anchor.diff:          map (path: "substituteInPlace ${path} --replace '${search}' \"${replacement}\"") where;
         mkEnsureSubstituted = { replacement, search, where }:
           ''
  -          if [[ $(grep -r '${search}' | grep -v "${replacement}" | grep -v NEWS | wc -l) -gt 0 ]]; then
  -            echo "Not all references to '${search}' have been replace. Found the following matches:"
  -            grep '${search}' -r | grep -v "${replacement}" | grep -v NEWS
  +          if [[ $(grep -r '${search}' | grep -v "${replacement}" | grep -Ev 'NEWS|^test/' | wc -l) -gt 0 ]]; then
  +            echo "Not all references to '${search}' have been replaced. Found the following matches:"
  +            grep '${search}' -r | grep -v "${replacement}" | grep -Ev 'NEWS|^test/'
               exit 1
             fi
           '';
  
positive.code:           replacement = "$out/lib/systemd/systemd-fsck";
            where = [
              "man/systemd-fsck@.service.xml"
              "test/test-fstab-generator.sh"
              "test/test-fstab-generator/test-12-dev-sdx.expected/systemd-fsck-root.service"
              "test/test-fstab-generator/test-13-label.expected/systemd-fsck-root.service"
              "test/test-fstab-generator/test-14-uuid.expected/systemd-fsck-root.service"
              "test/test-fstab-generator/test-15-partuuid.expected/systemd-fsck-root.service"
            ];
          }
        ] ++ lib.optionals withImportd [
  
negative.code:             "src/analyze/test-verify.c"
              "src/test/test-env-file.c"
              "src/test/test-fileio.c"
            ];
          }
          {
  