these 2 derivations will be built:
  /nix/store/y4sb9lqqgjc7f9wh1jhcz503bwwyd8hp-home-manager-files.drv
  /nix/store/7vc3hy9hhm5zw5gqs8l6g6l8v8r5yjhz-home-manager-generation.drv