diff --git a/build-constraints.yaml b/build-constraints.yaml
index 74e79394..8240c252 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3401,6 +3401,7 @@ packages:
 
         # https://github.com/fpco/stackage/issues/2878
         - hackage-db < 2.0
+        - cabal2nix < 2.6
 
         # https://github.com/fpco/stackage/issues/2894
         - marvin < 0.2.4