these 5 derivations will be built:
  /nix/store/3x93gmlgd0m2mvggb348zp3wiziy3imw-clan-runtime.drv
  /nix/store/8ajw613l6sdgbkwxkhpy05ppm3d1ba6y-closure-info.drv
  /nix/store/wz8mgn7kpmdwnhfh2j8vlq069iscmcyj-clan-cli-source.drv
  /nix/store/irdkynw5y0dvqp70dix6871ysx5gh3vh-clan-cli.drv
  /nix/store/cfga8w2rgf5aq6p3zfna9vy6a8wsfzg0-check-vars.drv
error: path '/nix/store/v9gv9cy1smssf5rzp5dva72cyka97ki6-check-vars' is not valid
error: Cannot build '/nix/store/cfga8w2rgf5aq6p3zfna9vy6a8wsfzg0-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/v9gv9cy1smssf5rzp5dva72cyka97ki6-check-vars