python3Packages.gflanguages: convert to PEP-517 style

pkgs/development/python-modules/gflanguages/default.nix

@@ -5,6 +5,7 @@
 , pytestCheckHook
 , pythonOlder
 , pythonRelaxDepsHook
+, setuptools
 , setuptools-scm
 , uharfbuzz
 , youseedee
@@ -13,7 +14,6 @@
 buildPythonPackage rec {
   pname = "gflanguages";
   version = "0.5.17";
-  format = "setuptools";
 
   disabled = pythonOlder "3.7";
 
@@ -22,6 +22,8 @@ buildPythonPackage rec {
     hash = "sha256-dScgRQ6usjSqV0FqDyP+KGvHL06wlTFVcO+MmZ2NMAs=";
   };
 
+  pyproject = true;
+
   # Relax the dependency on protobuf 3. Other packages in the Google Fonts
   # ecosystem have begun upgrading from protobuf 3 to protobuf 4,
   # so we need to use protobuf 4 here as well to avoid a conflict
@@ -30,11 +32,12 @@ buildPythonPackage rec {
     "protobuf"
   ];
 
-  nativeBuildInputs = [
+  build-system = [
+    setuptools
     setuptools-scm
   ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     protobuf
   ];