diff --git a/src/parser.py b/src/parser.py
index 2e1d647..473edd8 100644
--- a/src/parser.py
+++ b/src/parser.py
@@ -96,7 +96,7 @@ class Parser(object):
         if app.experiment:
             logger.debug("Using experimental features")
             args.append("--experimental")
-        args[1::2] = map(lambda i: self.config.temp_folder.joinpath(i), args[1::2])
+        args[1::2] = map(self.config.temp_folder.joinpath, args[1::2])
         if self.config.ci_test:
             self.exclude_all_patches()
         if self._PATCHES: