diff --git a/build-constraints.yaml b/build-constraints.yaml
index 16a5fbd7..891d6945 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -446,6 +446,7 @@ packages:
         - hinotify
         - hfsevents
         - Win32-notify
+        - windns
 
         - mono-traversable
         - http-client
@@ -3752,7 +3753,10 @@ package-flags:
         five-three: true
 
     greskell:
-      hint-test: false
+        hint-test: false
+
+    windns:
+        allow-non-windows: true
 
 # end of package-flags