diff --git a/build-constraints.yaml b/build-constraints.yaml
index d41f0f18..a5975479 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1525,6 +1525,7 @@ packages:
         # GHC 8 - conduit-parse
         # GHC 8 - opml-conduit
         # GHC 8 - rss-conduit
+        - imm
         - timerep
         # GHC 8 - xml-conduit-parse