-unwrapped/package.nix b/pkgs/by-name/bo/bottles-unwrapped/package.nix
index 50008f517427..701bf8943681 100644
--- a/pkgs/by-name/bo/bottles-unwrapped/package.nix
+++ b/pkgs/by-name/bo/bottles-unwrapped/package.nix
@@ -115,7 +115,7 @@ python3Packages.buildPythonApplication rec {
       procps
     ];
 
-  format = "other";
+  pyproject = false;
   dontWrapGApps = true; # prevent double wrapping
 
   preFixup = ''
diff --git a/pkgs/by-name/br/broadlink-cli/package.nix b/pkgs/by-name/br/broadlink-cli/package.nix
index 59c901578856..6303273d8f1f 100644
--- a/pkgs/by-name/br/broadlink-cli/package.nix
+++ b/pkgs/by-name/br/broadlink-cli/package.nix
@@ -17,7 +17,7 @@ python3Packages.buildPythonApplication rec {
     sha256 = "sha256-fqhi4K8Ceh8Rs0ExteCfAuVfEamFjMCjCFm6DRAJDmI=";
   };
 
-  format = "other";
+  pyproject = false;
 
   propagatedBuildInputs = with python3Packages; [
     broadlink
diff --git a/pkgs/by-name/ca/caerbannog/package.nix b/pkgs/by-name/ca/caerbannog/package.nix
index ece5fd79700b..56cb36deb582 100644
--- a/pkgs/by-name/ca/caerbannog/package.nix
+++ b/pkgs/by-name/ca/caerbannog/package.nix
@@ -18,7 +18,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "caerbannog";
   version = "0.3";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromSourcehut {
     owner = "~craftyguy";
diff --git a/pkgs/by-name/ca/caffeine-ng/package.nix b/pkgs/by-name/ca/caffeine-ng/package.nix
index d166dc2297d0..4033294abba9 100644
--- a/pkgs/by-name/ca/caffeine-ng/package.nix
+++ b/pkgs/by-name/ca/caffeine-ng/package.nix
@@ -20,7 +20,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "caffeine-ng";
   version = "4.2.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitea {
     domain = "codeberg.org";
diff --git a/pkgs/by-name/cl/cloudhunter/package.nix b/pkgs/by-name/cl/cloudhunter/package.nix
index a175b24bfe41..320efc0fa033 100644
--- a/pkgs/by-name/cl/cloudhunter/package.nix
+++ b/pkgs/by-name/cl/cloudhunter/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "cloudhunter";
   version = "0.7.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "belane";
diff --git a/pkgs/by-name/co/coffeegrindsize/package.nix b/pkgs/by-name/co/coffeegrindsize/package.nix
index 466e7a64af29..1658212a3e15 100644
--- a/pkgs/by-name/co/coffeegrindsize/package.nix
+++ b/pkgs/by-name/co/coffeegrindsize/package.nix
@@ -9,7 +9,7 @@ python3.pkgs.buildPythonApplication {
   # no tags in the repo
   version = "0-unstable-2021-04-20";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "jgagneastro";
diff --git a/pkgs/by-name/co/conjure/package.nix b/pkgs/by-name/co/conjure/package.nix
index 4cf5f5cf93a9..fd17051a9ff7 100644
--- a/pkgs/by-name/co/conjure/package.nix
+++ b/pkgs/by-name/co/conjure/package.nix
@@ -16,7 +16,7 @@ python3Packages.buildPythonApplication rec {
   pname = "conjure";
   version = "0.1.2";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "nate-xyz";
diff --git a/pkgs/by-name/co/connman-notify/package.nix b/pkgs/by-name/co/connman-notify/package.nix
index 993e877b3c4d..370e7525aef8 100644
--- a/pkgs/by-name/co/connman-notify/package.nix
+++ b/pkgs/by-name/co/connman-notify/package.nix
@@ -18,7 +18,7 @@ python3Packages.buildPythonApplication {
     hash = "sha256-EsF+Ckjojnn2o5PCDIexKrNIYxcIM1CZUNaTEIwvq8w=";
   };
 
-  format = "other";
+  pyproject = false;
 
   nativeBuildInputs = [
     gobject-introspection
diff --git a/pkgs/by-name/co/countryguess/package.nix b/pkgs/by-name/co/countryguess/package.nix
index 36982553f788..1363ab91d30e 100644
--- a/pkgs/by-name/co/countryguess/package.nix
+++ b/pkgs/by-name/co/countryguess/package.nix
@@ -10,7 +10,7 @@ python3Packages.buildPythonApplication {
   version = "0-unstable-2025-03-04";
   # upstream pyproject.toml is nonsense. Copied from another project
   # without customizing it for this project.
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "swarbler";
diff --git a/pkgs/by-name/cu/cups-drv-rastertosag-gdi/package.nix b/pkgs/by-name/cu/cups-drv-rastertosag-gdi/package.nix
index bedf2d8a4340..c7a0130f3925 100644
--- a/pkgs/by-name/cu/cups-drv-rastertosag-gdi/package.nix
+++ b/pkgs/by-name/cu/cups-drv-rastertosag-gdi/package.nix
@@ -21,7 +21,7 @@ python3Packages.buildPythonApplication rec {
       sha256 = "1l3xbrs67025595k9ba5794q3s74anizpbxwsshcfhmbrzd9h8hg";
     })
   ];
-  format = "other";
+  pyproject = false;
   nativeBuildInputs = [
     (lib.getBin cups)
     patchPpdFilesHook
diff --git a/pkgs/by-name/cu/curtail/package.nix b/pkgs/by-name/cu/curtail/package.nix
index eb203b08080f..d3793647a1cb 100644
--- a/pkgs/by-name/cu/curtail/package.nix
+++ b/pkgs/by-name/cu/curtail/package.nix
@@ -23,7 +23,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "curtail";
   version = "1.14.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Huluti";
diff --git a/pkgs/by-name/db/dbmonster/package.nix b/pkgs/by-name/db/dbmonster/package.nix
index 4dc4d4be1497..c0c213a9f05a 100644
--- a/pkgs/by-name/db/dbmonster/package.nix
+++ b/pkgs/by-name/db/dbmonster/package.nix
@@ -12,7 +12,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "dbmonster";
   version = "0-unstable-2022-09-17";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "90N45-d3v";
diff --git a/pkgs/by-name/de/decode-spam-headers/package.nix b/pkgs/by-name/de/decode-spam-headers/package.nix
index 4f10552d25f7..4baec38c5c56 100644
--- a/pkgs/by-name/de/decode-spam-headers/package.nix
+++ b/pkgs/by-name/de/decode-spam-headers/package.nix
@@ -16,7 +16,7 @@ python3Packages.buildPythonApplication rec {
     sha256 = "sha256-gBDkvlZCndQjochn6TZtM/Lanza64LqMjNnLjn+pPR4=";
   };
 
-  format = "other";
+  pyproject = false;
 
   outputs = [
     "out"
diff --git a/pkgs/by-name/de/densify/package.nix b/pkgs/by-name/de/densify/package.nix
index 5affbd4fc99f..0cac63030e5c 100644
--- a/pkgs/by-name/de/densify/package.nix
+++ b/pkgs/by-name/de/densify/package.nix
@@ -14,7 +14,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "densify";
   version = "0.3.2";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "hkdb";
diff --git a/pkgs/by-name/di/diffuse/package.nix b/pkgs/by-name/di/diffuse/package.nix
index 446ba4e94dee..ab6e4bdab899 100644
--- a/pkgs/by-name/di/diffuse/package.nix
+++ b/pkgs/by-name/di/diffuse/package.nix
@@ -26,7 +26,7 @@ python3.pkgs.buildPythonApplication rec {
     sha256 = "Svt+llBwJKGXRJZ96dzzdzpL/5jrzXXM/FPZwA7Es8s=";
   };
 
-  format = "other";
+  pyproject = false;
 
   nativeBuildInputs = [
     wrapGAppsHook3
diff --git a/pkgs/by-name/di/discord-rich-presence-plex/package.nix b/pkgs/by-name/di/discord-rich-presence-plex/package.nix
index 2c9f3a73e6df..9540b1385208 100644
--- a/pkgs/by-name/di/discord-rich-presence-plex/package.nix
+++ b/pkgs/by-name/di/discord-rich-presence-plex/package.nix
@@ -9,7 +9,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "discord-rich-presence-plex";
   version = "2.16.0";
-  format = "other";
+  pyproject = false;
   src = fetchFromGitHub {
     owner = "phin05";
     repo = "discord-rich-presence-plex";
diff --git a/pkgs/by-name/dr/drawing/package.nix b/pkgs/by-name/dr/drawing/package.nix
index c42420618191..09ff89472f77 100644
--- a/pkgs/by-name/dr/drawing/package.nix
+++ b/pkgs/by-name/dr/drawing/package.nix
@@ -21,7 +21,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "drawing";
   version = "1.0.2";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "maoschanz";
diff --git a/pkgs/by-name/dy/dynamic-wallpaper/package.nix b/pkgs/by-name/dy/dynamic-wallpaper/package.nix
index a2ed7a03b4d2..2fc321f20d5d 100644
--- a/pkgs/by-name/dy/dynamic-wallpaper/package.nix
+++ b/pkgs/by-name/dy/dynamic-wallpaper/package.nix
@@ -18,7 +18,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "dynamic-wallpaper";
   version = "0.1.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "dusansimic";
diff --git a/pkgs/by-name/ea/eartag/package.nix b/pkgs/by-name/ea/eartag/package.nix
index 57f45d8cc684..328a10d45736 100644
--- a/pkgs/by-name/ea/eartag/package.nix
+++ b/pkgs/by-name/ea/eartag/package.nix
@@ -23,7 +23,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "eartag";
   version = "1.0.2";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitLab {
     domain = "gitlab.gnome.org";
diff --git a/pkgs/by-name/ea/easyabc/package.nix b/pkgs/by-name/ea/easyabc/package.nix
index c04a26d20483..47be8da95473 100644
--- a/pkgs/by-name/ea/easyabc/package.nix
+++ b/pkgs/by-name/ea/easyabc/package.nix
@@ -14,7 +14,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "easyabc";
   version = "1.3.8.7-unstable-2025-01-12";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "jwdj";
diff --git a/pkgs/by-name/ey/eyewitness/package.nix b/pkgs/by-name/ey/eyewitness/package.nix
index a62b9e9219f0..dbc3f48d0d65 100644
--- a/pkgs/by-name/ey/eyewitness/package.nix
+++ b/pkgs/by-name/ey/eyewitness/package.nix
@@ -11,7 +11,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "eye-witness";
   version = "20230525.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "redsiege";
diff --git a/pkgs/by-name/fr/frigate/package.nix b/pkgs/by-name/fr/frigate/package.nix
index 0985e429d422..2ecb7c5b655d 100644
--- a/pkgs/by-name/fr/frigate/package.nix
+++ b/pkgs/by-name/fr/frigate/package.nix
@@ -77,7 +77,7 @@ in
 python3Packages.buildPythonApplication rec {
   pname = "frigate";
   inherit version;
-  format = "other";
+  pyproject = false;
 
   inherit src;
 
diff --git a/pkgs/by-name/gi/gi-docgen/package.nix b/pkgs/by-name/gi/gi-docgen/package.nix
index 6608c40baa23..7053bcd87800 100644
--- a/pkgs/by-name/gi/gi-docgen/package.nix
+++ b/pkgs/by-name/gi/gi-docgen/package.nix
@@ -11,7 +11,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "gi-docgen";
   version = "2025.5";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/gi-docgen/${lib.versions.major version}/gi-docgen-${version}.tar.xz";
diff --git a/pkgs/by-name/gi/giara/package.nix b/pkgs/by-name/gi/giara/package.nix
index 3dabca8470a6..9f4c2aa48c4a 100644
--- a/pkgs/by-name/gi/giara/package.nix
+++ b/pkgs/by-name/gi/giara/package.nix
@@ -20,7 +20,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "giara";
   version = "1.1.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitLab {
     domain = "gitlab.gnome.org";
diff --git a/pkgs/by-name/gn/gnome-browser-connector/package.nix b/pkgs/by-name/gn/gnome-browser-connector/package.nix
index 08f526a7e70c..88c5f14ae6c5 100644
--- a/pkgs/by-name/gn/gnome-browser-connector/package.nix
+++ b/pkgs/by-name/gn/gnome-browser-connector/package.nix
@@ -17,7 +17,7 @@ buildPythonApplication rec {
   pname = "gnome-browser-connector";
   version = "42.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/gnome-browser-connector/${lib.versions.major version}/gnome-browser-connector-${version}.tar.xz";
diff --git a/pkgs/by-name/gn/gnome-doc-utils/package.nix b/pkgs/by-name/gn/gnome-doc-utils/package.nix
index 66f944784b55..a0f7db1ea95c 100644
--- a/pkgs/by-name/gn/gnome-doc-utils/package.nix
+++ b/pkgs/by-name/gn/gnome-doc-utils/package.nix
@@ -15,7 +15,7 @@ python3Packages.buildPythonApplication rec {
   pname = "gnome-doc-utils";
   version = "0.20.10";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
diff --git a/pkgs/by-name/gn/gnome-frog/package.nix b/pkgs/by-name/gn/gnome-frog/package.nix
index cca5e1348415..752a4529cf2e 100644
--- a/pkgs/by-name/gn/gnome-frog/package.nix
+++ b/pkgs/by-name/gn/gnome-frog/package.nix
@@ -33,7 +33,7 @@ python3Packages.buildPythonApplication rec {
     sha256 = "sha256-p1gqom9saNEIm6FXinEuIJtMGwjGfQx9uLpR2kb46Uw=";
   };
 
