diff --git a/pkgs/by-name/de/devede/package.nix b/pkgs/by-name/de/devede/package.nix
index 12b452c4e33a..e70579c59119 100644
--- a/pkgs/by-name/de/devede/package.nix
+++ b/pkgs/by-name/de/devede/package.nix
@@ -11,7 +11,6 @@
   wrapGAppsHook3,
   gdk-pixbuf,
   gobject-introspection,
-  nix-update-script,
 }:
 
 let
@@ -28,7 +27,7 @@ in
 buildPythonApplication (finalAttrs: {
   pname = "devede";
   version = "4.21.3.1";
-  format = "pyproject";
+  pyproject = true;
   namePrefix = "";
 
   src = fetchFromGitLab {
diff --git a/pkgs/by-name/je/jello-lang/package.nix b/pkgs/by-name/je/jello-lang/package.nix
index 38ed8612c932..a79bf87162eb 100644
--- a/pkgs/by-name/je/jello-lang/package.nix
+++ b/pkgs/by-name/je/jello-lang/package.nix
@@ -10,7 +10,7 @@
 python3Packages.buildPythonApplication {
   pname = "jello-lang";
   version = "0-unstable-2025-01-07";
-  format = "pyproject";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "codereport";
diff --git a/pkgs/by-name/je/jellyfish/package.nix b/pkgs/by-name/je/jellyfish/package.nix
index 99613f9960db..0b00dcd4f722 100644
--- a/pkgs/by-name/je/jellyfish/package.nix
+++ b/pkgs/by-name/je/jellyfish/package.nix
@@ -8,7 +8,7 @@
 python3Packages.buildPythonApplication {
   pname = "jellyfish";
   version = "0-unstable-2024-05-27";
-  format = "pyproject";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "codereport";
diff --git a/pkgs/by-name/ne/neuron/package.nix b/pkgs/by-name/ne/neuron/package.nix
index 9b3d54ccbe30..9a721411cecb 100644
--- a/pkgs/by-name/ne/neuron/package.nix
+++ b/pkgs/by-name/ne/neuron/package.nix
@@ -28,8 +28,8 @@ stdenv.mkDerivation (finalAttrs: {
   pname = "neuron";
   version = "8.2.7";
 
-  # format is for pythonModule conversion
-  format = "other";
+  # pyproject is for pythonModule conversion
+  pyproject = false;
 
   nativeBuildInputs = [
     cmake
diff --git a/pkgs/development/python-modules/aliyun-python-sdk-alimt/default.nix b/pkgs/development/python-modules/aliyun-python-sdk-alimt/default.nix
index 0cf8c0d931e7..ccb5ac809695 100644
--- a/pkgs/development/python-modules/aliyun-python-sdk-alimt/default.nix
+++ b/pkgs/development/python-modules/aliyun-python-sdk-alimt/default.nix
@@ -9,7 +9,7 @@
 buildPythonPackage rec {
   pname = "aliyun-python-sdk-alimt";
   version = "3.2.0";
-  format = "pyproject";
+  pyproject = true;
 
   # Upstream doesn't tag releases on Github
   # https://github.com/aliyun/aliyun-openapi-python-sdk/issues/551
diff --git a/pkgs/development/python-modules/flask-sqlalchemy/default.nix b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
index 7ca65ea6b18a..1645ffa46f12 100644
--- a/pkgs/development/python-modules/flask-sqlalchemy/default.nix
+++ b/pkgs/development/python-modules/flask-sqlalchemy/default.nix
@@ -14,7 +14,7 @@
 buildPythonPackage rec {
   pname = "flask-sqlalchemy";
   version = "3.1.1";
-  format = "pyproject";
+  pyproject = true;
 
   src = fetchPypi {
     pname = "flask_sqlalchemy";
diff --git a/pkgs/development/python-modules/issubclass/default.nix b/pkgs/development/python-modules/issubclass/default.nix
index 041ec408e62e..83629c2da99b 100644
--- a/pkgs/development/python-modules/issubclass/default.nix
+++ b/pkgs/development/python-modules/issubclass/default.nix
@@ -8,7 +8,7 @@
 buildPythonPackage rec {
   pname = "issubclass";
   version = "0.1.2";
-  format = "pyproject";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "zmievsa";
diff --git a/pkgs/development/python-modules/retryhttp/default.nix b/pkgs/development/python-modules/retryhttp/default.nix
index 8cc37882c709..872bdd24c2db 100644
--- a/pkgs/development/python-modules/retryhttp/default.nix
+++ b/pkgs/development/python-modules/retryhttp/default.nix
@@ -16,7 +16,7 @@
 buildPythonPackage rec {
   pname = "retryhttp";
   version = "1.3.1";
-  format = "pyproject";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "austind";
diff --git a/pkgs/development/python-modules/svcs/default.nix b/pkgs/development/python-modules/svcs/default.nix
index 08a1452b9bfb..367129a4fadb 100644
--- a/pkgs/development/python-modules/svcs/default.nix
+++ b/pkgs/development/python-modules/svcs/default.nix
@@ -23,7 +23,7 @@
 buildPythonPackage rec {
   pname = "svcs";
   version = "25.1.0";
-  format = "pyproject";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "hynek";