these 2 derivations will be built:
  /nix/store/cbj4c2inc9jikgyffsnnwhfqiqrz67yi-closure-info.drv
  /nix/store/70nvr1ifj815zii03jv0bbwd7k5cnbbh-check-vars.drv
error: path '/nix/store/mz9zpgn0sdrlr70j4z9m92d0wnx53ks6-check-vars' is not valid
error: Cannot build '/nix/store/70nvr1ifj815zii03jv0bbwd7k5cnbbh-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/mz9zpgn0sdrlr70j4z9m92d0wnx53ks6-check-vars