these 3 derivations will be built:
  /nix/store/asdk6s1hgcaxk2xwbk8pr5kcl4lr9i62-source.drv
  /nix/store/g2mn009g40mlprbl8pprsaq4w49kbzr5-harmonia-deps-3.2.0.drv
  /nix/store/p5biw1p0l0mx4h4kw4kag945cqg7cb83-harmonia-3.2.0.drv