these 3 derivations will be built:
  /nix/store/78sxmlimv5cg8xqgwi686kfmm926ccnf-source.drv
  /nix/store/nqppvjfbjcx3cdwix1nghlzsf36jk99n-harmonia-deps-3.2.0.drv
  /nix/store/chzll3pqkvcq96zp7lanx58fpc6jnzpc-harmonia-3.2.0.drv