diff --git a/lib/happy-lib.cabal b/lib/happy-lib.cabal
index cfccd29a..8a583cbc 100644
--- a/lib/happy-lib.cabal
+++ b/lib/happy-lib.cabal
@@ -1,4 +1,5 @@
-cabal-version: 3.0
+cabal-version: 3.4
+  -- build is broken in 3.2; see #311
 name: happy-lib
 version: 2.0.1
 license: BSD-2-Clause