diff --git a/build-constraints.yaml b/build-constraints.yaml
index a82abd25..ef09a17d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3309,6 +3309,9 @@ packages:
         - brick < 0.21
         - word-wrap < 0.2
 
+        # https://github.com/fpco/stackage/issues/2740
+        - fgl < 5.6
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of