diff --git a/pkgs/development/python-modules/twentemilieu/default.nix b/pkgs/development/python-modules/twentemilieu/default.nix
index a8a0fd0c99a6..425b7eddfe99 100644
--- a/pkgs/development/python-modules/twentemilieu/default.nix
+++ b/pkgs/development/python-modules/twentemilieu/default.nix
@@ -26,7 +26,8 @@ buildPythonPackage rec {
 
   postPatch = ''
     substituteInPlace pyproject.toml \
-      --replace "--cov" ""
+      --replace "--cov" "" \
+      --replace '"0.0.0"' '"${version}"'
   '';
 
   nativeBuildInputs = [