diff --git a/build-constraints.yaml b/build-constraints.yaml
index f6c7b913..5bf17dba 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7440,6 +7440,7 @@ skipped-tests:
     - cron # Could not deduce (SOP.All (SOP.All Arbitrary) xss) arising from a use of ‘SOP.hcpure’
     - config-ini # https://github.com/aisamanra/config-ini/issues/22
     - dhall # https://github.com/dhall-lang/dhall-haskell/issues/1985
+    - mixed-types-num # https://github.com/commercialhaskell/stackage/issues/6005
 
     # Runtime issues
     - blank-canvas # Never finishes https://github.com/ku-fpg/blank-canvas/issues/73