these 4 derivations will be built:
  /nix/store/87zyva6q4qxsnpiswra18ln7p88sjk9f-clan-cli-source.drv
  /nix/store/95nk5xbklbhhn03bqzxkrjw7lx70l7zk-closure-info.drv
  /nix/store/gf5fcdb9ifnpycn7yiqc0vdl73i9b3a6-clan-cli.drv
  /nix/store/ykj1wx1nnyqqzlhml5pqr90ilam31cg8-check-vars.drv
error: path '/nix/store/z9hf543axsgm52900jvf98z7vamjmng6-check-vars' is not valid
error: Cannot build '/nix/store/ykj1wx1nnyqqzlhml5pqr90ilam31cg8-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/z9hf543axsgm52900jvf98z7vamjmng6-check-vars