-  format = "other";
+  pyproject = false;
 
   patches = [ ./update-compatible-with-non-flatpak-env.patch ];
   postPatch = ''
diff --git a/pkgs/by-name/gn/gnome-music/package.nix b/pkgs/by-name/gn/gnome-music/package.nix
index dbe454480e8b..5c670f544430 100644
--- a/pkgs/by-name/gn/gnome-music/package.nix
+++ b/pkgs/by-name/gn/gnome-music/package.nix
@@ -33,7 +33,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "gnome-music";
   version = "49.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/gnome-music/${lib.versions.major version}/gnome-music-${version}.tar.xz";
diff --git a/pkgs/by-name/gn/gnome-tweaks/package.nix b/pkgs/by-name/gn/gnome-tweaks/package.nix
index e23bdded212b..3e4afc36e2f1 100644
--- a/pkgs/by-name/gn/gnome-tweaks/package.nix
+++ b/pkgs/by-name/gn/gnome-tweaks/package.nix
@@ -29,7 +29,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "gnome-tweaks";
   version = "49.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/${pname}/${lib.versions.major version}/${pname}-${version}.tar.xz";
diff --git a/pkgs/by-name/gp/gpodder/package.nix b/pkgs/by-name/gp/gpodder/package.nix
index bf4ed943a8d4..d20a60b00450 100644
--- a/pkgs/by-name/gp/gpodder/package.nix
+++ b/pkgs/by-name/gp/gpodder/package.nix
@@ -14,7 +14,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "gpodder";
   version = "3.11.5";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "gpodder";
diff --git a/pkgs/by-name/gr/graphw00f/package.nix b/pkgs/by-name/gr/graphw00f/package.nix
index 51cc7b97f859..2ae38d6fd772 100644
--- a/pkgs/by-name/gr/graphw00f/package.nix
+++ b/pkgs/by-name/gr/graphw00f/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "graphw00f";
   version = "1.2.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "dolevf";
diff --git a/pkgs/by-name/gr/grc/package.nix b/pkgs/by-name/gr/grc/package.nix
index d5a7dc67a3e8..3483916652e1 100644
--- a/pkgs/by-name/gr/grc/package.nix
+++ b/pkgs/by-name/gr/grc/package.nix
@@ -8,7 +8,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "grc";
   version = "1.13";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "garabik";
diff --git a/pkgs/by-name/gt/gtg/package.nix b/pkgs/by-name/gt/gtg/package.nix
index 3a3a6cf8ec7f..4dc3788c8d1a 100644
--- a/pkgs/by-name/gt/gtg/package.nix
+++ b/pkgs/by-name/gt/gtg/package.nix
@@ -75,7 +75,7 @@ python3Packages.buildPythonApplication rec {
     export HOME="$TMP"
   '';
 
-  format = "other";
+  pyproject = false;
 
   checkPhase = "xvfb-run pytest ../tests/";
 
diff --git a/pkgs/by-name/gt/gtk-doc/package.nix b/pkgs/by-name/gt/gtk-doc/package.nix
index 518480223472..a2db2fee4788 100644
--- a/pkgs/by-name/gt/gtk-doc/package.nix
+++ b/pkgs/by-name/gt/gtk-doc/package.nix
@@ -20,7 +20,7 @@ python3.pkgs.buildPythonApplication rec {
 
   outputDevdoc = "out";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitLab {
     domain = "gitlab.gnome.org";
diff --git a/pkgs/by-name/gy/gyb/package.nix b/pkgs/by-name/gy/gyb/package.nix
index 6f8791875b84..aecb687f92cb 100644
--- a/pkgs/by-name/gy/gyb/package.nix
+++ b/pkgs/by-name/gy/gyb/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "gyb";
   version = "1.95";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "GAM-team";
diff --git a/pkgs/by-name/ha/halftone/package.nix b/pkgs/by-name/ha/halftone/package.nix
index a7771a4571d3..8df89d8725af 100644
--- a/pkgs/by-name/ha/halftone/package.nix
+++ b/pkgs/by-name/ha/halftone/package.nix
@@ -25,7 +25,7 @@ python3Packages.buildPythonApplication rec {
     hash = "sha256-5hT6ulmUlOrFVL4nV0tfvgkKdYGusp+1rBINQy3ZvpI=";
   };
 
-  format = "other";
+  pyproject = false;
   dontWrapGApps = true;
 
   nativeBuildInputs = [
diff --git a/pkgs/by-name/ha/hamster/package.nix b/pkgs/by-name/ha/hamster/package.nix
index 5556b28beb61..edd963ee9b5c 100644
--- a/pkgs/by-name/ha/hamster/package.nix
+++ b/pkgs/by-name/ha/hamster/package.nix
@@ -18,7 +18,7 @@ python3Packages.buildPythonApplication rec {
   pname = "hamster";
   version = "3.0.3";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "projecthamster";
diff --git a/pkgs/by-name/ha/hash-identifier/package.nix b/pkgs/by-name/ha/hash-identifier/package.nix
index 801a07864443..f54872cbe31c 100644
--- a/pkgs/by-name/ha/hash-identifier/package.nix
+++ b/pkgs/by-name/ha/hash-identifier/package.nix
@@ -15,7 +15,7 @@ python3Packages.buildPythonApplication rec {
     sha256 = "1amz48ijwjjkccg6gmdn3ffnyp2p52ksagy4m9gy8l2v5wj3j32h";
   };
 
-  format = "other"; # no setup.py
+  pyproject = false; # no setup.py
 
   installPhase = ''
     install -Dm0775 hash-id.py $out/bin/hash-identifier
diff --git a/pkgs/by-name/he/headphones/package.nix b/pkgs/by-name/he/headphones/package.nix
index 9f8a4205073a..faed47f89134 100644
--- a/pkgs/by-name/he/headphones/package.nix
+++ b/pkgs/by-name/he/headphones/package.nix
@@ -8,7 +8,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "headphones";
   version = "0.6.4";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "rembo10";
diff --git a/pkgs/by-name/he/healthchecks/package.nix b/pkgs/by-name/he/healthchecks/package.nix
index 16a382e398b7..d83868d75562 100644
--- a/pkgs/by-name/he/healthchecks/package.nix
+++ b/pkgs/by-name/he/healthchecks/package.nix
@@ -16,7 +16,7 @@ in
 py.pkgs.buildPythonApplication rec {
   pname = "healthchecks";
   version = "3.11.2";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "healthchecks";
diff --git a/pkgs/by-name/hp/hplip/package.nix b/pkgs/by-name/hp/hplip/package.nix
index 57065682b7f6..f0e1896d2db6 100644
--- a/pkgs/by-name/hp/hplip/package.nix
+++ b/pkgs/by-name/hp/hplip/package.nix
@@ -74,7 +74,7 @@ in
 
 python3Packages.buildPythonApplication {
   inherit pname version;
-  format = "other";
+  pyproject = false;
 
   srcs = [ src ] ++ lib.optional withPlugin plugin;
 
diff --git a/pkgs/by-name/hy/hydrus/package.nix b/pkgs/by-name/hy/hydrus/package.nix
index 79636cbd3399..9e00b503e5d7 100644
--- a/pkgs/by-name/hy/hydrus/package.nix
+++ b/pkgs/by-name/hy/hydrus/package.nix
@@ -17,7 +17,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "hydrus";
   version = "653";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "hydrusnetwork";
diff --git a/pkgs/by-name/ic/iceshelf/package.nix b/pkgs/by-name/ic/iceshelf/package.nix
index a8f53ea46d8d..9d60abeb616e 100644
--- a/pkgs/by-name/ic/iceshelf/package.nix
+++ b/pkgs/by-name/ic/iceshelf/package.nix
@@ -10,7 +10,7 @@ python3.pkgs.buildPythonApplication {
   pname = "iceshelf";
   version = "0-unstable-2019-07-03";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "mrworf";
diff --git a/pkgs/by-name/in/inspector/package.nix b/pkgs/by-name/in/inspector/package.nix
index c9d0957f7225..ac6cf72728fd 100644
--- a/pkgs/by-name/in/inspector/package.nix
+++ b/pkgs/by-name/in/inspector/package.nix
@@ -20,7 +20,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "inspector";
   version = "0.2.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Nokse22";
diff --git a/pkgs/by-name/in/intercept-build/package.nix b/pkgs/by-name/in/intercept-build/package.nix
index 0188b28aecc4..2f396e2e5596 100644
--- a/pkgs/by-name/in/intercept-build/package.nix
+++ b/pkgs/by-name/in/intercept-build/package.nix
@@ -10,7 +10,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "intercept-build";
   inherit (clang-unwrapped) version;
 
