{lib}: {
  /**
  Get a list of patches from a path.
  */
  patchesInPath = path: let
    pathContents = builtins.readDir path;
    filter = name: value:
      (value == "regular" || value == "symlink") && lib.strings.hasSuffix ".patch" name;
    filteredContents = lib.attrsets.filterAttrs filter pathContents;
    patchFilenames = builtins.attrNames filteredContents;
  in
    builtins.map (value: lib.path.append path value) patchFilenames;
}