Adding files

flake.nix

@@ -0,0 +1,54 @@
+{
+	description = "Legacy Minecraft Launcher";
+	
+	inputs = {
+		nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+		flake-utils.url = "github:numtide/flake-utils";
+	};
+	
+	outputs = { self, nixpkgs, flake-utils }: flake-utils.lib.eachDefaultSystem (system:
+		let
+			pkgs = import nixpkgs { inherit system; };
+		in
+		{
+			packages.default = pkgs.stdenvNoCC.mkDerivation {
+				pname = "legacy-launcher";
+				version = "latest";
+				
+				src = pkgs.fetchurl {
+					url = "https://ely.by/load/launcher/jar";
+					sha256 = "sha256-n4J+/I8hsU4EA6eqyUUIScJhvLpkUdmr7u5jiLhQhX4=";
+				};
+				
+				nativeBuildInputs = [ pkgs.makeWrapper ];
+				
+				dontUnpack = true;
+				
+				installPhase = ''
+				mkdir -p $out/bin
+				mkdir -p $out/share/{applications,legacy-launcher}
+				
+				# Install JAR
+				install -Dm644 $src \
+				  $out/share/legacy-launcher/LegacyLauncher_legacy.jar
+				
+				# Create launcher wrapper
+				makeWrapper ${pkgs.jre}/bin/java \
+				  $out/bin/legacy-launcher \
+				  --add-flags "-jar $out/share/legacy-launcher/LegacyLauncher_legacy.jar"
+				
+				# Desktop entry
+				install -Dm644 ${./legacy-launcher.desktop} \
+				  $out/share/applications/legacy-launcher.desktop
+				'';
+				
+				meta = with pkgs.lib; {
+					description = "Stable, fast and simple Minecraft Launcher";
+					homepage = "https://llaun.ch";
+					license = licenses.unfree;
+					platforms = platforms.all;
+				};
+			};
+		 }
+	);
+}