diff --git a/pkgs/development/libraries/qt-5/5.7/qttools/cmake-paths.patch b/pkgs/development/libraries/qt-5/5.7/qttools/cmake-paths.patch
index fe5bcadbe9a..e3db17e978c 100644
--- a/pkgs/development/libraries/qt-5/5.7/qttools/cmake-paths.patch
+++ b/pkgs/development/libraries/qt-5/5.7/qttools/cmake-paths.patch
@@ -1,7 +1,6 @@
-Index: qttools-opensource-src-5.5.1/src/assistant/help/Qt5HelpConfigExtras.cmake.in
-===================================================================
---- qttools-opensource-src-5.5.1.orig/src/assistant/help/Qt5HelpConfigExtras.cmake.in
-+++ qttools-opensource-src-5.5.1/src/assistant/help/Qt5HelpConfigExtras.cmake.in
+diff -Naur qttools-opensource-src-5.7.1.orig/src/assistant/help/Qt5HelpConfigExtras.cmake.in qttools-opensource-src-5.7.1/src/assistant/help/Qt5HelpConfigExtras.cmake.in
+--- qttools-opensource-src-5.7.1.orig/src/assistant/help/Qt5HelpConfigExtras.cmake.in	2016-11-03 09:31:16.000000000 +0100
++++ qttools-opensource-src-5.7.1/src/assistant/help/Qt5HelpConfigExtras.cmake.in	2017-02-28 16:37:20.130457615 +0100
 @@ -2,11 +2,10 @@
  if (NOT TARGET Qt5::qcollectiongenerator)
      add_executable(Qt5::qcollectiongenerator IMPORTED)
@@ -18,11 +17,26 @@ Index: qttools-opensource-src-5.5.1/src/assistant/help/Qt5HelpConfigExtras.cmake
      _qt5_Help_check_file_exists(${imported_location})
  
      set_target_properties(Qt5::qcollectiongenerator PROPERTIES
-Index: qttools-opensource-src-5.5.1/src/linguist/Qt5LinguistToolsConfig.cmake.in
-===================================================================
---- qttools-opensource-src-5.5.1.orig/src/linguist/Qt5LinguistToolsConfig.cmake.in
-+++ qttools-opensource-src-5.5.1/src/linguist/Qt5LinguistToolsConfig.cmake.in
-@@ -44,11 +44,10 @@ endmacro()
+@@ -17,11 +16,10 @@
+ if (NOT TARGET Qt5::qhelpgenerator)
+     add_executable(Qt5::qhelpgenerator IMPORTED)
+ 
+-!!IF isEmpty(CMAKE_BIN_DIR_IS_ABSOLUTE)
+-    set(imported_location \"${_qt5Help_install_prefix}/$${CMAKE_BIN_DIR}qhelpgenerator$$CMAKE_BIN_SUFFIX\")
+-!!ELSE
+-    set(imported_location \"$${CMAKE_BIN_DIR}qhelpgenerator$$CMAKE_BIN_SUFFIX\")
+-!!ENDIF
++    set(imported_location \"@NIX_OUT@/$${CMAKE_BIN_DIR}qhelpgenerator$$CMAKE_BIN_SUFFIX\")
++    if(NOT EXISTS \"${imported_location}\")
++        set(imported_location \"@NIX_DEV@/$${CMAKE_BIN_DIR}qhelpgenerator$$CMAKE_BIN_SUFFIX\")
++    endif()
+     _qt5_Help_check_file_exists(${imported_location})
+ 
+     set_target_properties(Qt5::qhelpgenerator PROPERTIES
+diff -Naur qttools-opensource-src-5.7.1.orig/src/linguist/Qt5LinguistToolsConfig.cmake.in qttools-opensource-src-5.7.1/src/linguist/Qt5LinguistToolsConfig.cmake.in
+--- qttools-opensource-src-5.7.1.orig/src/linguist/Qt5LinguistToolsConfig.cmake.in	2016-11-03 09:31:16.000000000 +0100
++++ qttools-opensource-src-5.7.1/src/linguist/Qt5LinguistToolsConfig.cmake.in	2017-02-28 16:35:40.470100681 +0100
+@@ -44,11 +44,10 @@
  if (NOT TARGET Qt5::lrelease)
      add_executable(Qt5::lrelease IMPORTED)
  
@@ -38,7 +52,7 @@ Index: qttools-opensource-src-5.5.1/src/linguist/Qt5LinguistToolsConfig.cmake.in
      _qt5_LinguistTools_check_file_exists(${imported_location})
  
      set_target_properties(Qt5::lrelease PROPERTIES
-@@ -59,11 +58,10 @@ endif()
+@@ -59,11 +58,10 @@
  if (NOT TARGET Qt5::lupdate)
      add_executable(Qt5::lupdate IMPORTED)
  
@@ -54,7 +68,7 @@ Index: qttools-opensource-src-5.5.1/src/linguist/Qt5LinguistToolsConfig.cmake.in
      _qt5_LinguistTools_check_file_exists(${imported_location})
  
      set_target_properties(Qt5::lupdate PROPERTIES
-@@ -74,11 +72,10 @@ endif()
+@@ -74,11 +72,10 @@
  if (NOT TARGET Qt5::lconvert)
      add_executable(Qt5::lconvert IMPORTED)