these 4 derivations will be built:
  /nix/store/19zkx5zsxrcnjsdycmh2lfnhn6shi1ad-closure-info.drv
  /nix/store/gc18cnbpymjhmfgv903siqfr5jakbsws-clan-cli-source.drv
  /nix/store/mm8hyr7dpai8vdxzzsy6n8p0bqrax49z-clan-cli.drv
  /nix/store/fk3dnfmcs5q7afz0q4wmpnskv3nrdjhg-check-vars.drv
error: path '/nix/store/b2j50wr5i7bg52jqf5wz348s3snsp9lw-check-vars' is not valid
error: Cannot build '/nix/store/fk3dnfmcs5q7afz0q4wmpnskv3nrdjhg-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/b2j50wr5i7bg52jqf5wz348s3snsp9lw-check-vars