diff --git a/build-constraints.yaml b/build-constraints.yaml
index e2a026b0..b91e20c0 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2670,7 +2670,7 @@ packages:
         - flac
         - flac-picture
         - forma
-        - ghc-syntax-highlighter
+        - ghc-syntax-highlighter < 9
         - hspec-megaparsec
         - htaglib
         - html-entity-map