-  format = "other";
+  pyproject = false;
 
   src = clang-unwrapped + "/bin";
 
diff --git a/pkgs/by-name/ke/keyd/package.nix b/pkgs/by-name/ke/keyd/package.nix
index 44cfc0eba9f6..406f3d2fe3c5 100644
--- a/pkgs/by-name/ke/keyd/package.nix
+++ b/pkgs/by-name/ke/keyd/package.nix
@@ -23,7 +23,7 @@ let
   appMap = pypkgs.buildPythonApplication rec {
     pname = "keyd-application-mapper";
     inherit version src;
-    format = "other";
+    pyproject = false;
 
     postPatch = ''
       substituteInPlace scripts/${pname} \
diff --git a/pkgs/by-name/ki/kitty/package.nix b/pkgs/by-name/ki/kitty/package.nix
index ddee1cea3dd6..4099e27c8c16 100644
--- a/pkgs/by-name/ki/kitty/package.nix
+++ b/pkgs/by-name/ki/kitty/package.nix
@@ -52,7 +52,7 @@ with python3Packages;
 buildPythonApplication rec {
   pname = "kitty";
   version = "0.45.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "kovidgoyal";
diff --git a/pkgs/by-name/kl/klipperscreen/package.nix b/pkgs/by-name/kl/klipperscreen/package.nix
index 1efab9c2182e..8c02245fa9ab 100644
--- a/pkgs/by-name/kl/klipperscreen/package.nix
+++ b/pkgs/by-name/kl/klipperscreen/package.nix
@@ -9,7 +9,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "KlipperScreen";
   version = "0.4.5";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "KlipperScreen";
diff --git a/pkgs/by-name/ku/kupfer/package.nix b/pkgs/by-name/ku/kupfer/package.nix
index 07c1250dd9e8..98382a556903 100644
--- a/pkgs/by-name/ku/kupfer/package.nix
+++ b/pkgs/by-name/ku/kupfer/package.nix
@@ -22,7 +22,7 @@ buildPythonApplication rec {
   pname = "kupfer";
   version = "329";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "https://github.com/kupferlauncher/kupfer/releases/download/v${version}/kupfer-v${version}.tar.xz";
diff --git a/pkgs/by-name/ld/ldapmonitor/package.nix b/pkgs/by-name/ld/ldapmonitor/package.nix
index 1aec07adfad4..7ac10e282eb9 100644
--- a/pkgs/by-name/ld/ldapmonitor/package.nix
+++ b/pkgs/by-name/ld/ldapmonitor/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "ldapmonitor";
   version = "1.4";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "p0dalirius";
diff --git a/pkgs/by-name/li/lichess-bot/package.nix b/pkgs/by-name/li/lichess-bot/package.nix
index 409d61f98502..4f0326d14a03 100644
--- a/pkgs/by-name/li/lichess-bot/package.nix
+++ b/pkgs/by-name/li/lichess-bot/package.nix
@@ -7,7 +7,7 @@
 python3Packages.buildPythonApplication {
   pname = "lichess-bot";
   version = "2025.12.23.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "lichess-bot-devs";
diff --git a/pkgs/by-name/lo/logmap/package.nix b/pkgs/by-name/lo/logmap/package.nix
index a7045c8092bf..b195c3b32e6f 100644
--- a/pkgs/by-name/lo/logmap/package.nix
+++ b/pkgs/by-name/lo/logmap/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "logmap";
   version = "0-unstable-2021-12-15";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "zhzyker";
diff --git a/pkgs/by-name/lo/lollypop/package.nix b/pkgs/by-name/lo/lollypop/package.nix
index 32fbea586e43..9555df4c49fb 100644
--- a/pkgs/by-name/lo/lollypop/package.nix
+++ b/pkgs/by-name/lo/lollypop/package.nix
@@ -30,7 +30,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "lollypop";
   version = "1.4.40";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitLab {
     domain = "gitlab.gnome.org";
diff --git a/pkgs/by-name/lu/lutris-unwrapped/package.nix b/pkgs/by-name/lu/lutris-unwrapped/package.nix
index a701967a14ae..19a28e40ba6c 100644
--- a/pkgs/by-name/lu/lutris-unwrapped/package.nix
+++ b/pkgs/by-name/lu/lutris-unwrapped/package.nix
@@ -71,7 +71,7 @@ python3Packages.buildPythonApplication rec {
     hash = "sha256-CAXKnx5+60MITRM8enkYgFl5ZKM6HCXhCYNyG7kHhuQ=";
   };
 
-  format = "other";
+  pyproject = false;
 
   nativeBuildInputs = [
     appstream-glib
diff --git a/pkgs/by-name/ly/lyrebird/package.nix b/pkgs/by-name/ly/lyrebird/package.nix
index 405e8352697e..80e7524e15d2 100644
--- a/pkgs/by-name/ly/lyrebird/package.nix
+++ b/pkgs/by-name/ly/lyrebird/package.nix
@@ -26,7 +26,7 @@ python3Packages.buildPythonApplication rec {
   pname = "lyrebird";
   version = "1.2.0";
 
-  format = "other";
+  pyproject = false;
   doCheck = false;
 
   src = fetchFromGitHub {
diff --git a/pkgs/by-name/me/meld/package.nix b/pkgs/by-name/me/meld/package.nix
index 49ebf4782d93..b7d0a1e19421 100644
--- a/pkgs/by-name/me/meld/package.nix
+++ b/pkgs/by-name/me/meld/package.nix
@@ -24,7 +24,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "meld";
   version = "3.23.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/meld/${lib.versions.majorMinor version}/meld-${version}.tar.xz";
diff --git a/pkgs/by-name/me/menumaker/package.nix b/pkgs/by-name/me/menumaker/package.nix
index 996284f0dff0..983aea317624 100644
--- a/pkgs/by-name/me/menumaker/package.nix
+++ b/pkgs/by-name/me/menumaker/package.nix
@@ -13,7 +13,7 @@ python3Packages.buildPythonApplication rec {
     sha256 = "sha256-JBXs5hnt1snbnB1hi7q7HBI7rNp0OoalLeIM0uJCdkE=";
   };
 
-  format = "other";
+  pyproject = false;
 
   meta = {
     description = "Heuristics-driven menu generator for several window managers";
diff --git a/pkgs/by-name/me/mercurial/package.nix b/pkgs/by-name/me/mercurial/package.nix
index fc624c5e238e..3475132f885f 100644
--- a/pkgs/by-name/me/mercurial/package.nix
+++ b/pkgs/by-name/me/mercurial/package.nix
@@ -47,7 +47,7 @@ let
       hash = "sha256-6NkgyDw4xHXY6XO+YHYKSdw1w3ldZL1oduVq26Yi5cs=";
     };
 
-    format = "other";
+    pyproject = false;
 
     passthru = { inherit python; }; # pass it so that the same version can be used in hg2git
 
diff --git a/pkgs/by-name/mp/mpdris2/package.nix b/pkgs/by-name/mp/mpdris2/package.nix
index 1c9f86d267f6..84fcb9e4f0fd 100644
--- a/pkgs/by-name/mp/mpdris2/package.nix
+++ b/pkgs/by-name/mp/mpdris2/package.nix
@@ -14,7 +14,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "mpDris2";
   version = "0.9.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "eonpatapon";
diff --git a/pkgs/by-name/ms/msldapdump/package.nix b/pkgs/by-name/ms/msldapdump/package.nix
index 49fa39269641..e732cbd677cc 100644
--- a/pkgs/by-name/ms/msldapdump/package.nix
+++ b/pkgs/by-name/ms/msldapdump/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "msldapdump";
   version = "0-unstable-2023-06-12";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "dievus";
diff --git a/pkgs/by-name/my/mypaint/package.nix b/pkgs/by-name/my/mypaint/package.nix
index a5473c7adf8d..6c48bd9e6e38 100644
--- a/pkgs/by-name/my/mypaint/package.nix
+++ b/pkgs/by-name/my/mypaint/package.nix
@@ -30,7 +30,7 @@ in
 buildPythonApplication rec {
   pname = "mypaint";
   version = "2.0.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "mypaint";
diff --git a/pkgs/by-name/ne/nerd-font-patcher/package.nix b/pkgs/by-name/ne/nerd-font-patcher/package.nix
index 1d94eed16734..5711b1bff2e7 100644
--- a/pkgs/by-name/ne/nerd-font-patcher/package.nix
+++ b/pkgs/by-name/ne/nerd-font-patcher/package.nix
@@ -16,7 +16,7 @@ python3Packages.buildPythonApplication rec {
 
   propagatedBuildInputs = with python3Packages; [ fontforge ];
 
-  format = "other";
+  pyproject = false;
 
   patches = [
     ./use-nix-paths.patch
diff --git a/pkgs/by-name/ne/netbox_4_2/package.nix b/pkgs/by-name/ne/netbox_4_2/package.nix
index e17cd2c629c8..ec7d07d0b243 100644
--- a/pkgs/by-name/ne/netbox_4_2/package.nix
+++ b/pkgs/by-name/ne/netbox_4_2/package.nix
@@ -17,7 +17,7 @@ py.pkgs.buildPythonApplication rec {
   pname = "netbox";
   version = "4.2.9";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "netbox-community";
diff --git a/pkgs/by-name/ne/networkd-notify/package.nix b/pkgs/by-name/ne/networkd-notify/package.nix
index d98f906563ec..435e251bbc1c 100644
--- a/pkgs/by-name/ne/networkd-notify/package.nix
+++ b/pkgs/by-name/ne/networkd-notify/package.nix
@@ -11,7 +11,7 @@ python3Packages.buildPythonApplication rec {
   pname = "networkd-notify";
   version = "unstable-2022-11-29";
   # There is no setup.py, just a single Python script.
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitLab {
     owner = "wavexx";
diff --git a/pkgs/by-name/nm/nmap-parse/package.nix b/pkgs/by-name/nm/nmap-parse/package.nix
index cfb19087aaba..a068a87f2385 100644
--- a/pkgs/by-name/nm/nmap-parse/package.nix
+++ b/pkgs/by-name/nm/nmap-parse/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "nmap-parse";
   version = "0-unstable-2022-09-26";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "jonny1102";
diff --git a/pkgs/by-name/nm/nmgui/package.nix b/pkgs/by-name/nm/nmgui/package.nix
index c9841e537631..f773080804ba 100644
--- a/pkgs/by-name/nm/nmgui/package.nix
+++ b/pkgs/by-name/nm/nmgui/package.nix
@@ -14,7 +14,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "nmgui";
   version = "1.0.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "s-adi-dev";
diff --git a/pkgs/by-name/nt/ntlm-challenger/package.nix b/pkgs/by-name/nt/ntlm-challenger/package.nix
index 52099f5108f2..e1209a58ecfa 100644
--- a/pkgs/by-name/nt/ntlm-challenger/package.nix
+++ b/pkgs/by-name/nt/ntlm-challenger/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "ntlm-challenger";
   version = "0-unstable-2022-11-10";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "nopfor";
diff --git a/pkgs/by-name/nu/numberstation/package.nix b/pkgs/by-name/nu/numberstation/package.nix
index 27197ab7ad6c..47a05fca54a8 100644
--- a/pkgs/by-name/nu/numberstation/package.nix
+++ b/pkgs/by-name/nu/numberstation/package.nix
@@ -18,7 +18,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "numberstation";
   version = "1.4.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromSourcehut {
     owner = "~martijnbraam";
diff --git a/pkgs/by-name/op/openswitcher/package.nix b/pkgs/by-name/op/openswitcher/package.nix
index 941e6a944d31..045b562989e0 100644
--- a/pkgs/by-name/op/openswitcher/package.nix
+++ b/pkgs/by-name/op/openswitcher/package.nix
@@ -17,7 +17,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "openswitcher";
   version = "0.13.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromSourcehut {
     owner = "~martijnbraam";
diff --git a/pkgs/by-name/or/orca/package.nix b/pkgs/by-name/or/orca/package.nix
index c5d4988f5df5..9dd74cb5fafd 100644
--- a/pkgs/by-name/or/orca/package.nix
+++ b/pkgs/by-name/or/orca/package.nix
@@ -33,7 +33,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "orca";
   version = "49.5";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/orca/${lib.versions.major version}/orca-${version}.tar.xz";
diff --git a/pkgs/by-name/pa/patchance/package.nix b/pkgs/by-name/pa/patchance/package.nix
index c96e24d86aaa..04f9d2cdca17 100644
--- a/pkgs/by-name/pa/patchance/package.nix
+++ b/pkgs/by-name/pa/patchance/package.nix
@@ -17,7 +17,7 @@ python3Packages.buildPythonApplication rec {
     hash = "sha256-wlkEKkPH2C/y7TQicIVycWbtLUdX2hICcUWi7nFN51w=";
   };
 
-  format = "other";
+  pyproject = false;
 
   nativeBuildInputs = [
     python3Packages.pyqt5 # pyuic5 and pyrcc5 to build resources.
diff --git a/pkgs/by-name/pd/pdf-quench/package.nix b/pkgs/by-name/pd/pdf-quench/package.nix
index bb682fd5b253..cdd8d2cc0f4f 100644
--- a/pkgs/by-name/pd/pdf-quench/package.nix
+++ b/pkgs/by-name/pd/pdf-quench/package.nix
@@ -32,7 +32,7 @@ python3.pkgs.buildPythonApplication {
     pypdf2
   ];
 
