these 3 derivations will be built:
  /nix/store/9867xayhsij9c1g0nkgnis4xbka4bh4a-home-manager-path.drv
  /nix/store/ka0gqh1lci9bq7d5kkgi6b85lxsmr8wp-activation-script.drv
  /nix/store/kqamg83zv8gvndf6rzsl4jdj5sq0yfb9-home-manager-generation.drv