diff --git a/tvix/tools/weave/default.nix b/tvix/tools/weave/default.nix
index 8c5e1be92..3d979b6d3 100644
--- a/tvix/tools/weave/default.nix
+++ b/tvix/tools/weave/default.nix
@@ -6,4 +6,6 @@
       src = depot.tvix.utils.filterRustCrateSrc { root = prev.src.origSrc; };
     };
   };
-}).rootCrate.build
+}).rootCrate.build.overrideAttrs {
+  meta.ci.extraSteps.crate2nix-check = depot.tvix.utils.mkCrate2nixCheck ./Cargo.nix;
+}