these 3 derivations will be built:
  /nix/store/w81lczg2qmlws481xaw80qhjxaw7bxay-source.drv
  /nix/store/pdrfl25c7wq2ywijfd7s22fwgyd6z84w-harmonia-deps-3.2.0.drv
  /nix/store/8n2avmi24dd853ginqgrmamx643qzpnv-harmonia-3.2.0.drv