these 3 derivations will be built:
  /nix/store/a5pq5n2bzkv92qap1s0a5kcmbd66g8q5-source.drv
  /nix/store/0p1vygx1lqbm161frcgajq4q3flhvv9y-harmonia-deps-3.2.0.drv
  /nix/store/jb8mppw8bllka6glh48y4da9g7w1f65m-harmonia-3.2.0.drv