these 2 derivations will be built:
  /nix/store/1ljs7fpv5g8wl3y9nqk0b8q2fhj576v6-closure-info.drv
  /nix/store/kxkka0gzk4iw8hlkxapc2hsh3rdlhpgl-check-vars.drv
error: path '/nix/store/7ixfb3k1gywjgdcl008yhf8a5vhz65zx-check-vars' is not valid
error: Cannot build '/nix/store/kxkka0gzk4iw8hlkxapc2hsh3rdlhpgl-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/7ixfb3k1gywjgdcl008yhf8a5vhz65zx-check-vars