these 3 derivations will be built:
  /nix/store/70m25pclqvm97i16xvaxf9ra1zzhjvq6-source.drv
  /nix/store/b3030y7zm87726dfa3zff3lqqrr8yzd2-harmonia-deps-3.2.0.drv
  /nix/store/bfz0s84cjvnhs92136cdy3i2z6d916l4-harmonia-3.2.0.drv