diff --git a/build-constraints.yaml b/build-constraints.yaml
index 8e3e2696..7843c1cb 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2632,7 +2632,7 @@ packages:
         - yes-precure5-command
         - th-strict-compat
         - main-tester
-        - skews
+        - skews < 0 # iij-ii/direct-hs#75
         - wss-client < 0
         - network-messagepack-rpc
         - network-messagepack-rpc-websocket < 0