okular: avoid accidental Qt 5 dependency

pkgs/desktops/kde-5/applications/default.nix

@@ -54,7 +54,9 @@ let
     libkexiv2 = callPackage ./libkexiv2.nix {};
     libkipi = callPackage ./libkipi.nix {};
     libkomparediff2 = callPackage ./libkomparediff2.nix {};
-    okular = callPackage ./okular.nix {};
+    okular = callPackage ./okular.nix {
+      inherit (srcs.okular) src version;
+    };
     print-manager = callPackage ./print-manager.nix {};
     spectacle = callPackage ./spectacle.nix {};
 

pkgs/desktops/kde-5/applications/okular.nix

@@ -1,40 +1,22 @@
-{ kdeApp
-, lib
-, automoc4
-, cmake
-, perl
-, pkgconfig
-, kdelibs
-, qimageblitz
-, poppler_qt4
-, libspectre
-, libkexiv2
-, djvulibre
-, libtiff
-, freetype
-, ebook_tools
+{
+  stdenv, lib,
+  src, version,
+  automoc4, cmake, perl, pkgconfig, kdelibs, qimageblitz,
+  poppler_qt4, libspectre, libkexiv2, djvulibre, libtiff, freetype,
+  ebook_tools
 }:
 
-kdeApp {
-  name = "okular";
-  nativeBuildInputs = [
-    automoc4
-    cmake
-    perl
-    pkgconfig
-  ];
+stdenv.mkDerivation {
+  name = "okular-${version}";
+  inherit src;
+  nativeBuildInputs = [ automoc4 cmake perl pkgconfig ];
   buildInputs = [
-    kdelibs
-    qimageblitz
-    poppler_qt4
-    libspectre
-    libkexiv2
-    djvulibre
-    libtiff
-    freetype
-    ebook_tools
+    kdelibs qimageblitz poppler_qt4 libspectre libkexiv2 djvulibre libtiff
+    freetype ebook_tools
   ];
   meta = {
+    platforms = lib.platforms.linux;
+    homepage = "http://www.kde.org";
     license = with lib.licenses; [ gpl2 lgpl21 fdl12 bsd3 ];
     maintainers = [ lib.maintainers.ttuegel ];
   };