these 4 derivations will be built:
  /nix/store/3g27kkg3zpisl0awwfy8705a4wqm9k9v-clan-cli-source.drv
  /nix/store/mnf6fic3qrav901s7bdv6yvy9k07vlc6-closure-info.drv
  /nix/store/xvlgynz7l424apzjdfkg17izkhw4qzhx-clan-cli.drv
  /nix/store/ydphc0z6pgr48kzw7l66b4a5qbrk01k2-check-vars.drv
error: path '/nix/store/qas1h9pday409wbiks924rw5c1j4d9ca-check-vars' is not valid
error: Cannot build '/nix/store/ydphc0z6pgr48kzw7l66b4a5qbrk01k2-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/qas1h9pday409wbiks924rw5c1j4d9ca-check-vars