these 4 derivations will be built:
  /nix/store/a80vbc2lnm4sw1gymi7i4ccd7yrs09qh-clan-cli-source.drv
  /nix/store/855420zwzhdskdh321gsg3wzv43srjzk-clan-cli.drv
  /nix/store/ry2j3bacn7p9glgg07dlklw4qjmmriqr-closure-info.drv
  /nix/store/0kzj8l1mddk9j5c8ajqjl3v32m7jp7a8-check-vars.drv
error: path '/nix/store/7r5v8rmmnp7arkvgkl6z78vl4i7j5kqx-check-vars' is not valid
error: Cannot build '/nix/store/0kzj8l1mddk9j5c8ajqjl3v32m7jp7a8-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/7r5v8rmmnp7arkvgkl6z78vl4i7j5kqx-check-vars