these 3 derivations will be built:
  /nix/store/07xa122vm6hhdpdwsppll304mqhabmn3-herdr-plugins.json.drv
  /nix/store/gxzwidlkr9hyp8ys1pgdx9scivslfaq9-activation-script.drv
  /nix/store/lz8djips78v3n5ws6g10xs40w4pvr72b-home-manager-generation.drv