these 2 derivations will be built:
  /nix/store/c7dda1kzry10xfpwwksnaq961jkkm9v5-closure-info.drv
  /nix/store/0wikrabd7jpdhkwmvshx88j8xhi862vn-check-vars.drv
error: path '/nix/store/mc7nj7xnn0da824499prhw024qa76ps7-check-vars' is not valid
error: Cannot build '/nix/store/0wikrabd7jpdhkwmvshx88j8xhi862vn-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/mc7nj7xnn0da824499prhw024qa76ps7-check-vars