these 4 derivations will be built:
  /nix/store/ri3462x10cqaf7vfxxaj2ykgji7381jv-clan-cli-source.drv
  /nix/store/27pkb3cn3i41w7yvgjzqlvlwc7g0afkx-clan-cli.drv
  /nix/store/v8p3g63mirqz9xmiqjznr5146nx7rl8w-closure-info.drv
  /nix/store/8s7xp617ms6f55p44qhcp7q6h8pq6lfs-check-vars.drv
error: path '/nix/store/rvj5l71600b1ffbgm932z3w9n6qawgir-check-vars' is not valid
error: Cannot build '/nix/store/8s7xp617ms6f55p44qhcp7q6h8pq6lfs-check-vars.drv'.
       Reason: builder failed with exit code 1.
       Output paths:
         /nix/store/rvj5l71600b1ffbgm932z3w9n6qawgir-check-vars