Index: src/Mod/Part/App/CMakeLists.txt
--- src/Mod/Part/App/CMakeLists.txt.orig
+++ src/Mod/Part/App/CMakeLists.txt
@@ -597,7 +597,7 @@ if(EIGEN3_NO_DEPRECATED_COPY)
 endif()
 
 add_library(Part SHARED ${Part_SRCS} ${FCBRepAlgoAPI_SRCS})
-target_link_libraries(Part ${Part_LIBS})
+target_link_libraries(Part ${Part_LIBS} -L/usr/X11R6/lib)
 if (FREECAD_WARN_ERROR)
     target_compile_warn_error(Part)
 endif()
