these 3 derivations will be built:
  /nix/store/kb45fq80mzw8ahcmz442mxnn5qij0kkp-clan-cli-source.drv
  /nix/store/kz0xzp77h1ivcng44njl8jrwmnrp4g78-clan-cli.drv
  /nix/store/gvk6ikwfjmac1fdk8ki7sq2hsb9hk6va-nix-shell.drv