treewide: migrate to pythonPackages.unittestCheckHook

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

@@ -9,6 +9,7 @@
 , regex
 , tabview
 , python
+, unittestCheckHook
 }:
 
 buildPythonPackage rec {
@@ -33,26 +34,29 @@ buildPythonPackage rec {
     tabview
   ];
 
+  checkInputs = [ unittestCheckHook ];
+
   pythonImportsCheck = [
     "clevercsv"
     "clevercsv.cparser"
   ];
 
-  checkPhase = ''
+  preCheck = ''
     # by linking the installed version the tests also have access to compiled native libraries
     rm -r clevercsv
     ln -s $out/${python.sitePackages}/clevercsv/ clevercsv
-    # their ci only runs unit tests, there are also integration and fuzzing tests
-    ${python.interpreter} -m unittest discover -v -f -s ./tests/test_unit
   '';
 
+  # their ci only runs unit tests, there are also integration and fuzzing tests
+  unittestFlagsArray = [ "-v" "-f" "-s" "./tests/test_unit" ];
+
   meta = with lib; {
     description = "CleverCSV is a Python package for handling messy CSV files";
     longDescription = ''
-       CleverCSV is a Python package for handling messy CSV files. It provides
-       a drop-in replacement for the builtin CSV module with improved dialect
-       detection, and comes with a handy command line application for working
-       with CSV files.
+      CleverCSV is a Python package for handling messy CSV files. It provides
+      a drop-in replacement for the builtin CSV module with improved dialect
+      detection, and comes with a handy command line application for working
+      with CSV files.
     '';
     homepage = "https://github.com/alan-turing-institute/CleverCSV";
     changelog = "https://github.com/alan-turing-institute/CleverCSV/blob/master/CHANGELOG.md";