these 2 derivations will be built:
  /nix/store/llp1hszfzpywa2xf3cm6rdh16y677hn0-closure-info.drv
  /nix/store/kh3m14462246fp3a6fn6d5gh9cmv3qs6-check-vars.drv
error: path '/nix/store/srm5hrpm0hpbwbpp6gfhh7827c8qy84y-check-vars' is not valid
error: Cannot build '/nix/store/kh3m14462246fp3a6fn6d5gh9cmv3qs6-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/srm5hrpm0hpbwbpp6gfhh7827c8qy84y-check-vars