diff --git a/build-constraints.yaml b/build-constraints.yaml
index 3cc973d1..c3c70b0c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2650,6 +2650,7 @@ packages:
         - hw-fingertree < 0 # build failure with GHC 8.4
         - hw-fingertree-strict
         - hw-json
+        - hw-packed-vector
         - hw-parser
         - hw-prim
         - hw-rankselect