update flake and setup scheme

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "A colorful wallpaper generator";
 
-  nixConfig.bash-prompt = "\[\\e[1m\\e[34mhuepaper-develop\\e[0m\]$ ";
+  nixConfig.bash-prompt = "\[\\e[1m\\e[34mhuepaper-dev\\e[0m:\\w\]$ ";
 
   inputs.flake-utils.url = "github:numtide/flake-utils";
 
@@ -15,31 +15,26 @@
         {
 
           # Package
-
           packages.huepaper =
-
             pkgs.python3Packages.buildPythonPackage rec {
-
               name = "huepaper";
               src = self;
-
-              nativeBuildInputs = with pkgs; [
-                wrapGAppsHook
-              ];
-
               propagatedBuildInputs = with pkgs; [
                 python3Packages.colour
                 python3Packages.pillow
               ];
-
             };
-
           defaultPackage = self.packages.${system}.huepaper;
 
+          # App
+          apps.huepaper = {
+            type = "app";
+            program = "${self.packages.${system}.huepaper}/bin/huepaper";
+          };
+          defaultApp = self.apps.${system}.huepaper;
+
           # Development shell
-
           devShell = pkgs.mkShell {
-
             buildInputs = with pkgs; [
               python3
               python3Packages.colour

huepaper.py

@@ -10,7 +10,6 @@ from huepaper import (
     save_image,
 )
 import argparse
-import os.path
 
 
 def print_greeter():

setup.py

@@ -1,4 +1,10 @@
 from setuptools import setup
+import os
+import shutil
+
+if not os.path.exists("bin"):
+    os.makedirs("bin")
+shutil.copyfile("huepaper.py", "bin/huepaper")
 
 setup(
     name="huepaper",