these 3 derivations will be built:
  /nix/store/bsm78hix5p20xljvvv1rpnlpx3b4w2mr-source.drv
  /nix/store/xdpd2x4cdlw5ddx5bqi0d3khd1z4fnvg-harmonia-deps-3.2.0.drv
  /nix/store/y221f1mm5d2zsxail687dlmnzwhvflpi-harmonia-3.2.0.drv