diff --git a/build-constraints.yaml b/build-constraints.yaml
index a723a083..ebd6d773 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1576,6 +1576,7 @@ packages:
         - cheapskate-highlight
         - Spock-lucid
         - charsetdetect-ae
+        - ilist
 
     "Takano Akio aljee@hyper.cx @takano-akio":
         # GHC 8 - fast-builder