-  format = "other";
+  pyproject = false;
   doCheck = false;
 
   installPhase = ''
diff --git a/pkgs/by-name/pd/pdfdiff/package.nix b/pkgs/by-name/pd/pdfdiff/package.nix
index 7cdf764ff33f..3a0f377092a0 100644
--- a/pkgs/by-name/pd/pdfdiff/package.nix
+++ b/pkgs/by-name/pd/pdfdiff/package.nix
@@ -16,7 +16,7 @@ python3Packages.buildPythonApplication rec {
     hash = "sha256-NPki/PFm0b71Ksak1mimR4w6J2a0jBCbQDTMQR4uZFI=";
   };
 
-  format = "other";
+  pyproject = false;
 
   dontConfigure = true;
   dontBuild = true;
diff --git a/pkgs/by-name/pd/pdfid/package.nix b/pkgs/by-name/pd/pdfid/package.nix
index d6d551b1716d..1cbeee66f3d3 100644
--- a/pkgs/by-name/pd/pdfid/package.nix
+++ b/pkgs/by-name/pd/pdfid/package.nix
@@ -9,7 +9,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "pdfid";
   version = "0.2.10";
-  format = "other";
+  pyproject = false;
 
   src = fetchzip {
     url = "https://didierstevens.com/files/software/pdfid_v${
diff --git a/pkgs/by-name/pe/peering-manager/package.nix b/pkgs/by-name/pe/peering-manager/package.nix
index 8ee22ea0c81a..9a43f810719e 100644
--- a/pkgs/by-name/pe/peering-manager/package.nix
+++ b/pkgs/by-name/pe/peering-manager/package.nix
@@ -25,7 +25,7 @@ python.pkgs.buildPythonApplication rec {
     sha256 = "sha256-ByECaQ6NW1Su+k/j/bcKJqFf7bStdWZxOZn95GJEqBg=";
   };
 
-  format = "other";
+  pyproject = false;
 
   propagatedBuildInputs =
     with python.pkgs;
diff --git a/pkgs/by-name/pe/persepolis/package.nix b/pkgs/by-name/pe/persepolis/package.nix
index 38de1e4b4a93..4ea5a28447ac 100644
--- a/pkgs/by-name/pe/persepolis/package.nix
+++ b/pkgs/by-name/pe/persepolis/package.nix
@@ -11,7 +11,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "persepolis";
   version = "5.2.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "persepolisdm";
diff --git a/pkgs/by-name/ph/photon/package.nix b/pkgs/by-name/ph/photon/package.nix
index 13188edd8e4d..a7b76c7a818c 100644
--- a/pkgs/by-name/ph/photon/package.nix
+++ b/pkgs/by-name/ph/photon/package.nix
@@ -7,7 +7,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "photon";
   version = "1.3.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "s0md3v";
diff --git a/pkgs/by-name/pi/piper/package.nix b/pkgs/by-name/pi/piper/package.nix
index 083ebff2d2a3..d212b4168c39 100644
--- a/pkgs/by-name/pi/piper/package.nix
+++ b/pkgs/by-name/pi/piper/package.nix
@@ -20,7 +20,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "piper";
   version = "0.8";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "libratbag";
diff --git a/pkgs/by-name/pi/pithos/package.nix b/pkgs/by-name/pi/pithos/package.nix
index e293b5b28ed0..9f46c9a5a5c3 100644
--- a/pkgs/by-name/pi/pithos/package.nix
+++ b/pkgs/by-name/pi/pithos/package.nix
@@ -28,7 +28,7 @@ python3Packages.buildPythonApplication rec {
     hash = "sha256-3j6IoMi30BQ8WHK4BxbsW+/3XZx7rBFd47EBENa2GiQ=";
   };
 
-  format = "other";
+  pyproject = false;
 
   postPatch = ''
     chmod +x meson_post_install.py
diff --git a/pkgs/by-name/pi/pitivi/package.nix b/pkgs/by-name/pi/pitivi/package.nix
index d45bb5a0accb..979272f4f418 100644
--- a/pkgs/by-name/pi/pitivi/package.nix
+++ b/pkgs/by-name/pi/pitivi/package.nix
@@ -24,7 +24,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "pitivi";
   version = "2023.03";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/pitivi/${lib.versions.major version}/${pname}-${version}.tar.xz";
diff --git a/pkgs/by-name/pi/pixelflasher/package.nix b/pkgs/by-name/pi/pixelflasher/package.nix
index 047b1e94e092..57106c68fb13 100644
--- a/pkgs/by-name/pi/pixelflasher/package.nix
+++ b/pkgs/by-name/pi/pixelflasher/package.nix
@@ -11,7 +11,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "pixelflasher";
   version = "8.9.1.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "badabing2005";
diff --git a/pkgs/by-name/pl/plasma-hud/package.nix b/pkgs/by-name/pl/plasma-hud/package.nix
index e858264e9b94..bf95fdb960fe 100644
--- a/pkgs/by-name/pl/plasma-hud/package.nix
+++ b/pkgs/by-name/pl/plasma-hud/package.nix
@@ -10,7 +10,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "plasma-hud";
   version = "22.01.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Zren";
diff --git a/pkgs/by-name/po/pokete/package.nix b/pkgs/by-name/po/pokete/package.nix
index 13570c8de369..a0ab1709dd02 100644
--- a/pkgs/by-name/po/pokete/package.nix
+++ b/pkgs/by-name/po/pokete/package.nix
@@ -11,7 +11,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "pokete";
   version = "0.9.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "lxgr-linux";
diff --git a/pkgs/by-name/po/polenum/package.nix b/pkgs/by-name/po/polenum/package.nix
index 0bd26fa5f329..08bdcf22d040 100644
--- a/pkgs/by-name/po/polenum/package.nix
+++ b/pkgs/by-name/po/polenum/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "polenum";
   version = "1.7";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Wh1t3Fox";
diff --git a/pkgs/by-name/po/portfolio-filemanager/package.nix b/pkgs/by-name/po/portfolio-filemanager/package.nix
index de87e12285a1..cb4d70c8ce68 100644
--- a/pkgs/by-name/po/portfolio-filemanager/package.nix
+++ b/pkgs/by-name/po/portfolio-filemanager/package.nix
@@ -20,7 +20,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "portfolio";
   version = "1.0.2";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "tchx84";
diff --git a/pkgs/by-name/po/posteid-seed-extractor/package.nix b/pkgs/by-name/po/posteid-seed-extractor/package.nix
index f35419fd0a9a..b0680ad6d337 100644
--- a/pkgs/by-name/po/posteid-seed-extractor/package.nix
+++ b/pkgs/by-name/po/posteid-seed-extractor/package.nix
@@ -15,7 +15,7 @@ python3Packages.buildPythonApplication {
     hash = "sha256-smNwp67HYbZuMrl0uf2X2yox2JqeEV6WzIBp4dALwgw=";
   };
 
-  format = "other";
+  pyproject = false;
 
   pythonPath = with python3Packages; [
     certifi
diff --git a/pkgs/by-name/po/powersupply/package.nix b/pkgs/by-name/po/powersupply/package.nix
index b6f7b8c5f4e1..c908ae909e43 100644
--- a/pkgs/by-name/po/powersupply/package.nix
+++ b/pkgs/by-name/po/powersupply/package.nix
@@ -16,7 +16,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "powersupply";
   version = "0.10.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitLab {
     domain = "gitlab.postmarketos.org";
diff --git a/pkgs/by-name/py/pyfa/package.nix b/pkgs/by-name/py/pyfa/package.nix
index fd068e38e525..a96c1b76024c 100644
--- a/pkgs/by-name/py/pyfa/package.nix
+++ b/pkgs/by-name/py/pyfa/package.nix
@@ -16,7 +16,7 @@ in
 python3Packages.buildPythonApplication rec {
   inherit version;
   pname = "pyfa";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "pyfa-org";
diff --git a/pkgs/by-name/py/pykms/package.nix b/pkgs/by-name/py/pykms/package.nix
index 4c41b6050e5d..84bbaab68204 100644
--- a/pkgs/by-name/py/pykms/package.nix
+++ b/pkgs/by-name/py/pykms/package.nix
@@ -61,7 +61,7 @@ pypkgs.buildPythonApplication rec {
       --replace "'KmsDataBase.xml'" "'$siteDir/KmsDataBase.xml'"
   '';
 
-  format = "other";
+  pyproject = false;
 
   # there are no tests
   doCheck = false;
diff --git a/pkgs/by-name/ra/raysession/package.nix b/pkgs/by-name/ra/raysession/package.nix
index 0eb2bc77a78b..914be3150f61 100644
--- a/pkgs/by-name/ra/raysession/package.nix
+++ b/pkgs/by-name/ra/raysession/package.nix
@@ -25,7 +25,7 @@ python3Packages.buildPythonApplication rec {
     chmod -x src/clients/jackpatch/main_loop.py
   '';
 
-  format = "other";
+  pyproject = false;
 
   nativeBuildInputs = [
     python3Packages.pyqt5 # pyuic5 and pyrcc5 to build resources.
diff --git a/pkgs/by-name/rc/rcu/package.nix b/pkgs/by-name/rc/rcu/package.nix
index 6f58990b4e10..7a00c9b90c72 100644
--- a/pkgs/by-name/rc/rcu/package.nix
+++ b/pkgs/by-name/rc/rcu/package.nix
@@ -26,7 +26,7 @@ python3Packages.buildPythonApplication rec {
   pname = "rcu";
   version = "4.0.32";
 
-  format = "other";
+  pyproject = false;
 
   src =
     let
diff --git a/pkgs/by-name/re/recapp/package.nix b/pkgs/by-name/re/recapp/package.nix
index e0026932750e..64a982da3277 100644
--- a/pkgs/by-name/re/recapp/package.nix
+++ b/pkgs/by-name/re/recapp/package.nix
@@ -22,7 +22,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "recapp";
   version = "1.1.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "amikha1lov";
diff --git a/pkgs/by-name/re/responder/package.nix b/pkgs/by-name/re/responder/package.nix
index f7de394fc9f4..6d7b1d166076 100644
--- a/pkgs/by-name/re/responder/package.nix
+++ b/pkgs/by-name/re/responder/package.nix
@@ -8,7 +8,7 @@
 python3.pkgs.buildPythonApplication (finalAttrs: {
   pname = "responder";
   version = "3.2.0.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "lgandx";
diff --git a/pkgs/by-name/sc/scan-build-py/package.nix b/pkgs/by-name/sc/scan-build-py/package.nix
index 934a77f5db21..630bd67ddb47 100644
--- a/pkgs/by-name/sc/scan-build-py/package.nix
+++ b/pkgs/by-name/sc/scan-build-py/package.nix
@@ -10,7 +10,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "scan-build-py";
   inherit (clang-unwrapped) version;
 
-  format = "other";
+  pyproject = false;
 
   src = clang-unwrapped + "/bin";
 
diff --git a/pkgs/by-name/sc/scfbuild/package.nix b/pkgs/by-name/sc/scfbuild/package.nix
index 1f3f6b3a4b32..f047a4177d5d 100644
--- a/pkgs/by-name/sc/scfbuild/package.nix
+++ b/pkgs/by-name/sc/scfbuild/package.nix
@@ -9,7 +9,7 @@ python3Packages.buildPythonApplication {
   pname = "scfbuild";
   version = "2.0.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "13rac1";
diff --git a/pkgs/by-name/sc/scli/package.nix b/pkgs/by-name/sc/scli/package.nix
index d3b76edce4c8..8c3fe431ff84 100644
--- a/pkgs/by-name/sc/scli/package.nix
+++ b/pkgs/by-name/sc/scli/package.nix
@@ -25,7 +25,7 @@ python3.pkgs.buildPythonApplication rec {
     urwid
     urwid-readline
   ];
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
 
diff --git a/pkgs/by-name/sd/sdat2img/package.nix b/pkgs/by-name/sd/sdat2img/package.nix
index dafeb554fba1..deda00b44b66 100644
--- a/pkgs/by-name/sd/sdat2img/package.nix
+++ b/pkgs/by-name/sd/sdat2img/package.nix
@@ -15,7 +15,7 @@ python3Packages.buildPythonApplication {
     sha256 = "sha256-NCbf9H0hoJgeDtP6cQY0H280BQqgKXv3ConZ87QixVY=";
   };
 
