diff --git a/pkgs/desktops/kde-4.8/default.nix b/pkgs/desktops/kde-4.8/default.nix
index f086b06ab9d..6404173bb12 100644
--- a/pkgs/desktops/kde-4.8/default.nix
+++ b/pkgs/desktops/kde-4.8/default.nix
@@ -15,8 +15,7 @@ let
     # kdesdk/kioslave is splitted into kioslave-svn and kioslave-git
     kdesdk = [ "kioslave" ];
     # Most of kdebindings do not compile due to a bug in the buildsystem
-    kdebindings = [ "kimono" "korundum" "kross-interpreters" "perlkde"
-      "qtruby" "qyoto" ];
+    kdebindings = [ "kimono" "korundum" "kross-interpreters" "perlkde" "qyoto" ];
   };
 
   # Extra subpackages in the manifest format
diff --git a/pkgs/desktops/kde-4.8/kdebindings/qtruby-include-smokeqt.patch b/pkgs/desktops/kde-4.8/kdebindings/qtruby-include-smokeqt.patch
new file mode 100644
index 00000000000..7d20a3c1c0b
--- /dev/null
+++ b/pkgs/desktops/kde-4.8/kdebindings/qtruby-include-smokeqt.patch
@@ -0,0 +1,13 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 33078b4..1a6ad2e 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -5,7 +5,7 @@ set(COMPILE_RUBY FALSE CACHE INTERNAL "")
+ find_package(Ruby REQUIRED)
+ find_package(Qt4 REQUIRED)
+ find_package(Smoke COMPONENTS QtCore QtGui QtXml QtOpenGl QtSql QtNetwork QtDbus QtSvg Phonon QSci QtDeclarative QtScript QtWebkit QtUiTools QtTest Qwt)
+-include_directories(${SMOKE_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/src ${QT_INCLUDES})
++include_directories(${SMOKE_INCLUDE_DIR} ${SMOKE_QTCORE_INCLUDE_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/src ${QT_INCLUDES})
+ 
+ set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${SMOKE_CMAKE_MODULE_DIR})
+ include(MacroOptionalFindPackage)
diff --git a/pkgs/desktops/kde-4.8/kdebindings/qtruby-install-prefix.patch b/pkgs/desktops/kde-4.8/kdebindings/qtruby-install-prefix.patch
new file mode 100644
index 00000000000..bd95a0d8bd3
--- /dev/null
+++ b/pkgs/desktops/kde-4.8/kdebindings/qtruby-install-prefix.patch
@@ -0,0 +1,15 @@
+diff --git a/CMakeLists.txt b/CMakeLists.txt
+index 33078b4..30aec0e 100644
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -31,8 +31,8 @@ if (NOT COMPILE_RUBY)
+     return()
+ endif (NOT COMPILE_RUBY)
+ 
+-SET(CUSTOM_RUBY_SITE_ARCH_DIR ${RUBY_SITEARCH_DIR} CACHE DIR "custom installation directory for ruby binary extension" )
+-SET(CUSTOM_RUBY_SITE_LIB_DIR ${RUBY_SITELIB_DIR} CACHE DIR "custom installation directory for ruby extension" )
++string(REPLACE "${RUBY_ROOT_DIR}" "${CMAKE_INSTALL_PREFIX}" CUSTOM_RUBY_SITE_ARCH_DIR ${RUBY_SITEARCH_DIR})
++string(REPLACE "${RUBY_ROOT_DIR}" "${CMAKE_INSTALL_PREFIX}" CUSTOM_RUBY_SITE_LIB_DIR ${RUBY_SITELIB_DIR})
+ 
+ # compute an overall version number which can be compared at once
+ MATH(EXPR RUBY_VERSION_NUMBER "${RUBY_VERSION_MAJOR}*10000 + ${RUBY_VERSION_MINOR}*100 + ${RUBY_VERSION_PATCH}")
diff --git a/pkgs/desktops/kde-4.8/kdebindings/qtruby.nix b/pkgs/desktops/kde-4.8/kdebindings/qtruby.nix
new file mode 100644
index 00000000000..5dd25899e74
--- /dev/null
+++ b/pkgs/desktops/kde-4.8/kdebindings/qtruby.nix
@@ -0,0 +1,16 @@
+{ kde, cmake, smokeqt, ruby }:
+
+kde {
+  buildInputs = [ smokeqt ruby ];
+  buildNativeInputs = [ cmake ];
+
+  # The second patch is not ready for upstream submmission. I should add an
+  # option() instead.
+  patches = [ ./qtruby-include-smokeqt.patch ./qtruby-install-prefix.patch ];
+
+  cmakeFlags="-DRUBY_ROOT_DIR=${ruby}";
+
+  meta = {
+    description = "Ruby bindings for Qt library";
+  };
+}