these 3 derivations will be built:
  /nix/store/qarb5j554v1646ha9zkwhkjk6485d6g8-source.drv
  /nix/store/mifkpy78n98jrnlfkrml0fdfy4999scc-harmonia-deps-3.2.0.drv
  /nix/store/5vn7sqi5d09y8b352mhnq1c3vvdmqi7m-harmonia-3.2.0.drv