diff --git a/pkgs/development/python-modules/trsfile/default.nix b/pkgs/development/python-modules/trsfile/default.nix
index ccfb61c7695b..8806087725b9 100644
--- a/pkgs/development/python-modules/trsfile/default.nix
+++ b/pkgs/development/python-modules/trsfile/default.nix
@@ -20,7 +20,7 @@ buildPythonPackage rec {
 
   pyproject = true;
 
-  SETUPTOOLS_SCM_PRETEND_VERSION = version;
+  env.SETUPTOOLS_SCM_PRETEND_VERSION = version;
 
   build-system = [
     setuptools