diff --git a/pkgs/development/python-modules/generic/default.nix b/pkgs/development/python-modules/generic/default.nix
index d0234c29ed9..9dedd3ceae7 100644
--- a/pkgs/development/python-modules/generic/default.nix
+++ b/pkgs/development/python-modules/generic/default.nix
@@ -163,7 +163,6 @@ python.stdenv.mkDerivation (attrs // {
     export PYTHONPATH="/tmp/$name/lib/${python.libPrefix}/site-packages:$PYTHONPATH"
     python setup.py develop --prefix /tmp/$name
     ${postShellHook}
-    return
   '';
 
   meta = with lib.maintainers; {