added icons and .desktop file

flake.nix

@@ -13,32 +13,54 @@
   }: let
     system = "x86_64-linux";
     pkgs = nixpkgs.legacyPackages.${system};
+
+    name = "scannedImageExtractor";
   in {
-    packages.${system} = let
+    packages.${system} = {
-      name = "scannedImageExtractor";
+      default = let
-    in {
+        desktopItem = pkgs.makeDesktopItem {
-      default = pkgs.gccStdenv.mkDerivation {
+          inherit name;
-        inherit name;
-        src = ./.;
 
-        nativeBuildInputs = with pkgs; [
+          exec = name;
-          cmake
+          desktopName = "Scanned Image Extractor";
-          opencv2
+          terminal = false;
-          liblbfgs
+          icon = name;
-          qt5.full
+          mimeTypes = ["x-content/image-dcf"];
-          libsForQt5.qt5.wrapQtAppsHook
+          categories = ["Graphics" "Photography" "GNOME" "KDE"];
-        ];
+        };
+      in
+        pkgs.gccStdenv.mkDerivation {
+          inherit name;
+          src = ./.;
 
-        dontUseCmakeConfigure = true;
+          nativeBuildInputs = with pkgs; [
-        buildPhase = ''
+            cmake
-          cmake scannerExtract -DCMAKE_BUILD_TYPE=release -DOPENCV2=1
+            opencv2
-          make
+            liblbfgs
-        '';
+            qt5.full
+            libsForQt5.qt5.wrapQtAppsHook
+          ];
 
-        installPhase = ''
+          configurePhase = ''
-          install -m 555 ${name} -Dt $out/bin
+            cmake scannerExtract -DCMAKE_BUILD_TYPE=release -DOPENCV2=1
-        '';
+          '';
-      };
+
+          buildPhase = ''
+            make
+          '';
+
+          installPhase = ''
+            install -m 555 ${name} -Dt $out/bin
+
+            # Install .desktop file
+            install -m 444 ${desktopItem}/share/applications/${name}.desktop -Dt $out/share/applications
+
+            # Install icons
+            for dimension in 128 256; do
+              install -m 444 $src/scannerExtract/ico/${name}''${dimension}x''${dimension}.png -D $out/share/icons/''${dimension}x''${dimension}/apps/${name}.png
+            done
+          '';
+        };
 
       appImage = let
         src = nix-appimage.bundlers.${system}.default self.packages.${system}.default;
@@ -55,6 +77,15 @@
         };
     };
 
+    apps.${system} = {
+      appImage = {
+        program = "${pkgs.writeShellScript "scannedImageExtractor" ''
+          ${pkgs.appimage-run}/bin/appimage-run ${self.packages.${system}.appImage}/${name}.AppImage
+        ''}";
+        type = "app";
+      };
+    };
+
     devShells = {
       default = pkgs.mkShellNoCC {
         packages = with pkgs; [