diff --git a/build-constraints.yaml b/build-constraints.yaml
index 90684659..aded36c5 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2072,6 +2072,7 @@ packages:
         - b9 < 0 # build failure with GHC 8.4 https://github.com/sheyll/b9-vm-image-builder/issues/4
         - type-spec
         - pretty-types
+        - function-builder
 
     "Jakub Fijałkowski <kuba@codinginfinity.me> @jakubfijalkowski":
         - hlibsass