these 3 derivations will be built:
  /nix/store/5s4l3n8n65gvprwsf3jhj3pp8dnzz1bk-source.drv
  /nix/store/azn877h0kgyh8sbqvgrmplia2gs6dg2m-plater.desktop.drv
  /nix/store/3a44l8cbk78f532ms0yy7dlqcqknpq77-plater-2020-07-30.drv