diff --git a/pkgs/development/libraries/qt-4.x/4.8/default.nix b/pkgs/development/libraries/qt-4.x/4.8/default.nix
index de9a656f6ff..d5bd065ab64 100644
--- a/pkgs/development/libraries/qt-4.x/4.8/default.nix
+++ b/pkgs/development/libraries/qt-4.x/4.8/default.nix
@@ -100,7 +100,6 @@ stdenv.mkDerivation rec {
     ++ lib.optional flashplayerFix (substituteAll {
         src = ./dlopen-webkit-nsplugin.diff;
         gtk = gtk2.out;
-        gdk_pixbuf = gdk_pixbuf.out;
       })
     ++ lib.optional stdenv.isAarch64 (fetchpatch {
         url = "https://src.fedoraproject.org/rpms/qt/raw/ecf530486e0fb7fe31bad26805cde61115562b2b/f/qt-aarch64.patch";
diff --git a/pkgs/development/libraries/qt-4.x/4.8/dlopen-webkit-nsplugin.diff b/pkgs/development/libraries/qt-4.x/4.8/dlopen-webkit-nsplugin.diff
index 14199d40503..d2ebbf3b45a 100644
--- a/pkgs/development/libraries/qt-4.x/4.8/dlopen-webkit-nsplugin.diff
+++ b/pkgs/development/libraries/qt-4.x/4.8/dlopen-webkit-nsplugin.diff
@@ -20,7 +20,7 @@ index 2fe69d1..b658e4a 100644
      // The code below has the same effect as this one:
      // Display *gdkDisplay = gdk_x11_display_get_xdisplay(gdk_display_get_default());
 -    QLibrary library(QLatin1String("libgdk-x11-2.0"), 0);
-+    QLibrary library(QLatin1String("@gdk_pixbuf@/lib/libgdk-x11-2.0"), 0);
++    QLibrary library(QLatin1String("@gtk@/lib/libgdk-x11-2.0"), 0);
      if (!library.load())
          return 0;
  
@@ -46,7 +46,7 @@ index b8c8f2a..e7f4dc5 100644
      // Display *gdkDisplay = gdk_x11_display_get_xdisplay(gdk_display_get_default());
  
 -    QLibrary library(QLatin1String("libgdk-x11-2.0"), 0);
-+    QLibrary library(QLatin1String("@gdk_pixbuf@/lib/libgdk-x11-2.0"), 0);
++    QLibrary library(QLatin1String("@gtk@/lib/libgdk-x11-2.0"), 0);
      if (!library.load())
          return 0;
  
diff --git a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
index 6b43f6ed25c..2a474ab0ffe 100644
--- a/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
+++ b/pkgs/development/libraries/qt-5/modules/qtwebkit.nix
@@ -58,7 +58,8 @@ qtModule {
     ++ optionals flashplayerFix
       [
         ''-DNIXPKGS_LIBGTK2="${getLib gtk2}/lib/libgtk-x11-2.0"''
-        ''-DNIXPKGS_LIBGDK2="${getLib gdk_pixbuf}/lib/libgdk-x11-2.0"''
+        # this file used to exist in gdk_pixbuf?
+        ''-DNIXPKGS_LIBGDK2="${getLib gtk2}/lib/libgdk-x11-2.0"''
       ]
     ++ optional (!stdenv.isDarwin) ''-DNIXPKGS_LIBUDEV="${getLib systemd}/lib/libudev"'';