these 5 derivations will be built:
  /nix/store/99z0nxq12l46ycq328xbr8bcw3nk3ad8-closure-info.drv
  /nix/store/yywixphdrj589hh8ynlrcb5shigckipi-clan-runtime.drv
  /nix/store/glj71cywjlynhfihv5fb9b1fh0bmk4pj-clan-cli-source.drv
  /nix/store/vqbg2vrzxswvcjg7k9i0nnzsb034q7qq-clan-cli.drv
  /nix/store/3471dr86arsxigivkyqbgf0fpmjq61yx-check-vars.drv
error: path '/nix/store/ab3fmkmm8p4mk2y2zngvwzgyd8pilkw4-check-vars' is not valid
error: Cannot build '/nix/store/3471dr86arsxigivkyqbgf0fpmjq61yx-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/ab3fmkmm8p4mk2y2zngvwzgyd8pilkw4-check-vars