diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6a9ee552..204f869c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3500,6 +3500,9 @@ packages:
         # https://github.com/fpco/stackage/issues/3001
         - brick < 0.29
 
+        # https://github.com/fpco/stackage/issues/3006
+        - unix-compat < 0.5
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of