diff --git a/platform.txt b/platform.txt
index 878f9ee8e0..1c3e258b23 100644
--- a/platform.txt
+++ b/platform.txt
@@ -28,9 +28,10 @@ hal_dir={build.system.path}/Drivers/{build.series}_HAL_Driver
 cmsis_dir={runtime.tools.CMSIS-5.9.0.path}/CMSIS
 cmsis_dev_dir={build.system.path}/Drivers/CMSIS/Device/ST/{build.series}
 usbd_core_dir={build.system.path}/Middlewares/ST/STM32_USB_Device_Library/Core
-SrcWrapper_include_dir={runtime.platform.path}/libraries/SrcWrapper/inc
-VirtIO_include_dir={runtime.platform.path}/libraries/VirtIO/inc
-USBDevice_include_dir={runtime.platform.path}/libraries/USBDevice/inc
+builtin_library_dir={build.core.path}/../../libraries
+SrcWrapper_include_dir={builtin_library_dir}/SrcWrapper/inc
+VirtIO_include_dir={builtin_library_dir}/VirtIO/inc
+USBDevice_include_dir={builtin_library_dir}/USBDevice/inc
 
 
 # STM compile variables