diff --git a/build-constraints.yaml b/build-constraints.yaml
index a659fb8c..8e90f1af 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1067,7 +1067,8 @@ packages:
     "Jens Petersen <juhpetersen@gmail.com> @juhp":
         - cabal-rpm
         # - cabal-sort # BLOCKED directory 1.3
-        # - idris # bounds: safe
+        - idris # bounds: safe
+        - libffi
         - xmonad-contrib
         - shelly