diff --git a/platformio.ini b/platformio.ini
index 4fef7dfdf01092fb98474b2ec276c385354a677e..cb1cbced5b92421ebb6cbf96928183e64713488c 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -18,5 +18,9 @@ build_src_filter = +<ch32v003evt> +<examples/blink>
 [env:fulldemo]
 build_src_filter = +<ch32v003evt> +<examples/fulldemo>
 
+; sandbox demo does currently not compile (undefined reference to `__get_dscratch0')
+;[env:sandbox]
+;build_src_filter = +<ch32v003evt> +<examples/sandbox>
+
 [env:ws2812demo]
 build_src_filter = +<ch32v003evt> +<examples/ws2812demo>