diff --git a/CMakeLists.txt b/CMakeLists.txt
index ead43fc235047ae8969072de2d8d54a69dd9da70..23d263dd9c50b510beb8d2c395ca9421c69e91fb 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -28,7 +28,11 @@ link_directories(${csm_LIBRARY_DIRS})
 message(csm_LIBRARY_DIRS: ${csm_LIBRARY_DIRS})
 # keep only the files in a lib folder: by default the "." is in csm_LIBRARY_DIRS, 
 # which is not acceptable for target_link_directories 
-# list(FILTER ${csm_LIBRARY_DIRS} INCLUDE REGEX "/lib")
+SET(csm_LIBRARY_DIRS_LENGTH "0")
+list(LENGTH csm_LIBRARY_DIRS csm_LIBRARY_DIRS_LENGTH )
+message("$csm_LIBRARY_DIRS_LENGTH")
+list(FILTER csm_LIBRARY_DIRS EXCLUDE REGEX ".")
+message(csm_LIBRARY_DIRS: ${csm_LIBRARY_DIRS})
 
 
 #Build tests