diff --git a/pkgs/development/python-modules/pkutils/default.nix b/pkgs/development/python-modules/pkutils/default.nix
index 6ca68dbe6245..e626c9bd587c 100644
--- a/pkgs/development/python-modules/pkutils/default.nix
+++ b/pkgs/development/python-modules/pkutils/default.nix
@@ -3,6 +3,7 @@
 , fetchFromGitHub
 , nose
 , pythonOlder
+, pythonRelaxDepsHook
 , semver
 }:
 
@@ -16,10 +17,18 @@ buildPythonPackage rec {
   src = fetchFromGitHub {
     owner = "reubano";
     repo = "pkutils";
-    rev = "v${version}";
+    rev = "refs/tags/v${version}";
     hash = "sha256-AK+xX+LPz6IVLZedsqMUm7G28ue0s3pXgIzxS4EHHLE=";
   };
 
+  pythonRelaxDeps = [
+    "semver"
+  ];
+
+  nativeBuildInputs = [
+    pythonRelaxDepsHook
+  ];
+
   propagatedBuildInputs = [
     semver
   ];