these 3 derivations will be built:
  /nix/store/398ixq1567y5f8aagr0v135j0qx3jpsi-home-manager-files.drv
  /nix/store/ra7zidhf7vw5abrs3msm743sg0fnzwrv-activation-script.drv
  /nix/store/0qrv7mwga6j5nzp9v8rn5z82x8layryd-home-manager-generation.drv