pythonPackages.ufoprocessor: fix test execution

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

@@ -26,9 +26,14 @@ buildPythonPackage rec {
     mutatormath
   ];
 
-  # tests require custom commands to run
-  doCheck = false;
-  pythonImportsCheck = [ "ufoProcessor" ];
+  checkPhase = ''
+    runHook preCheck
+    for t in Tests/*.py; do
+      # https://github.com/LettError/ufoProcessor/issues/32
+      [[ "$(basename "$t")" = "tests_fp.py" ]] || python "$t"
+    done
+    runHook postCheck
+  '';
 
   meta = with lib; {
     description = "Read, write and generate UFOs with designspace data";