diff --git a/CMakeLists.txt b/CMakeLists.txt
index b4f34d18..2483ca25 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -7,9 +7,9 @@ set(CMAKE_CXX_FLAGS "-std=c++11 -Wall -Werror ${CMAKE_CXX_FLAGS} -O3" )
 # Hack for missing option in cctz
 option(BUILD_TESTING "" OFF)
 
-add_subdirectory(third_party/googletest)
-add_subdirectory(third_party/gflags)
-add_subdirectory(third_party/cctz)
-add_subdirectory(third_party/abseil-cpp)
+add_subdirectory(third_party/googletest EXCLUDE_FROM_ALL)
+add_subdirectory(third_party/gflags EXCLUDE_FROM_ALL)
+add_subdirectory(third_party/cctz EXCLUDE_FROM_ALL)
+add_subdirectory(third_party/abseil-cpp EXCLUDE_FROM_ALL)
 
 add_subdirectory(tools)