add flake.nix and other required files for nix build

flake.nix

@@ -0,0 +1,30 @@
+# 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.";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    utils.url = "github:numtide/flake-utils";
+    nixpkgs-wayland.url = "github:nix-community/nixpkgs-wayland";
+  };
+
+  outputs = { self, nixpkgs, utils, nixpkgs-wayland }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+        version = "git";
+      in rec {
+        packages = {
+          hyprland = pkgs.callPackage ./nix-build {
+            inherit version;
+            src = self;
+            inherit (nixpkgs-wayland.packages.${system}) wlroots;
+          };
+        };
+        defaultPackage = packages.hyprland;
+        apps.hyprland = utils.lib.mkApp { drv = packages.hyprland; };
+        defaultApp = apps.hyprland;
+        apps.default =
+          utils.lib.mkApp { drv = self.packages."${system}".default; };
+      });
+}