these 4 derivations will be built:
  /nix/store/jzlbq5jw3hd4rlhgwp9rbvr6dfsqnbcg-clan-cli-source.drv
  /nix/store/m8c889lnds8r5vx4s9iafw1j4hkhf24d-closure-info.drv
  /nix/store/q7qqd5f8vwxya762irc7fybb711l9gkw-clan-cli.drv
  /nix/store/zxgkkssqa5yl9rh0487v2acysp1bybrz-check-vars.drv
error: path '/nix/store/larb9m0n084yy4vaz96m2cmydsamfb2x-check-vars' is not valid
error: Cannot build '/nix/store/zxgkkssqa5yl9rh0487v2acysp1bybrz-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/larb9m0n084yy4vaz96m2cmydsamfb2x-check-vars