diff --git a/pkgs/development/python-modules/pyscss/default.nix b/pkgs/development/python-modules/pyscss/default.nix
index c3731ea6d970..188606347524 100644
--- a/pkgs/development/python-modules/pyscss/default.nix
+++ b/pkgs/development/python-modules/pyscss/default.nix
@@ -6,7 +6,7 @@
   six,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "pyscss";
   version = "1.4.0";
   format = "setuptools";
@@ -14,7 +14,7 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     repo = "pyScss";
     owner = "Kronuz";
-    tag = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-z0y4z+/JE6rZWHAvps/taDZvutyVhxxs2gMujV5rNu4=";
   };
 
@@ -32,4 +32,4 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = [ ];
   };
-}
+})