diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5bec5fbcfc45..f0ae0f5d9ec3 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,6 +64,12 @@ endif()
 include(GNUInstallDirs)
 include(FetchContent)
 include(CMakePrintHelpers)
+
+if(EXISTS "${QGC_CPM_SOURCE_CACHE}")
+    set(ENV{CPM_SOURCE_CACHE} "${QGC_CPM_SOURCE_CACHE}")
+else()
+    set(ENV{CPM_SOURCE_CACHE} "${CMAKE_BINARY_DIR}/cpm_modules")
+endif()
 include(CPM)
 
 set(CMAKE_CXX_STANDARD 20)
diff --git a/cmake/CustomOptions.cmake b/cmake/CustomOptions.cmake
index fcfa6094c9f7..ac1aec6d9372 100644
--- a/cmake/CustomOptions.cmake
+++ b/cmake/CustomOptions.cmake
@@ -78,7 +78,7 @@ set(QGC_WINDOWS_ICON_PATH "${CMAKE_SOURCE_DIR}/deploy/windows/WindowsQGC.ico" CA
 set(QGC_WINDOWS_RESOURCE_FILE_PATH "${CMAKE_SOURCE_DIR}/deploy/windows/QGroundControl.rc" CACHE FILEPATH "Windows Resource File Path")
 
 # CPM
-set(CPM_SOURCE_CACHE ${CMAKE_BINARY_DIR}/cpm_modules CACHE PATH "Directory to download CPM dependencies")
+set(QGC_CPM_SOURCE_CACHE "" CACHE PATH "Directory to Download CPM Dependencies, Overrides CPM_SOURCE_CACHE Env Variable")
 # set(CPM_USE_NAMED_CACHE_DIRECTORIES ON CACHE BOOL "Use additional directory of package name in cache on the most nested level.")
 
 # Qt