these 5 derivations will be built:
  /nix/store/jsllvakizp2c8kyhld5gbsbw65bn7j1v-clan-runtime.drv
  /nix/store/3isqiis5pkrirjvxa7qv04b3046l78ms-clan-cli-source.drv
  /nix/store/qva7wi2zyfcwxf1d3abxc2zwz4vfpcm7-clan-cli.drv
  /nix/store/v1wjzvymshv3y1zl6jx4qbn0xc0lk0g1-closure-info.drv
  /nix/store/fp9n09qfp6gny96jbrqgc30hmwiq84zy-check-vars.drv
error: path '/nix/store/wq44z2vb83l7b7zmp5n2pcpncy77jjn7-check-vars' is not valid
error: Cannot build '/nix/store/fp9n09qfp6gny96jbrqgc30hmwiq84zy-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/wq44z2vb83l7b7zmp5n2pcpncy77jjn7-check-vars