diff --git a/pkgs/development/libraries/qt-5/5.6/default.nix b/pkgs/development/libraries/qt-5/5.6/default.nix
index 8732b1061342..e815cc8f70f2 100644
--- a/pkgs/development/libraries/qt-5/5.6/default.nix
+++ b/pkgs/development/libraries/qt-5/5.6/default.nix
@@ -46,7 +46,7 @@ let
   srcs = import ./srcs.nix { inherit fetchurl; inherit mirror; };
 
   patches = {
-    qtbase = [ ./qtbase.patch ];
+    qtbase = [ ./qtbase.patch ./qtbase-fixguicmake.patch ];
     qtdeclarative = [ ./qtdeclarative.patch ];
     qtscript = [ ./qtscript.patch ];
     qtserialport = [ ./qtserialport.patch ];
diff --git a/pkgs/development/libraries/qt-5/5.6/qtbase-fixguicmake.patch b/pkgs/development/libraries/qt-5/5.6/qtbase-fixguicmake.patch
new file mode 100644
index 000000000000..8b46d432812a
--- /dev/null
+++ b/pkgs/development/libraries/qt-5/5.6/qtbase-fixguicmake.patch
@@ -0,0 +1,30 @@
+diff --git a/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in b/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
+index 0bbc871..3673634 100644
+--- a/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
++++ b/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
+@@ -286,7 +286,7 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
+     macro(_populate_$${CMAKE_MODULE_NAME}_plugin_properties Plugin Configuration PLUGIN_LOCATION)
+         set_property(TARGET Qt5::${Plugin} APPEND PROPERTY IMPORTED_CONFIGURATIONS ${Configuration})
+ 
+-        set(imported_location \"$${CMAKE_PLUGIN_DIR}${PLUGIN_LOCATION}\")
++        set(imported_location \"${PLUGIN_LOCATION}\")
+         _qt5_$${CMAKE_MODULE_NAME}_check_file_exists(${imported_location})
+         set_target_properties(Qt5::${Plugin} PROPERTIES
+             \"IMPORTED_LOCATION_${Configuration}\" ${imported_location}
+diff --git a/mkspecs/features/data/cmake/Qt5PluginTarget.cmake.in b/mkspecs/features/data/cmake/Qt5PluginTarget.cmake.in
+index 5baf0fd..3583745 100644
+--- a/mkspecs/features/data/cmake/Qt5PluginTarget.cmake.in
++++ b/mkspecs/features/data/cmake/Qt5PluginTarget.cmake.in
+@@ -2,10 +2,10 @@
+ add_library(Qt5::$$CMAKE_PLUGIN_NAME MODULE IMPORTED)
+ 
+ !!IF !isEmpty(CMAKE_RELEASE_TYPE)
+-_populate_$${CMAKE_MODULE_NAME}_plugin_properties($$CMAKE_PLUGIN_NAME RELEASE \"$${CMAKE_PLUGIN_LOCATION_RELEASE}\")
++_populate_$${CMAKE_MODULE_NAME}_plugin_properties($$CMAKE_PLUGIN_NAME RELEASE \"$${CMAKE_PLUGIN_DIR}$${CMAKE_PLUGIN_LOCATION_RELEASE}\")
+ !!ENDIF
+ !!IF !isEmpty(CMAKE_DEBUG_TYPE)
+-_populate_$${CMAKE_MODULE_NAME}_plugin_properties($$CMAKE_PLUGIN_NAME DEBUG \"$${CMAKE_PLUGIN_LOCATION_DEBUG}\")
++_populate_$${CMAKE_MODULE_NAME}_plugin_properties($$CMAKE_PLUGIN_NAME DEBUG \"$${CMAKE_PLUGIN_DIR}$${CMAKE_PLUGIN_LOCATION_DEBUG}\")
+ !!ENDIF
+ 
+ list(APPEND Qt5$${CMAKE_MODULE_NAME}_PLUGINS Qt5::$$CMAKE_PLUGIN_NAME)
