these 4 derivations will be built:
  /nix/store/94jgdzy6i0i37njb6rczclh0lhxjqr3r-closure-info.drv
  /nix/store/rslzlkg7mr4lyrvk675b50cjg5y9wzi3-clan-cli-source.drv
  /nix/store/h2lmgqixnkzm743h28cyhycv8r2n9q7z-clan-cli.drv
  /nix/store/6riszaink9l6wcf5ar16jij5xzm9yf9p-check-vars.drv
error: path '/nix/store/51n120rbkgs4kp19n3kbsn45pkhlfhl9-check-vars' is not valid
error: Cannot build '/nix/store/6riszaink9l6wcf5ar16jij5xzm9yf9p-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/51n120rbkgs4kp19n3kbsn45pkhlfhl9-check-vars