diff --git a/build-constraints.yaml b/build-constraints.yaml
index 66b7b256..03134157 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1144,9 +1144,6 @@ packages:
         # https://github.com/gtk2hs/gtk2hs/issues/109
         - gtk < 0.13.8
 
-        # https://github.com/fpco/stackage/issues/639
-        - mainland-pretty < 0.3
-
         # https://github.com/fpco/stackage/issues/646
         - clock < 0.5