diff --git a/build-constraints.yaml b/build-constraints.yaml
index e22a6733..da7711c9 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -8198,6 +8198,7 @@ expected-test-failures:
     - protobuf # 0.2.1.3
     - record-wrangler # 0.1.1.0
     - relapse # 1.0.0.0 #5948/closed
+    - safe-coloured-text-gen # 0.0.0.0 https://github.com/commercialhaskell/stackage/issues/6633
     - secp256k1-haskell # #5948/closed
     - servant-static-th # 1.0.0.0 Tasty issue: https://github.com/commercialhaskell/stackage/issues/6090
     - snappy # Could not find module ‘Functions’