diff --git a/pkgs/development/python-modules/pypng/default.nix b/pkgs/development/python-modules/pypng/default.nix
index 968e9310318a..129300b08158 100644
--- a/pkgs/development/python-modules/pypng/default.nix
+++ b/pkgs/development/python-modules/pypng/default.nix
@@ -2,6 +2,7 @@
 , buildPythonPackage
 , fetchFromGitHub
 , pytestCheckHook
+, setuptools
 }:
 
 buildPythonPackage rec {
@@ -12,10 +13,14 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "drj11";
     repo = "pypng";
-    rev = "${pname}-${version}";
+    rev = "refs/tags/${pname}-${version}";
     sha256 = "sha256-JU1GCSTm2s6Kczn6aRcF5DizPJVpizNtnAMJxTBi9vo=";
   };
 
+  nativeBuildInputs = [
+    setuptools
+  ];
+
   pythonImportsCheck = [ "png" ];
 
   checkInputs = [ pytestCheckHook ];