Home Manager Not Installed

[jeff-pow]

Hello! I'm a recent NixOS explorer attempting to convert a very basic configuration into the minimal flake, but I'm unable to run home manager after rebuilding. Rebuilding from the flake is going just fine, but when I attempt to use the home manager syncing command, it tells me that home manager is not installed. I'll post what I've done that I believe may be pertinent.

path:/home/jeff/nix-flake?lastModified=1669694425&narHash=sha256-Ig67V1wT9ko76L5AU76HDqEmT9wFlFwqv71bCDb4Uc4=
├───homeConfigurations: unknown
└───nixosConfigurations
    └───leggero: NixOS configuration

{
  description = "Your new nix config";

  inputs = {
    # Nixpkgs
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";

    # Home manager
    home-manager.url = "github:nix-community/home-manager";
    home-manager.inputs.nixpkgs.follows = "nixpkgs";

    # TODO: Add any other flake you might need
    hardware.url = "github:nixos/nixos-hardware";

    # Shameless plug: looking for a way to nixify your themes and make
    # everything match nicely? Try nix-colors!
    # nix-colors.url = "github:misterio77/nix-colors";
  };

  outputs = { nixpkgs, home-manager, ... }@inputs: {
    nixosConfigurations = {
      # FIXME replace with your hostname
      leggero = nixpkgs.lib.nixosSystem {
        specialArgs = { inherit inputs; }; # Pass flake inputs to our config
        # > Our main nixos configuration file <
        modules = [ ./nixos/configuration.nix ];
      };
    };

    homeConfigurations = {
      # FIXME replace with your username@hostname
      "jeff@leggero" = home-manager.lib.homeManagerConfiguration {
        pkgs = nixpkgs.legacyPackages.x86_64-linux; # Home-manager requires 'pkgs' instance
        extraSpecialArgs = { inherit inputs; }; # Pass flake inputs to our config
        # > Our main home-manager configuration file <
        modules = [ ./home-manager/home.nix ];
      };
    };
  };
}

And in home.nix

home = {
  username = "jeff";
  homeDirectory = "/home/jeff";
};

I'm likely doing something very basic that I just haven't figured out how to fix yet, but I'd love some help!

[jeff-pow]

I didn't end up using the correct command. nix build .#homeConfigurations.<username>.activationPackage ended up working

[Misterio77]

Hey! Glad it worked for you. home-manager switch --flake .#username should work, however (just nix shell nixpkgs#home-manager if you don't have it available just yet).