these 4 derivations will be built:
  /nix/store/66ny5n2dfvs13jkz7ya5zq474zvglkcn-clan-cli-source.drv
  /nix/store/d87kfh9jf21kvngbabhr275y1hrlwir3-clan-cli.drv
  /nix/store/gx6czfiq83hgyx5mkj36f4h4m180zh2n-closure-info.drv
  /nix/store/g7qhjxysd27ibg79pwq4il2zqipnazyz-check-vars.drv
error: path '/nix/store/hzxnijrk4rfizbb20jdbz20skz1v3bw3-check-vars' is not valid
error: Cannot build '/nix/store/g7qhjxysd27ibg79pwq4il2zqipnazyz-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/hzxnijrk4rfizbb20jdbz20skz1v3bw3-check-vars