docs: clean up module installation chapters

Author: NotAShelf

docs/manual/installation/modules/home-manager.md

@@ -44,12 +44,15 @@ Followed by importing the home-manager module somewhere in your configuration.
   };
 
   outputs = { nixpkgs, home-manager, nvf, ... }: let
-  system = "x86_64-linux"; in {
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+  in {
     # ↓ this is your home output in the flake schema, expected by home-manager
-    "your-username@your-hostname" = home-manager.lib.homeManagerConfiguration
+    "your-username@your-hostname" = home-manager.lib.homeManagerConfiguration {
+      inherit pkgs;
       modules = [
         nvf.homeManagerModules.default # <- this imports the home-manager module that provides the options
-        ./home.nix # <- your home entrypoint
+        ./home.nix # <- your home entrypoint, `programs.nvf.*` may be defined here
       ];
     };
   };

docs/manual/installation/modules/nixos.md

@@ -42,13 +42,12 @@ Followed by importing the NixOS module somewhere in your configuration.
     nvf.url = "github:notashelf/nvf";
   };
 
-  outputs = { nixpkgs, nvf, ... }: let
-  system = "x86_64-linux"; in {
+  outputs = { nixpkgs, nvf, ... }: {
     # ↓ this is your host output in the flake schema
-    nixosConfigurations."yourUsername»" = nixpkgs.lib.nixosSystem {
+    nixosConfigurations."your-hostname" = nixpkgs.lib.nixosSystem {
       modules = [
         nvf.nixosModules.default # <- this imports the NixOS module that provides the options
-        ./configuration.nix # <- your host entrypoint
+        ./configuration.nix # <- your host entrypoint, `programs.nvf.*` may be defined here
       ];
     };
   };