these 3 derivations will be built:
  /nix/store/v94v8f1s2difdpwgrsz93xz8bl8ids71-clan-cli-source.drv
  /nix/store/nwzb120270v58iabmlp42ja451lj6fnv-clan-cli.drv
  /nix/store/b60ffyh9g9vkckflhp4mr02i573yjs29-nix-shell.drv