solarus-launcher: un-vendor qlementine within nixpkgs; refactor

pkgs/by-name/so/solarus-launcher/package.nix

@@ -2,7 +2,6 @@
   lib,
   stdenv,
   fetchFromGitLab,
-  fetchFromGitHub,
   replaceVars,
   cmake,
   ninja,
@@ -16,38 +15,12 @@
   libvorbis,
   solarus,
   glm,
-  qt6Packages,
-  kdePackages,
+  qt6,
+  qlementine,
+  qlementine-icons,
+  qtappinstancemanager,
 }:
 
-let
-  qlementine-icons-src = fetchFromGitHub {
-    owner = "oclero";
-    repo = "qlementine-icons";
-    tag = "v1.8.0";
-    hash = "sha256-FPndzMEOQvYNYUbT2V6iDlwoYqOww38GW/T3zUID3g0=";
-  };
-
-  qlementine-src = fetchFromGitHub {
-    owner = "oclero";
-    repo = "qlementine";
-    tag = "v1.2.1";
-    hash = "sha256-CPQMmTXyUW+CyLjHYx+IdXY4I2mVPudOmAksjd+izPA=";
-  };
-
-  qtappinstancemanager-src = fetchFromGitHub {
-    owner = "oclero";
-    repo = "qtappinstancemanager";
-    tag = "v1.3.0";
-    hash = "sha256-/zvNR/RHNV19ZI8d+58sotWxY16q2a7wWIBuKO52H5M=";
-  };
-
-  inherit (qt6Packages)
-    qtbase
-    qttools
-    wrapQtAppsHook
-    ;
-in
 stdenv.mkDerivation (finalAttrs: {
   pname = "solarus-launcher";
   version = "2.0.0";
@@ -61,7 +34,9 @@ stdenv.mkDerivation (finalAttrs: {
 
   patches = [
     (replaceVars ./github-fetches.patch {
-      inherit qlementine-src qlementine-icons-src qtappinstancemanager-src;
+      qlementine-src = qlementine.src;
+      qlementine-icons-src = qlementine-icons.src;
+      qtappinstancemanager-src = qtappinstancemanager.src;
     })
   ];
 
@@ -69,8 +44,8 @@ stdenv.mkDerivation (finalAttrs: {
   nativeBuildInputs = [
     cmake
     ninja
-    qttools
-    wrapQtAppsHook
+    qt6.qttools
+    qt6.wrapQtAppsHook
   ];
 
   buildInputs = [
@@ -83,8 +58,8 @@ stdenv.mkDerivation (finalAttrs: {
     libmodplug
     libvorbis
     solarus
-    qtbase
-    kdePackages.qtsvg
+    qt6.qtbase
+    qt6.qtsvg
     glm
   ];