nix: flake cleanup

- Removed all outputs except for "packages"
- Track nixos-unstable instead of stable
- Cleanup installPhase

flake.nix

@@ -1,43 +1,34 @@
-# Based on fortuneteller2k's (https://github.com/fortuneteller2k/nixpkgs-f2k) package repo
 {
-  description =
-    "Hyprland is a dynamic tiling Wayland compositor that doesn't sacrifice on its looks.";
+  description = "Hyprland is a dynamic tiling Wayland compositor that doesn't sacrifice on its looks";
+
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs/nixos-21.11";
-    utils.url = "github:numtide/flake-utils";
-    nixpkgs-wayland.url = "github:nix-community/nixpkgs-wayland";
-    wlroots-git = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    wlroots = {
       url = "gitlab:wlroots/wlroots?host=gitlab.freedesktop.org";
       flake = false;
     };
   };
 
-  outputs = { self, nixpkgs, utils, nixpkgs-wayland, wlroots-git }:
-    {
-      overlay = final: prev: {
-        hyprland = prev.callPackage self {
-          src = self;
-          wlroots = (nixpkgs-wayland.overlays.default final prev).wlroots.overrideAttrs (prev: rec {
-            src = wlroots-git;
-          });
-        };
-      };
-      overlays.default = self.overlay;
-    } // utils.lib.eachSystem [ "aarch64-linux" "x86_64-linux" ] (system:
-      let pkgs = nixpkgs.legacyPackages.${system};
-      in rec {
-        packages = {
-          hyprland = pkgs.callPackage self {
-            src = self;
-            wlroots = nixpkgs-wayland.packages.${system}.wlroots.overrideAttrs (prev: rec {
-            src = wlroots-git;
-          });
-          };
-        };
-        defaultPackage = packages.hyprland;
-        apps.hyprland = utils.lib.mkApp { drv = packages.hyprland; };
-        defaultApp = apps.hyprland;
-        apps.default =
-          utils.lib.mkApp { drv = self.packages.${system}.hyprland; };
+  outputs = inputs @ {
+    self,
+    nixpkgs,
+    ...
+  }: let
+    supportedSystems = [
+      "aarch64-linux"
+      "x86_64-linux"
+    ];
+    genSystems = nixpkgs.lib.genAttrs supportedSystems;
+    pkgsFor = nixpkgs.legacyPackages;
+  in {
+    packages = genSystems (system: {
+      wlroots = pkgsFor.${system}.wlroots.overrideAttrs (prev: {
+        src = inputs.wlroots;
       });
+      default = pkgsFor.${system}.callPackage ./default.nix {
+        version = self.lastModifiedDate;
+        inherit (self.packages.${system}) wlroots;
+      };
+    });
+  };
 }