these 2 derivations will be built:
  /nix/store/g7hqxkkgmhxbr75985dsh0vf061687as-closure-info.drv
  /nix/store/f48z8gm6mr8lkm5yzqn9pmwifrvp7baa-check-vars.drv
error: path '/nix/store/z7anv9n0iw9a6350dn1h1qz3v3iiwwph-check-vars' is not valid
error: Cannot build '/nix/store/f48z8gm6mr8lkm5yzqn9pmwifrvp7baa-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/z7anv9n0iw9a6350dn1h1qz3v3iiwwph-check-vars