-  format = "other";
+  pyproject = false;
   installPhase = ''
     install -D $src/sdat2img.py $out/bin/sdat2img
   '';
diff --git a/pkgs/by-name/si/silenthound/package.nix b/pkgs/by-name/si/silenthound/package.nix
index 849ddade882e..ba4995b544bd 100644
--- a/pkgs/by-name/si/silenthound/package.nix
+++ b/pkgs/by-name/si/silenthound/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "silenthound";
   version = "0-unstable-2022-12-14";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "layer8secure";
diff --git a/pkgs/by-name/sm/smbscan/package.nix b/pkgs/by-name/sm/smbscan/package.nix
index 448bf86d403b..f5bca72cfee9 100644
--- a/pkgs/by-name/sm/smbscan/package.nix
+++ b/pkgs/by-name/sm/smbscan/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication {
   pname = "smbscan";
   version = "0-unstable-2022-05-26";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "jeffhacks";
diff --git a/pkgs/by-name/so/social-engineer-toolkit/package.nix b/pkgs/by-name/so/social-engineer-toolkit/package.nix
index 5e88bbc6fd80..0275b0ed59ef 100644
--- a/pkgs/by-name/so/social-engineer-toolkit/package.nix
+++ b/pkgs/by-name/so/social-engineer-toolkit/package.nix
@@ -9,7 +9,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "social-engineer-toolkit";
   version = "8.0.3";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "trustedsec";
diff --git a/pkgs/by-name/so/sockdump/package.nix b/pkgs/by-name/so/sockdump/package.nix
index 56565a495927..6a4000aaa700 100644
--- a/pkgs/by-name/so/sockdump/package.nix
+++ b/pkgs/by-name/so/sockdump/package.nix
@@ -18,7 +18,7 @@ python3.pkgs.buildPythonApplication rec {
 
   propagatedBuildInputs = [ bcc ];
 
-  format = "other"; # none
+  pyproject = false; # none
 
   installPhase = "install -D sockdump.py $out/bin/sockdump";
 
diff --git a/pkgs/by-name/so/solfege/package.nix b/pkgs/by-name/so/solfege/package.nix
index 0e3c338721be..d1ec677b0de6 100644
--- a/pkgs/by-name/so/solfege/package.nix
+++ b/pkgs/by-name/so/solfege/package.nix
@@ -29,7 +29,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "solfege";
   version = "3.23.4";
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "https://alpha.gnu.org/gnu/solfege/solfege-${version}.tar.gz";
diff --git a/pkgs/by-name/so/sonota/package.nix b/pkgs/by-name/so/sonota/package.nix
index e0e22511dbf0..ae6e5abe7d35 100644
--- a/pkgs/by-name/so/sonota/package.nix
+++ b/pkgs/by-name/so/sonota/package.nix
@@ -36,7 +36,7 @@ buildPythonApplication rec {
     substituteInPlace sonota.py --subst-var out
   '';
 
-  format = "other";
+  pyproject = false;
 
   propagatedBuildInputs = [
     httplib2
diff --git a/pkgs/by-name/sw/sway-assign-cgroups/package.nix b/pkgs/by-name/sw/sway-assign-cgroups/package.nix
index ea0e52cf2796..1c14dbcb5d08 100644
--- a/pkgs/by-name/sw/sway-assign-cgroups/package.nix
+++ b/pkgs/by-name/sw/sway-assign-cgroups/package.nix
@@ -13,7 +13,7 @@ python3Packages.buildPythonApplication rec {
     tag = "v${version}";
     hash = "sha256-AJ87/sPy8IVJgb5YehfUfNTOFEDithLfiTxgZfZf238=";
   };
-  format = "other";
+  pyproject = false;
 
   propagatedBuildInputs = with python3Packages; [
     dbus-next
diff --git a/pkgs/by-name/sy/syncplay/package.nix b/pkgs/by-name/sy/syncplay/package.nix
index 98bec9f4b631..04a733aa1839 100644
--- a/pkgs/by-name/sy/syncplay/package.nix
+++ b/pkgs/by-name/sy/syncplay/package.nix
@@ -11,7 +11,7 @@ python3Packages.buildPythonApplication rec {
   pname = "syncplay";
   version = "1.7.4";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Syncplay";
diff --git a/pkgs/by-name/ta/tandoor-recipes/package.nix b/pkgs/by-name/ta/tandoor-recipes/package.nix
index c04940c22f52..c226ab8ffd82 100644
--- a/pkgs/by-name/ta/tandoor-recipes/package.nix
+++ b/pkgs/by-name/ta/tandoor-recipes/package.nix
@@ -19,7 +19,7 @@ python.pkgs.buildPythonPackage {
 
   inherit (common) version src;
 
-  format = "other";
+  pyproject = false;
 
   patches = [
     ./pytest-xdist.patch # adapt pytest.ini the use $NIX_BUILD_CORES
diff --git a/pkgs/by-name/th/themechanger/package.nix b/pkgs/by-name/th/themechanger/package.nix
index 8859bd27e7d4..dff2f3abcfc5 100644
--- a/pkgs/by-name/th/themechanger/package.nix
+++ b/pkgs/by-name/th/themechanger/package.nix
@@ -20,7 +20,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "themechanger";
   version = "0.12.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "ALEX11BR";
diff --git a/pkgs/by-name/th/thumbdrives/package.nix b/pkgs/by-name/th/thumbdrives/package.nix
index 9e41a3c7f4e3..c024bf077c4c 100644
--- a/pkgs/by-name/th/thumbdrives/package.nix
+++ b/pkgs/by-name/th/thumbdrives/package.nix
@@ -18,7 +18,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "thumbdrives";
   version = "0.3.2";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromSourcehut {
     owner = "~martijnbraam";
diff --git a/pkgs/by-name/ti/timeline/package.nix b/pkgs/by-name/ti/timeline/package.nix
index ce3ec303d66b..cb2b9683485f 100644
--- a/pkgs/by-name/ti/timeline/package.nix
+++ b/pkgs/by-name/ti/timeline/package.nix
@@ -11,7 +11,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "timeline";
   version = "2.11.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://sourceforge/thetimelineproj/${pname}-${version}.zip";
diff --git a/pkgs/by-name/tu/tuhi/package.nix b/pkgs/by-name/tu/tuhi/package.nix
index a81e6eac154f..afa77bd2f295 100644
--- a/pkgs/by-name/tu/tuhi/package.nix
+++ b/pkgs/by-name/tu/tuhi/package.nix
@@ -17,7 +17,7 @@ python3Packages.buildPythonApplication rec {
   pname = "tuhi";
   version = "0.6";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "tuhiproject";
diff --git a/pkgs/by-name/ub/ubports-click/package.nix b/pkgs/by-name/ub/ubports-click/package.nix
index 19042772495c..8f46c2a2581a 100644
--- a/pkgs/by-name/ub/ubports-click/package.nix
+++ b/pkgs/by-name/ub/ubports-click/package.nix
@@ -26,7 +26,7 @@ let
   self = python3Packages.buildPythonApplication rec {
     pname = "click";
     version = "0.5.2";
-    format = "other";
+    pyproject = false;
 
     src = fetchFromGitLab {
       owner = "ubports";
diff --git a/pkgs/by-name/un/unhide-gui/package.nix b/pkgs/by-name/un/unhide-gui/package.nix
index 41588bffd15d..91e6b0cd70e9 100644
--- a/pkgs/by-name/un/unhide-gui/package.nix
+++ b/pkgs/by-name/un/unhide-gui/package.nix
@@ -8,7 +8,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "unhide-gui";
   version = "20240510";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "YJesus";
diff --git a/pkgs/by-name/wa/waydroid/package.nix b/pkgs/by-name/wa/waydroid/package.nix
index 8be28b6cc1ad..f5f55e65d17d 100644
--- a/pkgs/by-name/wa/waydroid/package.nix
+++ b/pkgs/by-name/wa/waydroid/package.nix
@@ -23,7 +23,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "waydroid";
   version = "1.6.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "waydroid";
diff --git a/pkgs/by-name/wh/whatip/package.nix b/pkgs/by-name/wh/whatip/package.nix
index 5035cc806412..c6b3b2630ee2 100644
--- a/pkgs/by-name/wh/whatip/package.nix
+++ b/pkgs/by-name/wh/whatip/package.nix
@@ -20,7 +20,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "whatip";
   version = "1.2";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitLab {
     domain = "gitlab.gnome.org";
diff --git a/pkgs/by-name/xd/xdgmenumaker/package.nix b/pkgs/by-name/xd/xdgmenumaker/package.nix
index a13c78010d09..3a965bf45a9d 100644
--- a/pkgs/by-name/xd/xdgmenumaker/package.nix
+++ b/pkgs/by-name/xd/xdgmenumaker/package.nix
@@ -22,7 +22,7 @@ python3Packages.buildPythonApplication rec {
     sha256 = "rh1rRgbw8uqii4oN3XXNNKsWam1d8TY0qGceHERlG1k=";
   };
 
-  format = "other";
+  pyproject = false;
 
   strictDeps = false;
 
diff --git a/pkgs/by-name/xo/xorex/package.nix b/pkgs/by-name/xo/xorex/package.nix
index 652489d393d8..f62b758e77ee 100644
--- a/pkgs/by-name/xo/xorex/package.nix
+++ b/pkgs/by-name/xo/xorex/package.nix
@@ -6,7 +6,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "xorex";
   version = "0.3.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Neo23x0";
diff --git a/pkgs/by-name/ya/yarGen/package.nix b/pkgs/by-name/ya/yarGen/package.nix
index 4ba0c04118a5..25bf0be35e58 100644
--- a/pkgs/by-name/ya/yarGen/package.nix
+++ b/pkgs/by-name/ya/yarGen/package.nix
@@ -7,7 +7,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "yarGen";
   version = "0.23.4";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Neo23x0";
diff --git a/pkgs/by-name/ye/yelp-tools/package.nix b/pkgs/by-name/ye/yelp-tools/package.nix
index 6d98108f319a..afaae80c25b0 100644
--- a/pkgs/by-name/ye/yelp-tools/package.nix
+++ b/pkgs/by-name/ye/yelp-tools/package.nix
@@ -16,7 +16,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "yelp-tools";
   version = "42.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/yelp-tools/${lib.versions.major version}/${pname}-${version}.tar.xz";
diff --git a/pkgs/by-name/ze/zeronet-conservancy/package.nix b/pkgs/by-name/ze/zeronet-conservancy/package.nix
index 6301630dcb9e..d59371dedc61 100644
--- a/pkgs/by-name/ze/zeronet-conservancy/package.nix
+++ b/pkgs/by-name/ze/zeronet-conservancy/package.nix
@@ -8,7 +8,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "zeronet-conservancy";
   version = "0.7.10";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "zeronet-conservancy";
diff --git a/pkgs/by-name/ze/zeronet/package.nix b/pkgs/by-name/ze/zeronet/package.nix
index aa8d5b5ab062..358a40052975 100644
--- a/pkgs/by-name/ze/zeronet/package.nix
+++ b/pkgs/by-name/ze/zeronet/package.nix
@@ -7,7 +7,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "zeronet";
   version = "0.7.1";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "HelloZeroNet";
diff --git a/pkgs/by-name/ze/zeyple/package.nix b/pkgs/by-name/ze/zeyple/package.nix
index 72dd9ce86153..dabdc8618f52 100644
--- a/pkgs/by-name/ze/zeyple/package.nix
+++ b/pkgs/by-name/ze/zeyple/package.nix
@@ -8,7 +8,7 @@ python3Packages.buildPythonApplication {
   pname = "zeyple";
   version = "unstable-2021-04-10";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "infertux";
diff --git a/pkgs/by-name/zi/zircolite/package.nix b/pkgs/by-name/zi/zircolite/package.nix
index e626a44c2fae..ac788099dc6a 100644
--- a/pkgs/by-name/zi/zircolite/package.nix
+++ b/pkgs/by-name/zi/zircolite/package.nix
@@ -8,7 +8,7 @@
 python3.pkgs.buildPythonApplication rec {
   pname = "zircolite";
   version = "2.40.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "wagga40";
diff --git a/pkgs/by-name/zp/zpool-iostat-viz/package.nix b/pkgs/by-name/zp/zpool-iostat-viz/package.nix
index 46cb1cf10eec..610497499b81 100644
--- a/pkgs/by-name/zp/zpool-iostat-viz/package.nix
+++ b/pkgs/by-name/zp/zpool-iostat-viz/package.nix
@@ -8,7 +8,7 @@
 python3Packages.buildPythonApplication {
   pname = "zpool-iostat-viz";
   version = "unstable-2021-11-13";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "chadmiller";
diff --git a/pkgs/desktops/mate/mozo/default.nix b/pkgs/desktops/mate/mozo/default.nix
index a27b94d8e4af..f90066f4e1fe 100644
--- a/pkgs/desktops/mate/mozo/default.nix
+++ b/pkgs/desktops/mate/mozo/default.nix
@@ -16,7 +16,7 @@ python3.pkgs.buildPythonApplication rec {
   pname = "mozo";
   version = "1.28.0";
 
