diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4ee42310b20..5910c5f7258 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -4,6 +4,9 @@ project(Caffe2 CXX C)
 
 # TODO(bwasti): versioning
 
+# We want CMake to GLOB everything every time.
+execute_process(COMMAND find "${PROJECT_SOURCE_DIR}" -name "CMakeLists.txt" -exec touch {} \;)
+
 # Useful functions.
 function (exclude OUTPUT INPUT)
 set(EXCLUDES ${ARGN})