diff --git a/pkgs/development/libraries/qt-5/default.nix b/pkgs/development/libraries/qt-5/default.nix
index be028e89ce8..d33c7e0329f 100644
--- a/pkgs/development/libraries/qt-5/default.nix
+++ b/pkgs/development/libraries/qt-5/default.nix
@@ -17,7 +17,7 @@
 with stdenv.lib;
 
 let
-  v_maj = "5.1";
+  v_maj = "5.2";
   v_min = "1";
   ver = "${v_maj}.${v_min}";
 in
@@ -28,7 +28,7 @@ stdenv.mkDerivation rec {
   src = fetchurl {
     url = "http://download.qt-project.org/official_releases/qt/"
       + "${v_maj}/${ver}/single/qt-everywhere-opensource-src-${ver}.tar.gz";
-    sha256 = "4c05742db52325e96b1d610a2388140dcc1e3d03d93faea2b2d3791015b186f6";
+    sha256 = "18bxrnyis7xbhpxpf7w42i54hs4qr062b1wx4c0dpmja3lc29sc4";
   };
 
   # The version property must be kept because it will be included into the QtSDK package name
@@ -151,7 +151,7 @@ stdenv.mkDerivation rec {
       sed '/QMAKE_DEFAULT_.*DIRS/ d' -i $out/mkspecs/qconfig.pri
     '';
 
-  #enableParallelBuilding = true; # often fails on Hydra, as well as qt4
+  enableParallelBuilding = true; # often fails on Hydra, as well as qt4
 
   meta = {
     homepage = http://qt-project.org;
diff --git a/pkgs/development/libraries/qt-5/dlopen-absolute-paths.patch b/pkgs/development/libraries/qt-5/dlopen-absolute-paths.patch
index 65b817a2b14..3163e235d02 100644
--- a/pkgs/development/libraries/qt-5/dlopen-absolute-paths.patch
+++ b/pkgs/development/libraries/qt-5/dlopen-absolute-paths.patch
@@ -1,15 +1,15 @@
 diff -ruN qt-everywhere-opensource-src-5.1.1-orig/qtbase/src/network/kernel/qhostinfo_unix.cpp qt-everywhere-opensource-src-5.1.1/qtbase/src/network/kernel/qhostinfo_unix.cpp
 --- qt-everywhere-opensource-src-5.1.1-orig/qtbase/src/network/kernel/qhostinfo_unix.cpp	2013-08-25 20:03:35.000000000 +0200
 +++ qt-everywhere-opensource-src-5.1.1/qtbase/src/network/kernel/qhostinfo_unix.cpp	2013-09-25 17:43:14.047015411 +0200
-@@ -93,7 +93,7 @@
- static void resolveLibrary()
- {
- #if !defined(QT_NO_LIBRARY) && !defined(Q_OS_QNX)
--    QLibrary lib(QLatin1String("resolv"));
-+    QLibrary lib(QLatin1String("@glibc@/lib/libresolv"));
+@@ -103,7 +103,7 @@
      if (!lib.load())
-         return;
- 
+ #endif
+     {
+-        lib.setFileName(QLatin1String("resolv"));
++        lib.setFileName(QLatin1String("@glibc@/lib/libresolv"));
+         if (!lib.load())
+             return;
+     }
 diff -ruN qt-everywhere-opensource-src-5.1.1-orig/qtbase/src/plugins/platforms/xcb/qglxintegration.cpp qt-everywhere-opensource-src-5.1.1/qtbase/src/plugins/platforms/xcb/qglxintegration.cpp
 --- qt-everywhere-opensource-src-5.1.1-orig/qtbase/src/plugins/platforms/xcb/qglxintegration.cpp	2013-08-25 20:03:35.000000000 +0200
 +++ qt-everywhere-opensource-src-5.1.1/qtbase/src/plugins/platforms/xcb/qglxintegration.cpp	2013-09-25 17:51:29.834674976 +0200
diff --git a/pkgs/development/qtcreator/default.nix b/pkgs/development/qtcreator/default.nix
index b12f81db9c4..2b0410f0874 100644
--- a/pkgs/development/qtcreator/default.nix
+++ b/pkgs/development/qtcreator/default.nix
@@ -3,8 +3,8 @@
 with stdenv.lib;
 
 let
-  baseVersion = "2.8";
-  revision = "1";
+  baseVersion = "3.1";
+  revision = "0";
   version = "${baseVersion}.${revision}";
 in
 
@@ -16,8 +16,8 @@ stdenv.mkDerivation rec {
     + optionalString sdkBuild "-qt-${qtLib.version}";
 
   src = fetchurl {
-    url = "http://download.qt-project.org/official_releases/qtcreator/${baseVersion}/${version}/qt-creator-${version}-src.tar.gz";
-    sha256 = "d5ae007a297a4288d0e95fd605edbfb8aee80f6788c7a6cfb9cb297f50c364b9";
+    url = "http://download.qt-project.org/official_releases/qtcreator/${baseVersion}/${version}/qt-creator-opensource-src-${version}.tar.gz";
+    sha256 = "c8c648f4988b707393e0f1958a8868718f27e59263f05f3b6599fa62290c2bbf";
   };
 
   # This property can be used in a nix development environment to refer to the Qt package