diff --git a/build-constraints.yaml b/build-constraints.yaml
index 1dec9d81..1ec17a74 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2080,6 +2080,7 @@ packages:
 
     "Peter Simons <simons@cryp.to> @peti":
         - cabal2nix
+        - cabal2spec
         - distribution-nixpkgs
         - funcmp
         - hackage-db