diff --git a/build-constraints.yaml b/build-constraints.yaml
index 62a37148..c6baee76 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3234,6 +3234,9 @@ packages:
         - http-conduit < 2.3.0
         - hoogle < 5.0.17
 
+        # https://github.com/fpco/stackage/issues/3208
+        - hpack < 0.22.0
+
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of