these 2 derivations will be built:
  /nix/store/1mb1jsgiv328icv716546m8z4cqmnjp9-closure-info.drv
  /nix/store/5668nvw9cf713lz726vcfysbqz10zpr4-check-vars.drv
error: path '/nix/store/ihnz730fk5kb5s3xdnnga811hb7n55mb-check-vars' is not valid
error: Cannot build '/nix/store/5668nvw9cf713lz726vcfysbqz10zpr4-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ihnz730fk5kb5s3xdnnga811hb7n55mb-check-vars