diff --git a/CMakeLists.txt b/CMakeLists.txt
index d5f7651..3c778c4 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -381,7 +381,7 @@ if (DEFINED WSL_DEV_BINARY_PATH) # Development shortcut to make the package smal
                             WSL_GPU_LIB_PATH="${WSL_DEV_BINARY_PATH}/lib")
 endif()
 
-if (NOT DEFINED OFFICIAL_BUILD AND ${TARGET_PLATFORM} STREQUAL "x64")
+if (NOT OFFICIAL_BUILD AND ${TARGET_PLATFORM} STREQUAL "x64")
     add_compile_definitions(WSLA_TEST_DISTRO_PATH="${WSLA_TEST_DISTRO_SOURCE_DIR}/wslatestrootfs.vhd")
 endif()