diff --git a/pkgs/development/python-modules/pysigma/default.nix b/pkgs/development/python-modules/pysigma/default.nix
index 5561fb427cf6..bf7a00dd8fe1 100644
--- a/pkgs/development/python-modules/pysigma/default.nix
+++ b/pkgs/development/python-modules/pysigma/default.nix
@@ -32,12 +32,12 @@ buildPythonPackage rec {
     "packaging"
   ];
 
-  nativeBuildInputs = [
+  build-system = [
     poetry-core
     pythonRelaxDepsHook
   ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     jinja2
     packaging
     pyparsing