diff --git a/CMakeModules/Options.cmake b/CMakeModules/Options.cmake
index bfe5d15..65c3e7d 100644
--- a/CMakeModules/Options.cmake
+++ b/CMakeModules/Options.cmake
@@ -1,6 +1,7 @@
 #
 # Options, flags
 option(BUILD_TESTS "Build test binaries" OFF)
+set(DEPOT_TOOLS_PATH "" CACHE STRING "Path to your own depot_tools directory")
 set(NINJA_ARGS "" CACHE STRING "Ninja arguments to pass before compiling WebRTC")
 set(GN_EXTRA_ARGS "" CACHE STRING "Extra gn gen arguments to pass before generating build files")
 option(BUILD_SHARED_LIB "Build WebRTC as a shared library" OFF)
diff --git a/CMakeModules/Prefix.cmake b/CMakeModules/Prefix.cmake
index d721c70..3d3dcd8 100644
--- a/CMakeModules/Prefix.cmake
+++ b/CMakeModules/Prefix.cmake
@@ -1,7 +1,11 @@
 #
 # Generate environment variables
 #
-set(WEBRTC_PATH ${CMAKE_SOURCE_DIR}/depot_tools)
+if (DEPOT_TOOLS_PATH)
+  set(WEBRTC_PATH ${DEPOT_TOOLS_PATH})
+else (DEPOT_TOOLS_PATH)
+  set(WEBRTC_PATH ${CMAKE_BINARY_DIR}/depot_tools)
+endif (DEPOT_TOOLS_PATH)
 
 if (WIN32)
   get_filename_component(DEPOT_TOOLS_PYTHON_PATH