these 4 derivations will be built:
  /nix/store/l03mymfchi9s3y9wvpskm06gh7sbc6cd-closure-info.drv
  /nix/store/7z15d1frarl2s22i0gvlhdapxr8xhqgr-clan-cli-source.drv
  /nix/store/nd6zjfrl0ngaim3k9yzhq7gq5z4n5c8q-clan-cli.drv
  /nix/store/2hyn3zld4v8l7qq4d0hqrvb0drk5w58n-check-vars.drv
error: path '/nix/store/5z8yqbbi79wqy4yzm0mq1wlxl92q3fzg-check-vars' is not valid
error: Cannot build '/nix/store/2hyn3zld4v8l7qq4d0hqrvb0drk5w58n-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/5z8yqbbi79wqy4yzm0mq1wlxl92q3fzg-check-vars