diff --git a/build-constraints.yaml b/build-constraints.yaml
index 945c10b4..dc7f2d38 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3311,6 +3311,7 @@ packages:
 
         # https://github.com/fpco/stackage/issues/2740
         - fgl < 5.6
+        - fgl < 5.5.4 # 5.5.4 breaks Taxonomy, https://github.com/eggzilla/Taxonomy/issues/1
 
 # end of packages