these 4 derivations will be built:
  /nix/store/rn8r9dbwd2yxwa8l9jnvgywvrfc2wmp9-clan-cli-source.drv
  /nix/store/7xwsxzcx40191433d7vka7szwcsk69k5-clan-cli.drv
  /nix/store/p8rryiwi4lzjfbc676wzvcn4rkf3d0bn-closure-info.drv
  /nix/store/v98d5zwzsz5i8mi7rfmk6fbjz3nc1ykj-check-vars.drv
error: path '/nix/store/3l85w7ipsbd2gid8qc7060adf8xr87dg-check-vars' is not valid
error: Cannot build '/nix/store/v98d5zwzsz5i8mi7rfmk6fbjz3nc1ykj-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/3l85w7ipsbd2gid8qc7060adf8xr87dg-check-vars