these 5 derivations will be built:
  /nix/store/20mfa41pqs7bza8rccdh037l4mw4vnrs-clan-runtime.drv
  /nix/store/2k2nf5c6w7qmjj4lhc75iff0r6xb5jny-closure-info.drv
  /nix/store/h6vsdlazqj35v0g1dwx8r0ib3sp7jahi-clan-cli-source.drv
  /nix/store/fi7dl6q1iam2fsr4l4nvlhhjqwnf8g0s-clan-cli.drv
  /nix/store/i7klffjs652y5ra79j2sa2w68jcf5ab6-check-vars.drv
error: path '/nix/store/pv55j0jam1gb7c36qp1sf68jwc4xwmsi-check-vars' is not valid
error: Cannot build '/nix/store/i7klffjs652y5ra79j2sa2w68jcf5ab6-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/pv55j0jam1gb7c36qp1sf68jwc4xwmsi-check-vars