diff --git a/project/arch.mk b/project/arch.mk
index e69de29..68bd070 100644
--- a/project/arch.mk
+++ b/project/arch.mk
@@ -0,0 +1,5 @@
+ifeq ($(OS),midipix)
+
+src/env/__libc_start_main.lo: CFLAGS_SHARED += -USHARED
+
+endif