these 4 derivations will be built:
  /nix/store/87gl98lgbrwp3xxmpqzbz86vmq8av7a6-closure-info.drv
  /nix/store/s3x971z4niw80rh47cc2kbw8p3i3hnhf-clan-cli-source.drv
  /nix/store/hynyzi9xqpb3gzkx0d1zg3r5i6ysbnzg-clan-cli.drv
  /nix/store/arl9ih1h2w4hdyzc2m9ydlwg33x5k42n-check-vars.drv
error: path '/nix/store/jawm6z91l2h67cjyafjd2b917qascc2b-check-vars' is not valid
error: Cannot build '/nix/store/arl9ih1h2w4hdyzc2m9ydlwg33x5k42n-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/jawm6z91l2h67cjyafjd2b917qascc2b-check-vars