these 3 derivations will be built:
  /nix/store/8padj42bh4m76bb0qx5pjalf7nabfz01-source.drv
  /nix/store/r73918isih3awhn42w5xqm8qipjyrx8y-iets-deps-0.1.0.drv
  /nix/store/4h546qhf0mmp0fljpkzm6wjmmk5jw0f9-iets-clippy-0.1.0.drv