1 files changed, 2 insertions, 2 deletions
diff --git a/nixpkgs/pkgs/development/python-modules/psygnal/default.nix b/nixpkgs/pkgs/development/python-modules/psygnal/default.nix
index 36ae22a67b68..890d397c532f 100644
--- a/nixpkgs/pkgs/development/python-modules/psygnal/default.nix
+++ b/nixpkgs/pkgs/development/python-modules/psygnal/default.nix
@@ -11,6 +11,7 @@
 , toolz
 , typing-extensions
 , wrapt
+, attrs
 }:
 
 buildPythonPackage rec {
@@ -27,8 +28,6 @@ buildPythonPackage rec {
     hash = "sha256-eDfGWmTKJrkkzRy1I3wl3WYPCxtPHSRzqAoOiO7QQ9Y=";
   };
 
-  SETUPTOOLS_SCM_PRETEND_VERSION = version;
-
   buildInputs = [
     hatch-vcs
     hatchling
@@ -45,6 +44,7 @@ buildPythonPackage rec {
     pytestCheckHook
     toolz
     wrapt
+    attrs
   ];
 
   pythonImportsCheck = [