-  format = "other";
+  pyproject = false;
   doCheck = false;
 
   src = fetchurl {
diff --git a/pkgs/development/interpreters/python/tests.nix b/pkgs/development/interpreters/python/tests.nix
index 14df2c494523..fd0d21577379 100644
--- a/pkgs/development/interpreters/python/tests.nix
+++ b/pkgs/development/interpreters/python/tests.nix
@@ -249,7 +249,7 @@ let
         python.pkgs.buildPythonPackage {
           pname = "requests";
           version = "2.24.0";
-          format = "other";
+          pyproject = false;
           src = fetchurl {
             url = "https://repo.anaconda.com/pkgs/main/noarch/requests-2.24.0-py_0.tar.bz2";
             sha256 = "02qzaf6gwsqbcs69pix1fnjxzgnngwzvrsy65h1d521g750mjvvp";
diff --git a/pkgs/development/libraries/science/chemistry/tblite/python.nix b/pkgs/development/libraries/science/chemistry/tblite/python.nix
index 5fa76765a655..1039df75452f 100644
--- a/pkgs/development/libraries/science/chemistry/tblite/python.nix
+++ b/pkgs/development/libraries/science/chemistry/tblite/python.nix
@@ -60,7 +60,7 @@ buildPythonPackage {
     ./0001-fix-multicharge-dep-needed-for-static-compilation.patch
   ];
 
-  format = "other";
+  pyproject = false;
   pythonImportsCheck = [
     "tblite"
     "tblite.interface"
diff --git a/pkgs/development/python-modules/arro3/default.nix b/pkgs/development/python-modules/arro3/default.nix
index db8406ad71e2..dcf3f038fdbb 100644
--- a/pkgs/development/python-modules/arro3/default.nix
+++ b/pkgs/development/python-modules/arro3/default.nix
@@ -99,7 +99,7 @@ let
     pname = "arro3-tests";
     version = arro3-core.version;
 
-    format = "other";
+    pyproject = false;
     dontBuild = true;
     dontInstall = true;
 
diff --git a/pkgs/development/python-modules/attrs/tests.nix b/pkgs/development/python-modules/attrs/tests.nix
index d657ba1ffc5a..9181504fcade 100644
--- a/pkgs/development/python-modules/attrs/tests.nix
+++ b/pkgs/development/python-modules/attrs/tests.nix
@@ -8,7 +8,7 @@
 buildPythonPackage {
   pname = "attrs-tests";
   inherit (attrs) version;
-  format = "other";
+  pyproject = false;
 
   srcs = attrs.testout;
 
diff --git a/pkgs/development/python-modules/build/default.nix b/pkgs/development/python-modules/build/default.nix
index 0fefab4aba17..7e98cf4bc4ae 100644
--- a/pkgs/development/python-modules/build/default.nix
+++ b/pkgs/development/python-modules/build/default.nix
@@ -49,7 +49,7 @@ buildPythonPackage rec {
     pytest = buildPythonPackage {
       pname = "${pname}-pytest";
       inherit src version;
-      format = "other";
+      pyproject = false;
 
       dontBuild = true;
       dontInstall = true;
diff --git a/pkgs/development/python-modules/cliff/tests.nix b/pkgs/development/python-modules/cliff/tests.nix
index 76bac52a89c7..bcf0950dad1d 100644
--- a/pkgs/development/python-modules/cliff/tests.nix
+++ b/pkgs/development/python-modules/cliff/tests.nix
@@ -9,7 +9,7 @@
 buildPythonPackage {
   pname = "cliff";
   inherit (cliff) version src;
-  format = "other";
+  pyproject = false;
 
   postPatch = ''
     # only a small portion of the listed packages are actually needed for running the tests
diff --git a/pkgs/development/python-modules/debtcollector/tests.nix b/pkgs/development/python-modules/debtcollector/tests.nix
index 846db4f0bf69..a2013d7e8336 100644
--- a/pkgs/development/python-modules/debtcollector/tests.nix
+++ b/pkgs/development/python-modules/debtcollector/tests.nix
@@ -7,7 +7,7 @@
 buildPythonPackage {
   pname = "debtcollector-tests";
   inherit (debtcollector) version src;
-  format = "other";
+  pyproject = false;
 
   postPatch = ''
     # only a small portion of the listed packages are actually needed for running the tests
diff --git a/pkgs/development/python-modules/dnf-plugins-core/default.nix b/pkgs/development/python-modules/dnf-plugins-core/default.nix
index ab7d1e951a4a..cf9ace0fdf8f 100644
--- a/pkgs/development/python-modules/dnf-plugins-core/default.nix
+++ b/pkgs/development/python-modules/dnf-plugins-core/default.nix
@@ -25,7 +25,7 @@ in
 buildPythonPackage rec {
   pname = "dnf-plugins-core";
   version = "4.10.1";
-  format = "other";
+  pyproject = false;
 
   outputs = [
     "out"
diff --git a/pkgs/development/python-modules/dnf4/default.nix b/pkgs/development/python-modules/dnf4/default.nix
index 33f1eebddcc2..bb21d6a64837 100644
--- a/pkgs/development/python-modules/dnf4/default.nix
+++ b/pkgs/development/python-modules/dnf4/default.nix
@@ -19,7 +19,7 @@ in
 buildPythonPackage rec {
   pname = "dnf4";
   version = "4.24.0";
-  format = "other";
+  pyproject = false;
 
   outputs = [
     "out"
diff --git a/pkgs/development/python-modules/faiss/pytest.nix b/pkgs/development/python-modules/faiss/pytest.nix
index b90ee9c244c6..40b8b5b8351b 100644
--- a/pkgs/development/python-modules/faiss/pytest.nix
+++ b/pkgs/development/python-modules/faiss/pytest.nix
@@ -13,7 +13,7 @@ buildPythonPackage {
   pname = "faiss-pytest-suite";
   inherit (faiss) version;
 
-  format = "other";
+  pyproject = false;
 
   src = "${faiss-build.src}/tests";
 
diff --git a/pkgs/development/python-modules/gst-python/default.nix b/pkgs/development/python-modules/gst-python/default.nix
index 52c3119e435f..fc182732af42 100644
--- a/pkgs/development/python-modules/gst-python/default.nix
+++ b/pkgs/development/python-modules/gst-python/default.nix
@@ -23,7 +23,7 @@ buildPythonPackage rec {
   pname = "gst-python";
   version = "1.26.0";
 
-  format = "other";
+  pyproject = false;
 
   outputs = [
     "out"
diff --git a/pkgs/development/python-modules/installer/default.nix b/pkgs/development/python-modules/installer/default.nix
index e910c9e801de..b7273769abbb 100644
--- a/pkgs/development/python-modules/installer/default.nix
+++ b/pkgs/development/python-modules/installer/default.nix
@@ -43,7 +43,7 @@ buildPythonPackage rec {
     pytest = buildPythonPackage {
       pname = "${pname}-pytest";
       inherit version;
-      format = "other";
+      pyproject = false;
 
       dontBuild = true;
       dontInstall = true;
diff --git a/pkgs/development/python-modules/ipykernel/tests.nix b/pkgs/development/python-modules/ipykernel/tests.nix
index 2d8726f1418b..c1d7d1d7606b 100644
--- a/pkgs/development/python-modules/ipykernel/tests.nix
+++ b/pkgs/development/python-modules/ipykernel/tests.nix
@@ -15,7 +15,7 @@
 buildPythonPackage {
   pname = "ipykernel-tests";
   inherit (ipykernel) version src;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/libarcus/default.nix b/pkgs/development/python-modules/libarcus/default.nix
index c95ca012cd5d..7ce870199361 100644
--- a/pkgs/development/python-modules/libarcus/default.nix
+++ b/pkgs/development/python-modules/libarcus/default.nix
@@ -13,7 +13,7 @@
 buildPythonPackage rec {
   pname = "libarcus";
   version = "4.12.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
diff --git a/pkgs/development/python-modules/libear/default.nix b/pkgs/development/python-modules/libear/default.nix
index b1f00bc1e1aa..19f831be9f9f 100644
--- a/pkgs/development/python-modules/libear/default.nix
+++ b/pkgs/development/python-modules/libear/default.nix
@@ -10,7 +10,7 @@ buildPythonPackage rec {
   pname = "libear";
   inherit (clang-unwrapped) version;
 
-  format = "other";
+  pyproject = false;
 
   src = clang-unwrapped.lib + "/lib/libear";
 
diff --git a/pkgs/development/python-modules/libsavitar/default.nix b/pkgs/development/python-modules/libsavitar/default.nix
index f4e015aebf28..671198862028 100644
--- a/pkgs/development/python-modules/libsavitar/default.nix
+++ b/pkgs/development/python-modules/libsavitar/default.nix
@@ -12,7 +12,7 @@
 buildPythonPackage rec {
   pname = "libsavitar";
   version = "4.12.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
diff --git a/pkgs/development/python-modules/libscanbuild/default.nix b/pkgs/development/python-modules/libscanbuild/default.nix
index 667c7e162e77..987e806e9ebf 100644
--- a/pkgs/development/python-modules/libscanbuild/default.nix
+++ b/pkgs/development/python-modules/libscanbuild/default.nix
@@ -11,7 +11,7 @@ buildPythonPackage rec {
   pname = "libscanbuild";
   inherit (clang-unwrapped) version;
 
-  format = "other";
+  pyproject = false;
 
   src = clang-unwrapped.lib + "/lib/libscanbuild";
 
diff --git a/pkgs/development/python-modules/lzallright/tests.nix b/pkgs/development/python-modules/lzallright/tests.nix
index f28dd124278a..37947ce6eaab 100644
--- a/pkgs/development/python-modules/lzallright/tests.nix
+++ b/pkgs/development/python-modules/lzallright/tests.nix
@@ -7,7 +7,7 @@
 buildPythonPackage {
   inherit (lzallright) version src;
   pname = "lzallright-tests";
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/materialx/default.nix b/pkgs/development/python-modules/materialx/default.nix
index 96d3995259cd..4fb823a2a2dd 100644
--- a/pkgs/development/python-modules/materialx/default.nix
+++ b/pkgs/development/python-modules/materialx/default.nix
@@ -24,7 +24,7 @@ buildPythonPackage rec {
     hash = "sha256-XNfXOC76zM5Ns2DyyE3mKCJ1iJaszs1M0rBdVLRDo8E=";
   };
 
