Fix NixOS GUI issues

Fixes #380, #414

flake.nix

@@ -18,18 +18,30 @@
         "i686-windows"
         "x86_64-windows"
       ];
-
     in flake-utils.lib.eachSystem systems (system:
       let
-
         pkgs = nixpkgs.legacyPackages.${system};
-
+        lib = pkgs.lib;
         naersk-lib = naersk.lib.${system};
+        isLinux = pkgs.stdenv.hostPlatform.isLinux;
 
-        alfis = { webgui ? true, doh ? true, edge ? false }:
+        guiBuildInputs = lib.optionals isLinux (with pkgs; [
+          gtk3
+          webkitgtk_4_1
+          xdotool
+          libayatana-appindicator
+        ]);
+
+        guiNativeBuildInputs = [ pkgs.pkg-config ]
+          ++ lib.optionals isLinux [ pkgs.makeWrapper pkgs.wrapGAppsHook ];
+
+        guiRuntimeTools = lib.optionals isLinux [ pkgs.kdePackages.kdialog ];
+        guiRuntimeLibPath = lib.optionalString isLinux (lib.makeLibraryPath guiBuildInputs);
+
+        alfis = { webgui ? true, doh ? true }:
           let
             features = builtins.concatStringsSep " " (builtins.concatMap
-              ({ option, features }: pkgs.lib.optionals option features) [
+              ({ option, features }: lib.optionals option features) [
                 {
                   option = webgui;
                   features = [ "webgui" ];
@@ -38,55 +50,40 @@
                   option = doh;
                   features = [ "doh" ];
                 }
-                {
-                  option = edge;
-                  features = [ "edge" ];
-                }
               ]);
           in naersk-lib.buildPackage {
             pname = "alfis";
-            nativeBuildInputs = with pkgs; [ pkg-config webkitgtk kdialog ];
-            dontWrapQtApps = true;
+            root = ./.;
+            nativeBuildInputs = guiNativeBuildInputs;
+            buildInputs = guiBuildInputs;
             cargoBuildOptions = opts:
               opts ++ [ "--no-default-features" ]
-              ++ [ "--features" ''"${features}"'' ];
-            root = ./.;
+              ++ lib.optionals (features != "") [ "--features" features ];
+            preFixup = lib.optionalString isLinux ''
+              gappsWrapperArgs+=(--prefix PATH : "${lib.makeBinPath guiRuntimeTools}")
+              gappsWrapperArgs+=(--prefix LD_LIBRARY_PATH : "${guiRuntimeLibPath}")
+            '';
           };
-
-        isWindows = builtins.elem system [ "i686-windows" "x86_64-windows" ];
       in rec {
-
         packages = {
           alfis = alfis {
             webgui = true;
             doh = true;
-            edge = false;
           };
           alfisWithoutGUI = alfis {
             webgui = false;
             doh = true;
-            edge = false;
-          };
-        } // pkgs.lib.optionalAttrs isWindows {
-          alfisEdge = alfis {
-            webgui = false;
-            doh = true;
-            edge = true;
           };
         };
 
         defaultPackage = packages.alfis;
 
-        apps = with flake-utils.lib;
-          {
-            alfis = mkApp { drv = packages.alfis; };
-            alfisWithoutGUI = mkApp { drv = packages.alfisWithoutGUI; };
-          } // pkgs.lib.optionalAttrs isWindows {
-            alfisEdge = mkApp { drv = packages.alfisEdge; };
-          };
+        apps = with flake-utils.lib; {
+          alfis = mkApp { drv = packages.alfis; };
+          alfisWithoutGUI = mkApp { drv = packages.alfisWithoutGUI; };
+        };
+
         defaultApp = apps.alfis;
-
         devShell = import ./shell.nix { inherit pkgs; };
-
       });
 }