these 3 derivations will be built:
  /nix/store/dkpbrlpax4yg6fzhf5x36a33wbc03ifh-clan-cli-source.drv
  /nix/store/wk7xy3lkdkdhdxf211yi778y4658rfmi-clan-cli.drv
  /nix/store/47hm7d66zf4dal5yvzkqzwc373pm62av-nix-shell.drv