Index: src/Mod/Assembly/Gui/CMakeLists.txt
--- src/Mod/Assembly/Gui/CMakeLists.txt.orig
+++ src/Mod/Assembly/Gui/CMakeLists.txt
@@ -75,6 +75,11 @@ SET(AssemblyGuiIcon_SVG
 
 add_library(AssemblyGui SHARED ${AssemblyGui_SRCS} ${AssemblyGuiIcon_SVG})
 
+target_link_directories(AssemblyGui PUBLIC
+    "/usr/X11R6/lib"
+    "/usr/local/lib"
+)
+
 if(WIN32)
     target_compile_definitions(AssemblyGui PRIVATE _USE_MATH_DEFINES)
 endif(WIN32)