-  format = "other";
+  pyproject = false;
 
   nativeBuildInputs = [
     cmake
diff --git a/pkgs/development/python-modules/meep/default.nix b/pkgs/development/python-modules/meep/default.nix
index 80e57c36f22f..a49a7bce19ca 100644
--- a/pkgs/development/python-modules/meep/default.nix
+++ b/pkgs/development/python-modules/meep/default.nix
@@ -45,7 +45,7 @@ buildPythonPackage rec {
     hash = "sha256-x5OMdV/LJfklcK1KlYS0pdotsXP/SYzF7AOW5DlJvq0=";
   };
 
-  format = "other";
+  pyproject = false;
 
   # MPI is needed in nativeBuildInputs too, otherwise MPI libs will be missing
   # at runtime
diff --git a/pkgs/development/python-modules/openstacksdk/tests.nix b/pkgs/development/python-modules/openstacksdk/tests.nix
index 8d9c5ac992f9..4e7031b0ff96 100644
--- a/pkgs/development/python-modules/openstacksdk/tests.nix
+++ b/pkgs/development/python-modules/openstacksdk/tests.nix
@@ -17,7 +17,7 @@
 buildPythonPackage {
   pname = "openstacksdk-tests";
   inherit (openstacksdk) version src;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/opentsne/default.nix b/pkgs/development/python-modules/opentsne/default.nix
index fdd8934f486a..8c2f13122c90 100644
--- a/pkgs/development/python-modules/opentsne/default.nix
+++ b/pkgs/development/python-modules/opentsne/default.nix
@@ -42,7 +42,7 @@ let
     passthru = {
       tests.pytest = self.overridePythonAttrs (old: {
         pname = "${old.pname}-tests";
-        format = "other";
+        pyproject = false;
 
         postPatch = "rm openTSNE -rf";
 
diff --git a/pkgs/development/python-modules/openvino/default.nix b/pkgs/development/python-modules/openvino/default.nix
index 51a18f4be190..a06892972b21 100644
--- a/pkgs/development/python-modules/openvino/default.nix
+++ b/pkgs/development/python-modules/openvino/default.nix
@@ -9,7 +9,7 @@
 buildPythonPackage {
   pname = "openvino";
   inherit (openvino-native) version;
-  format = "other";
+  pyproject = false;
 
   src = openvino-native.python;
 
diff --git a/pkgs/development/python-modules/os-service-types/tests.nix b/pkgs/development/python-modules/os-service-types/tests.nix
index f5cbe994e9e8..b03317472dac 100644
--- a/pkgs/development/python-modules/os-service-types/tests.nix
+++ b/pkgs/development/python-modules/os-service-types/tests.nix
@@ -11,7 +11,7 @@
 buildPythonPackage {
   pname = "os-service-types-tests";
   inherit (os-service-types) version src;
-  format = "other";
+  pyproject = false;
 
   postPatch = ''
     # only a small portion of the listed packages are actually needed for running the tests
diff --git a/pkgs/development/python-modules/oslo-config/tests.nix b/pkgs/development/python-modules/oslo-config/tests.nix
index 7f6a3dfbf6f0..e955a714cecb 100644
--- a/pkgs/development/python-modules/oslo-config/tests.nix
+++ b/pkgs/development/python-modules/oslo-config/tests.nix
@@ -13,7 +13,7 @@
 buildPythonPackage {
   pname = "oslo-config-tests";
   inherit (oslo-config) version src;
-  format = "other";
+  pyproject = false;
 
   postPatch = ''
     # only a small portion of the listed packages are actually needed for running the tests
diff --git a/pkgs/development/python-modules/oslotest/tests.nix b/pkgs/development/python-modules/oslotest/tests.nix
index d7667166b18b..03d8dbf73eb8 100644
--- a/pkgs/development/python-modules/oslotest/tests.nix
+++ b/pkgs/development/python-modules/oslotest/tests.nix
@@ -8,7 +8,7 @@
 buildPythonPackage {
   pname = "oslotest-tests";
   inherit (oslotest) version src;
-  format = "other";
+  pyproject = false;
 
   postPatch = ''
     # only a small portion of the listed packages are actually needed for running the tests
diff --git a/pkgs/development/python-modules/pbr/tests.nix b/pkgs/development/python-modules/pbr/tests.nix
index 99b5c7cc3e18..ede61b0dc11c 100644
--- a/pkgs/development/python-modules/pbr/tests.nix
+++ b/pkgs/development/python-modules/pbr/tests.nix
@@ -14,7 +14,7 @@
 buildPythonPackage {
   pname = "pbr";
   inherit (pbr) version src;
-  format = "other";
+  pyproject = false;
 
   postPatch = ''
     # only a small portion of the listed packages are actually needed for running the tests
diff --git a/pkgs/development/python-modules/pivy/default.nix b/pkgs/development/python-modules/pivy/default.nix
index 2e0c1da896c4..b9d19289f13a 100644
--- a/pkgs/development/python-modules/pivy/default.nix
+++ b/pkgs/development/python-modules/pivy/default.nix
@@ -14,7 +14,7 @@
 buildPythonPackage rec {
   pname = "pivy";
   version = "0.6.10";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "coin3d";
diff --git a/pkgs/development/python-modules/pluggy/tests.nix b/pkgs/development/python-modules/pluggy/tests.nix
index 8eec02011202..25f1404067bf 100644
--- a/pkgs/development/python-modules/pluggy/tests.nix
+++ b/pkgs/development/python-modules/pluggy/tests.nix
@@ -7,7 +7,7 @@
 buildPythonPackage {
   pname = "pluggy-tests";
   inherit (pluggy) version;
-  format = "other";
+  pyproject = false;
 
   inherit (pluggy) src;
 
diff --git a/pkgs/development/python-modules/pycairo/default.nix b/pkgs/development/python-modules/pycairo/default.nix
index 9359c0d3dda5..f763019b1020 100644
--- a/pkgs/development/python-modules/pycairo/default.nix
+++ b/pkgs/development/python-modules/pycairo/default.nix
@@ -16,7 +16,7 @@ buildPythonPackage rec {
   pname = "pycairo";
   version = "1.28.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "pygobject";
diff --git a/pkgs/development/python-modules/pycangjie/default.nix b/pkgs/development/python-modules/pycangjie/default.nix
index 7fef42566dd6..18f400ac2847 100644
--- a/pkgs/development/python-modules/pycangjie/default.nix
+++ b/pkgs/development/python-modules/pycangjie/default.nix
@@ -15,7 +15,7 @@ buildPythonPackage rec {
   pname = "pycangjie";
   version = "1.5.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitLab {
     domain = "gitlab.freedesktop.org";
diff --git a/pkgs/development/python-modules/pygobject/3.nix b/pkgs/development/python-modules/pygobject/3.nix
index 3177ec952491..ac5d4ac44758 100644
--- a/pkgs/development/python-modules/pygobject/3.nix
+++ b/pkgs/development/python-modules/pygobject/3.nix
@@ -24,7 +24,7 @@ buildPythonPackage rec {
     "dev"
   ];
 
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "mirror://gnome/sources/pygobject/${lib.versions.majorMinor version}/pygobject-${version}.tar.gz";
diff --git a/pkgs/development/python-modules/pykcs11/tests.nix b/pkgs/development/python-modules/pykcs11/tests.nix
index 00468733ae30..241b25316f79 100644
--- a/pkgs/development/python-modules/pykcs11/tests.nix
+++ b/pkgs/development/python-modules/pykcs11/tests.nix
@@ -9,7 +9,7 @@
 buildPythonPackage {
   pname = "pykcs11-tests";
   inherit (pykcs11) version;
-  format = "other";
+  pyproject = false;
 
   src = pykcs11.testout;
 
diff --git a/pkgs/development/python-modules/pynest2d/default.nix b/pkgs/development/python-modules/pynest2d/default.nix
index 7f46f9667123..597d2b808775 100644
--- a/pkgs/development/python-modules/pynest2d/default.nix
+++ b/pkgs/development/python-modules/pynest2d/default.nix
@@ -13,7 +13,7 @@
 buildPythonPackage rec {
   version = "4.12.0";
   pname = "pynest2d";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
diff --git a/pkgs/development/python-modules/pyproject-hooks/default.nix b/pkgs/development/python-modules/pyproject-hooks/default.nix
index dd0241879b39..b1cf6a1628d2 100644
--- a/pkgs/development/python-modules/pyproject-hooks/default.nix
+++ b/pkgs/development/python-modules/pyproject-hooks/default.nix
@@ -34,7 +34,7 @@ buildPythonPackage rec {
     pytest = buildPythonPackage {
       pname = "${pname}-pytest";
       inherit version;
-      format = "other";
+      pyproject = false;
 
       dontBuild = true;
       dontInstall = true;
diff --git a/pkgs/development/python-modules/pytest-asyncio/tests.nix b/pkgs/development/python-modules/pytest-asyncio/tests.nix
index d5f8ead94cbe..051f710af1a8 100644
--- a/pkgs/development/python-modules/pytest-asyncio/tests.nix
+++ b/pkgs/development/python-modules/pytest-asyncio/tests.nix
@@ -11,7 +11,7 @@ buildPythonPackage {
   pname = "pytest-asyncio-tests";
   inherit (pytest-asyncio) version;
 
-  format = "other";
+  pyproject = false;
 
   src = pytest-asyncio.testout;
 
diff --git a/pkgs/development/python-modules/pytest/tests.nix b/pkgs/development/python-modules/pytest/tests.nix
index a60e3a031fdc..586f94a3f47d 100644
--- a/pkgs/development/python-modules/pytest/tests.nix
+++ b/pkgs/development/python-modules/pytest/tests.nix
@@ -7,7 +7,7 @@
 buildPythonPackage rec {
   pname = "pytest-tests";
   inherit (pytest) version;
-  format = "other";
+  pyproject = false;
 
   src = pytest.testout;
 
diff --git a/pkgs/development/python-modules/python-manilaclient/tests.nix b/pkgs/development/python-modules/python-manilaclient/tests.nix
index f743e5b2fb13..6af755e27495 100644
--- a/pkgs/development/python-modules/python-manilaclient/tests.nix
+++ b/pkgs/development/python-modules/python-manilaclient/tests.nix
@@ -11,7 +11,7 @@
 buildPythonPackage {
   pname = "python-manilaclient-tests";
   inherit (python-manilaclient) version src;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/python-octaviaclient/tests.nix b/pkgs/development/python-modules/python-octaviaclient/tests.nix
index eec943f04668..34a5d74de468 100644
--- a/pkgs/development/python-modules/python-octaviaclient/tests.nix
+++ b/pkgs/development/python-modules/python-octaviaclient/tests.nix
@@ -16,7 +16,7 @@
 buildPythonPackage {
   pname = "python-octaviaclient-tests";
   inherit (python-octaviaclient) version src;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/python-xapp/default.nix b/pkgs/development/python-modules/python-xapp/default.nix
index 06a2fa7109d9..c804cf46ffd9 100644
--- a/pkgs/development/python-modules/python-xapp/default.nix
+++ b/pkgs/development/python-modules/python-xapp/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage rec {
   pname = "python-xapp";
   version = "3.0.1";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "linuxmint";
diff --git a/pkgs/development/python-modules/root/default.nix b/pkgs/development/python-modules/root/default.nix
index 8dbfd4295ed5..4a8c7e487342 100644
--- a/pkgs/development/python-modules/root/default.nix
+++ b/pkgs/development/python-modules/root/default.nix
@@ -18,7 +18,7 @@ buildPythonPackage {
 
   src = null;
 
