diff --git a/rust/Makefile b/rust/Makefile
index 02d25c976d..b10f0f335a 100644
--- a/rust/Makefile
+++ b/rust/Makefile
@@ -23,6 +23,10 @@ USE_TOOLS+=		bash ggrep gmake perl:build pkg-config
 # The NetBSD bootstraps are built for NetBSD 8 (because rust doesn't
 # build on 7).  Mark earlier versions as broken.
 BROKEN_ON_PLATFORM+=	NetBSD-[1-7].*-*
+# Bootstrap is built for NetBSD 9.x:
+BROKEN_ON_PLATFORM+=	NetBSD-8.*-*arm*
+BROKEN_ON_PLATFORM+=	NetBSD-8.*-aarch64
+BROKEN_ON_PLATFORM+=	NetBSD-8.*-sparc64
 
 HAS_CONFIGURE=			yes
 PYTHON_FOR_BUILD_ONLY=		yes