these 3 derivations will be built:
  /nix/store/pykqfndccwvmdsfyyb0ndl901n1y0v1l-source.drv
  /nix/store/l5iplbi2g57f928gq3fq4dylgz8x40hp-harmonia-deps-3.2.0.drv
  /nix/store/gkc4ljap35igzhzfvdhkv6w4v304gl4j-harmonia-clippy-3.2.0.drv