diff --git a/build-constraints.yaml b/build-constraints.yaml
index adc9718e..5bde2dff 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3459,6 +3459,9 @@ packages:
 
         # https://github.com/fpco/stackage/issues/3650
         - haddock-library < 1.6.0
+
+        # https://github.com/tonyday567/numhask/issues/55
+        - numhask < 0.2.2
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of