diff --git a/CMakeLists.txt b/CMakeLists.txt
index a5f47f9..36a1ca8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -23,6 +23,7 @@ if(FONTFORGE_FOUND)
     link_directories(${FONTFORGE_LIBRARY_DIRS})
     set(PDF2HTMLEX_LIBS ${PDF2HTMLEX_LIBS} ${FONTFORGE_LIBRARIES})
 else()
+    message("Trying to locate fontforge...")
     find_path(FF_INCLUDE_PATH fontforge/fontforge.h)
     if(FF_INCLUDE_PATH)
         message("Found fontforge.h: ${FF_INCLUDE_PATH}/fontforge/fontforge.h")
@@ -45,12 +46,14 @@ else()
     find_path(FF_CONFIG_INCLUDE_PATH config.h PATHS ${FONTFORGE_INCLUDE_DIRS})
     if(FF_CONFIG_INCLUDE_PATH)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -include ${FF_CONFIG_INCLUDE_PATH}/config.h")
+        message("Found config.h: ${FF_CONFIG_INCLUDE_PATH}/config.h")
     else()
         message("Cannot locate config.h for fontforge")
     endif()
 
     macro(wl_find_library LIB_NAME RESULT)
-        unset(RESULT)
+        unset(${RESULT})
+        unset(${RESULT} CACHE)
         foreach(FULL_LIB_NAME 
             ${CMAKE_IMPORT_LIBRARY_PREFIX}${LIB_NAME}${CMAKE_IMPORT_LIBRARY_SUFFIX}
             ${CMAKE_SHARED_LIBRARY_PREFIX}${LIB_NAME}${CMAKE_SHARED_LIBRARY_SUFFIX}
@@ -60,7 +63,6 @@ else()
             if(FULL_LIB)
                 message("Found ${LIB_NAME}: ${FULL_LIB}")
                 set(${RESULT} ${FULL_LIB})
-                unset(FULL_LIB)
                 break()
             endif()
         endforeach()