Update readme with new nix instructions

Also simplify hyprload example

README.md

@@ -41,7 +41,62 @@ You can use `hy3:makegroup` to create a new split.
 ## Installing
 
 ### Nix
-Under nix, use the provided devShell, then go to [Manual Installation](#manual)
+#### Using the home-manager module
+Assuming you use hyprland's home manager module, you can easily integrate hy3, as hy3 provides a home manager module that exposes the `wayland.windowManager.hyprland.plugins.hy3.enable` option.
+
+```nix
+# flake.nix
+
+{
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+
+    home-manager = {
+      url = "github:nix-community/home-manager";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+
+    hyprland.url = "github:hyprwm/Hyprland";
+
+    hy3 = {
+      url = "github:outfoxxed/hy3";
+      inputs.hyprland.follows = "hyprland";
+    };
+  };
+
+  outputs = { nixpkgs, home-manager, hyprland, hy3, ... }: {
+    homeConfigurations."user@hostname" = home-manager.lib.homeManagerConfiguration {
+      pkgs = nixpkgs.legacyPackages.x86_64-linux;
+
+      modules = [
+        hyprland.homeManagerModules.default
+        hy3.homeManagerModules.default
+
+        {
+          wayland.windowManager.hyprland = {
+            enable = true;
+            plugins.hy3.enable = true;
+          };
+        }
+      ];
+    };
+  };
+}
+```
+
+#### Manually (Nix)
+hy3's binary is availible as `${hy3.packages.<system>.hy3}/lib/libhy3.so`, so you can also
+directly use it in your hyprland config like so:
+
+```nix
+# ...
+wayland.windowManager.hyprland = {
+  # ...
+  extraConfig = ''
+    exec-once = hyprctl plugin load ${hy3.packages.x86_64-linux.hy3}/lib/libhy3.so
+  '';
+};
+```
 
 ### [Hyprload](https://github.com/Duckonaut/hyprload)
 Add an entry to your hyprload.toml like so:
@@ -49,19 +104,18 @@ Add an entry to your hyprload.toml like so:
 ```toml
 plugins = [
   # ...
-  { git = "https://github.com/outfoxxed/hy3", branch = "master", name = "hy3" },
+  "outfoxxed/hy3",
   # ...
 ]
 ```
 
 ### Manual
-First export `HYPRLAND_HEADERS`, then run the following commands:
+Install hyprland, then run the following commands:
 
 ```sh
 cmake -DCMAKE_BUILD_TYPE=Debug -B build
 cmake --build build
 ```
 
-> **Note**: Please use a debug build as debugging a backtrace from a release build is much more difficult if you need to report an error.
+The plugin will be located at `build/libhy3.so`, and you can load it normally
-
+(See [the hyprland wiki](https://wiki.hyprland.org/Plugins/Using-Plugins/#installing--using-plugins) for details.)
-The plugin will be located at `build/libhy3.so`.