these 4 derivations will be built:
  /nix/store/v94v8f1s2difdpwgrsz93xz8bl8ids71-clan-cli-source.drv
  /nix/store/nwzb120270v58iabmlp42ja451lj6fnv-clan-cli.drv
  /nix/store/xx3bq91wj8zjadyjkha2hbnxjj8n1rdg-closure-info.drv
  /nix/store/2v0krbd7jci46v1dscz3psd28bk1rfbv-check-vars.drv
error: path '/nix/store/27dqwdf0c7gg6d4icy1chlgh67r06rdl-check-vars' is not valid
error: Cannot build '/nix/store/2v0krbd7jci46v1dscz3psd28bk1rfbv-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/27dqwdf0c7gg6d4icy1chlgh67r06rdl-check-vars