diff --git a/build-helpers/loopy.spec b/build-helpers/loopy.spec
index 14116ec539381137e0423855550773a43ad423d6..4649b1425ca83c2883735de2920937582b2ea263 100644
--- a/build-helpers/loopy.spec
+++ b/build-helpers/loopy.spec
@@ -19,6 +19,7 @@ a = Analysis(['../bin/loopy'],
                 "packaging.markers",
                 "packaging.specifiers",
                 "packaging.version",
+                "packaging.requirements",
                 ],
              hookspath=None,
              runtime_hooks=None,