diff --git a/build-constraints.yaml b/build-constraints.yaml
index c9ab5308..7ff1e1e2 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -849,7 +849,7 @@ packages:
         - perfect-hash-generator
 
     "Alan Zimmerman @alanz":
-        - ghc-exactprint
+        - ghc-exactprint < 1.1  # https://github.com/commercialhaskell/stackage/issues/6177
         - haskell-lsp
         - hjsmin
         - language-javascript