-  format = "other"; # disables setuptools/pyproject logic
+  pyproject = false; # disables setuptools/pyproject logic
 
   dontUnpack = true;
   dontConfigure = true;
diff --git a/pkgs/development/python-modules/sanic-testing/tests.nix b/pkgs/development/python-modules/sanic-testing/tests.nix
index 977aab156208..43a65d3e3f77 100644
--- a/pkgs/development/python-modules/sanic-testing/tests.nix
+++ b/pkgs/development/python-modules/sanic-testing/tests.nix
@@ -11,7 +11,7 @@ buildPythonPackage {
   inherit (sanic-testing) version;
 
   src = sanic-testing.testsout;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/setuptools-scm/tests.nix b/pkgs/development/python-modules/setuptools-scm/tests.nix
index ad203b22c88a..b1717d8829d3 100644
--- a/pkgs/development/python-modules/setuptools-scm/tests.nix
+++ b/pkgs/development/python-modules/setuptools-scm/tests.nix
@@ -11,7 +11,7 @@
 buildPythonPackage {
   pname = "setuptools-scm-tests";
   inherit (setuptools-scm) version src;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/sip/4.x.nix b/pkgs/development/python-modules/sip/4.x.nix
index 2c156e30e72f..e787bf2decb9 100644
--- a/pkgs/development/python-modules/sip/4.x.nix
+++ b/pkgs/development/python-modules/sip/4.x.nix
@@ -14,7 +14,7 @@
 buildPythonPackage rec {
   pname = sip-module;
   version = "4.19.25";
-  format = "other";
+  pyproject = false;
 
   disabled = isPyPy;
 
diff --git a/pkgs/development/python-modules/sss/default.nix b/pkgs/development/python-modules/sss/default.nix
index 69055cb1d1e2..17da8e3e87b4 100644
--- a/pkgs/development/python-modules/sss/default.nix
+++ b/pkgs/development/python-modules/sss/default.nix
@@ -17,7 +17,7 @@ buildPythonPackage {
   pname = "sss";
   inherit (sssdForPython) version;
 
-  format = "other";
+  pyproject = false;
   dontUnpack = true;
   dontBuild = true;
 
diff --git a/pkgs/development/python-modules/stestr/tests.nix b/pkgs/development/python-modules/stestr/tests.nix
index d83533d8a34e..6ea09baeadd9 100644
--- a/pkgs/development/python-modules/stestr/tests.nix
+++ b/pkgs/development/python-modules/stestr/tests.nix
@@ -3,7 +3,7 @@
 buildPythonPackage {
   pname = "stestr-tests";
   inherit (stestr) version src;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/stevedore/tests.nix b/pkgs/development/python-modules/stevedore/tests.nix
index 4a07c9555fa4..48c8a2bf0fc3 100644
--- a/pkgs/development/python-modules/stevedore/tests.nix
+++ b/pkgs/development/python-modules/stevedore/tests.nix
@@ -8,7 +8,7 @@
 buildPythonPackage {
   pname = "stevedore-tests";
   inherit (stevedore) version src;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/uranium/default.nix b/pkgs/development/python-modules/uranium/default.nix
index 8c621c008205..96ce10f8da79 100644
--- a/pkgs/development/python-modules/uranium/default.nix
+++ b/pkgs/development/python-modules/uranium/default.nix
@@ -18,7 +18,7 @@
 buildPythonPackage rec {
   version = "4.12.0";
   pname = "uranium";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Ultimaker";
diff --git a/pkgs/development/python-modules/uvicorn/tests.nix b/pkgs/development/python-modules/uvicorn/tests.nix
index 33eb1564aa76..5ccd792db691 100644
--- a/pkgs/development/python-modules/uvicorn/tests.nix
+++ b/pkgs/development/python-modules/uvicorn/tests.nix
@@ -15,7 +15,7 @@
 buildPythonPackage {
   pname = "uvicorn-tests";
   inherit (uvicorn) version;
-  format = "other";
+  pyproject = false;
 
   src = uvicorn.testsout;
 
diff --git a/pkgs/development/python-modules/wagtail-factories/tests.nix b/pkgs/development/python-modules/wagtail-factories/tests.nix
index 2b4c75844032..e71d6131c637 100644
--- a/pkgs/development/python-modules/wagtail-factories/tests.nix
+++ b/pkgs/development/python-modules/wagtail-factories/tests.nix
@@ -9,7 +9,7 @@
 
 buildPythonPackage {
   pname = "wagtail-factories-tests";
-  format = "other";
+  pyproject = false;
   inherit (wagtail-factories) src version;
 
   dontBuild = true;
diff --git a/pkgs/development/python-modules/wagtail/tests.nix b/pkgs/development/python-modules/wagtail/tests.nix
index 7f44c13aed74..57409bb6eb81 100644
--- a/pkgs/development/python-modules/wagtail/tests.nix
+++ b/pkgs/development/python-modules/wagtail/tests.nix
@@ -19,7 +19,7 @@
 buildPythonPackage {
   pname = "wagtail-tests";
   inherit (wagtail) src version;
-  format = "other";
+  pyproject = false;
 
   dontBuild = true;
   dontInstall = true;
diff --git a/pkgs/development/python-modules/wxpython/4.2.nix b/pkgs/development/python-modules/wxpython/4.2.nix
index bcb2c5bce16a..46b7601844df 100644
--- a/pkgs/development/python-modules/wxpython/4.2.nix
+++ b/pkgs/development/python-modules/wxpython/4.2.nix
@@ -51,7 +51,7 @@
 buildPythonPackage rec {
   pname = "wxpython";
   version = "4.2.4";
-  format = "other";
+  pyproject = false;
 
   src = fetchPypi {
     inherit pname version;
diff --git a/pkgs/development/python-modules/xapian/default.nix b/pkgs/development/python-modules/xapian/default.nix
index a5ce667e34a1..94934ea0041d 100644
--- a/pkgs/development/python-modules/xapian/default.nix
+++ b/pkgs/development/python-modules/xapian/default.nix
@@ -13,7 +13,7 @@ in
 buildPythonPackage rec {
   pname = "xapian";
   inherit (xapian) version;
-  format = "other";
+  pyproject = false;
 
   src = fetchurl {
     url = "https://oligarchy.co.uk/xapian/${version}/xapian-bindings-${version}.tar.xz";
diff --git a/pkgs/development/tools/misc/cvise/default.nix b/pkgs/development/tools/misc/cvise/default.nix
index 06563d379de2..9c170e7c3ea9 100644
--- a/pkgs/development/tools/misc/cvise/default.nix
+++ b/pkgs/development/tools/misc/cvise/default.nix
@@ -20,7 +20,7 @@
 buildPythonApplication rec {
   pname = "cvise";
   version = "2.12.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "marxin";
diff --git a/pkgs/os-specific/linux/cpupower-gui/default.nix b/pkgs/os-specific/linux/cpupower-gui/default.nix
index 0711f7e77b80..a0f17481a92c 100644
--- a/pkgs/os-specific/linux/cpupower-gui/default.nix
+++ b/pkgs/os-specific/linux/cpupower-gui/default.nix
@@ -27,7 +27,7 @@ buildPythonApplication rec {
   version = "1.0.0";
 
   # This packages doesn't have a setup.py
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "vagnum08";
diff --git a/pkgs/servers/home-assistant/tests.nix b/pkgs/servers/home-assistant/tests.nix
index e4d03fa3f9da..cd1b85c7f3d1 100644
--- a/pkgs/servers/home-assistant/tests.nix
+++ b/pkgs/servers/home-assistant/tests.nix
@@ -236,8 +236,7 @@ lib.listToAttrs (
     lib.nameValuePair component (
       home-assistant.overridePythonAttrs (old: {
         pname = "homeassistant-test-${component}";
-        pyproject = null;
-        format = "other";
+        pyproject = false;
 
         dontBuild = true;
         dontInstall = true;
diff --git a/pkgs/servers/monitoring/nagios-plugins/check_esxi_hardware/default.nix b/pkgs/servers/monitoring/nagios-plugins/check_esxi_hardware/default.nix
index 5337a71a85cc..a927227d90e7 100644
--- a/pkgs/servers/monitoring/nagios-plugins/check_esxi_hardware/default.nix
+++ b/pkgs/servers/monitoring/nagios-plugins/check_esxi_hardware/default.nix
@@ -7,7 +7,7 @@
 python3Packages.buildPythonApplication rec {
   pname = "check-esxi-hardware";
   version = "20250716";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "Napsty";
diff --git a/pkgs/servers/monitoring/prometheus/bitcoin-exporter.nix b/pkgs/servers/monitoring/prometheus/bitcoin-exporter.nix
index 9b5be064e5a7..a17a7ce5dc69 100644
--- a/pkgs/servers/monitoring/prometheus/bitcoin-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/bitcoin-exporter.nix
@@ -8,7 +8,7 @@ python3Packages.buildPythonApplication rec {
   pname = "bitcoin-prometheus-exporter";
   version = "0.9.0";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "jvstein";
diff --git a/pkgs/servers/monitoring/prometheus/sabnzbd-exporter.nix b/pkgs/servers/monitoring/prometheus/sabnzbd-exporter.nix
index 6c74b7a9c581..3e337dbf9bf0 100644
--- a/pkgs/servers/monitoring/prometheus/sabnzbd-exporter.nix
+++ b/pkgs/servers/monitoring/prometheus/sabnzbd-exporter.nix
@@ -9,7 +9,7 @@ python3Packages.buildPythonApplication rec {
   pname = "sabnzbd_exporter";
   version = "0.1.80";
 
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "msroest";
diff --git a/pkgs/servers/persistent-evdev/default.nix b/pkgs/servers/persistent-evdev/default.nix
index be068d8ccdc8..d7fd26d134b3 100644
--- a/pkgs/servers/persistent-evdev/default.nix
+++ b/pkgs/servers/persistent-evdev/default.nix
@@ -10,7 +10,7 @@
 buildPythonPackage rec {
   pname = "persistent-evdev";
   version = "unstable-2022-05-07";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "aiberia";
diff --git a/pkgs/servers/tautulli/default.nix b/pkgs/servers/tautulli/default.nix
index ab9d07d9056d..f2f059be025e 100644
--- a/pkgs/servers/tautulli/default.nix
+++ b/pkgs/servers/tautulli/default.nix
@@ -10,7 +10,7 @@
 buildPythonApplication rec {
   pname = "Tautulli";
   version = "2.16.0";
-  format = "other";
+  pyproject = false;
 
   pythonPath = [ setuptools ];
   nativeBuildInputs = [
diff --git a/pkgs/tools/networking/dnschef/default.nix b/pkgs/tools/networking/dnschef/default.nix
index 093005ed979e..acee093c2758 100644
--- a/pkgs/tools/networking/dnschef/default.nix
+++ b/pkgs/tools/networking/dnschef/default.nix
@@ -16,7 +16,7 @@ buildPythonApplication {
     sha256 = "0ll3hw6w5zhzyqc2p3c9443gcp12sx6ddybg5rjpl01dh3svrk1q";
   };
 
-  format = "other";
+  pyproject = false;
   installPhase = ''
     install -D ./dnschef.py $out/bin/dnschef
   '';
diff --git a/pkgs/tools/networking/namespaced-openvpn/default.nix b/pkgs/tools/networking/namespaced-openvpn/default.nix
index ce74cd82937a..a19e2aa53903 100644
--- a/pkgs/tools/networking/namespaced-openvpn/default.nix
+++ b/pkgs/tools/networking/namespaced-openvpn/default.nix
@@ -11,7 +11,7 @@
 buildPythonPackage rec {
   pname = "namespaced-openvpn";
   version = "0.6.0";
-  format = "other";
+  pyproject = false;
 
   src = fetchFromGitHub {
     owner = "slingamn";
diff --git a/pkgs/tools/typesetting/tex/texlive/bin.nix b/pkgs/tools/typesetting/tex/texlive/bin.nix
index 40f1596302fe..ae4917f9996b 100644
--- a/pkgs/tools/typesetting/tex/texlive/bin.nix
+++ b/pkgs/tools/typesetting/tex/texlive/bin.nix
@@ -659,7 +659,7 @@ rec {
   pygmentex = python3Packages.buildPythonApplication rec {
     pname = "pygmentex";
     inherit (src) version;
-    format = "other";
+    pyproject = false;
 
     src = assertFixedHash pname texlive.pkgs.pygmentex.tex;