diff --git a/pkgs/development/python-modules/githubkit/default.nix b/pkgs/development/python-modules/githubkit/default.nix
index ad737eb7b3bc..ac9ed0be67d5 100644
--- a/pkgs/development/python-modules/githubkit/default.nix
+++ b/pkgs/development/python-modules/githubkit/default.nix
@@ -37,7 +37,7 @@ buildPythonPackage rec {
       --replace-fail "--cov=githubkit --cov-append --cov-report=term-missing" ""
   '';
 
-  build-systems = [
+  build-system = [
     poetry-core
     pythonRelaxDepsHook
   ];