--- cmake-3.11.4.old/Modules/FindTCL.cmake
+++ cmake-3.11.4/Modules/FindTCL.cmake
@@ -76,6 +76,7 @@
   "^.*tk([0-9]\\.*[0-9]).*$" "\\1" TK_LIBRARY_VERSION "${TK_LIBRARY}")
 
 set(TCLTK_POSSIBLE_LIB_PATHS
+  __META_PRODTREE__/tcltk/lib
   "${TCL_INCLUDE_PATH_PARENT}/lib"
   "${TK_INCLUDE_PATH_PARENT}/lib"
   "${TCL_LIBRARY_PATH}"
@@ -122,8 +123,9 @@
   tcl83 tcl8.3
   tcl82 tcl8.2
   tcl80 tcl8.0
-  PATHS ${TCLTK_POSSIBLE_LIB_PATHS}
+  PATHS __META_PRODTREE__/tcltk/lib
+        ${TCLTK_POSSIBLE_LIB_PATHS}
   PATH_SUFFIXES ${TCLTK_POSSIBLE_LIB_PATH_SUFFIXES}
   )
 
 find_library(TK_LIBRARY
@@ -136,8 +138,9 @@
   tk83 tk8.3
   tk82 tk8.2
   tk80 tk8.0
-  PATHS ${TCLTK_POSSIBLE_LIB_PATHS}
+  PATHS __META_PRODTREE__/tcltk/lib
+        ${TCLTK_POSSIBLE_LIB_PATHS}
   PATH_SUFFIXES ${TCLTK_POSSIBLE_LIB_PATH_SUFFIXES}
   )
 
 CMAKE_FIND_FRAMEWORKS(Tcl)
@@ -163,6 +166,7 @@
 endif()
 
 set(TCLTK_POSSIBLE_INCLUDE_PATHS
+  __META_PRODTREE__/tcltk/include
   "${TCL_LIBRARY_PATH_PARENT}/include"
   "${TK_LIBRARY_PATH_PARENT}/include"
   "${TCL_INCLUDE_PATH}"