diff --git a/pkgs/development/libraries/qt-5/5.9/default.nix b/pkgs/development/libraries/qt-5/5.9/default.nix
index fbf0001220b9..6fcb7a0dc5eb 100644
--- a/pkgs/development/libraries/qt-5/5.9/default.nix
+++ b/pkgs/development/libraries/qt-5/5.9/default.nix
@@ -38,7 +38,7 @@ let
   srcs = import ./srcs.nix { inherit fetchurl; inherit mirror; };
 
   patches = {
-    qtbase = [ ./qtbase.patch ] ++ optional stdenv.isDarwin ./qtbase-darwin.patch;
+    qtbase = [ ./qtbase.patch ./qtbase-fixguicmake.patch ] ++ optional stdenv.isDarwin ./qtbase-darwin.patch;
     qtdeclarative = [ ./qtdeclarative.patch ];
     qtscript = [ ./qtscript.patch ];
     qtserialport = [ ./qtserialport.patch ];
diff --git a/pkgs/development/libraries/qt-5/5.9/qtbase-fixguicmake.patch b/pkgs/development/libraries/qt-5/5.9/qtbase-fixguicmake.patch
new file mode 100644
index 000000000000..8b46d432812a
--- /dev/null
+++ b/pkgs/development/libraries/qt-5/5.9/qtbase-fixguicmake.patch
@@ -0,0 +1,30 @@
+diff --git a/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in b/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
+index 0bbc871..3673634 100644
+--- a/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
++++ b/mkspecs/features/data/cmake/Qt5BasicConfig.cmake.in
+@@ -286,7 +286,7 @@ if (NOT TARGET Qt5::$${CMAKE_MODULE_NAME})
+     macro(_populate_$${CMAKE_MODULE_NAME}_plugin_properties Plugin Configuration PLUGIN_LOCATION)
+         set_property(TARGET Qt5::${Plugin} APPEND PROPERTY IMPORTED_CONFIGURATIONS ${Configuration})
+ 
+-        set(imported_location \"$${CMAKE_PLUGIN_DIR}${PLUGIN_LOCATION}\")
++        set(imported_location \"${PLUGIN_LOCATION}\")
+         _qt5_$${CMAKE_MODULE_NAME}_check_file_exists(${imported_location})
+         set_target_properties(Qt5::${Plugin} PROPERTIES
+             \"IMPORTED_LOCATION_${Configuration}\" ${imported_location}
+diff --git a/mkspecs/features/data/cmake/Qt5PluginTarget.cmake.in b/mkspecs/features/data/cmake/Qt5PluginTarget.cmake.in
+index 5baf0fd..3583745 100644
+--- a/mkspecs/features/data/cmake/Qt5PluginTarget.cmake.in
++++ b/mkspecs/features/data/cmake/Qt5PluginTarget.cmake.in
+@@ -2,10 +2,10 @@
+ add_library(Qt5::$$CMAKE_PLUGIN_NAME MODULE IMPORTED)
+ 
+ !!IF !isEmpty(CMAKE_RELEASE_TYPE)
+-_populate_$${CMAKE_MODULE_NAME}_plugin_properties($$CMAKE_PLUGIN_NAME RELEASE \"$${CMAKE_PLUGIN_LOCATION_RELEASE}\")
++_populate_$${CMAKE_MODULE_NAME}_plugin_properties($$CMAKE_PLUGIN_NAME RELEASE \"$${CMAKE_PLUGIN_DIR}$${CMAKE_PLUGIN_LOCATION_RELEASE}\")
+ !!ENDIF
+ !!IF !isEmpty(CMAKE_DEBUG_TYPE)
+-_populate_$${CMAKE_MODULE_NAME}_plugin_properties($$CMAKE_PLUGIN_NAME DEBUG \"$${CMAKE_PLUGIN_LOCATION_DEBUG}\")
++_populate_$${CMAKE_MODULE_NAME}_plugin_properties($$CMAKE_PLUGIN_NAME DEBUG \"$${CMAKE_PLUGIN_DIR}$${CMAKE_PLUGIN_LOCATION_DEBUG}\")
+ !!ENDIF
+ 
+ list(APPEND Qt5$${CMAKE_MODULE_NAME}_PLUGINS Qt5::$$CMAKE_PLUGIN_NAME)