Index: share/mk/src.opts.mk
===================================================================
--- share/mk/src.opts.mk
+++ share/mk/src.opts.mk
@@ -197,7 +197,6 @@
     BEARSSL \
     BSD_GREP \
     CLANG_EXTRAS \
-    DTRACE_TESTS \
     EXPERIMENTAL \
     GNU_GREP_COMPAT \
     HESIOD \
@@ -404,6 +403,12 @@
 __DEFAULT_YES_OPTIONS+=OPENMP
 .else
 __DEFAULT_NO_OPTIONS+=OPENMP
+.endif
+
+.if ${__T} == "amd64"
+__DEFAULT_YES_OPTIONS+=DTRACE_TESTS
+.else
+__DEFAULT_NO_OPTIONS+=DTRACE_TESTS
 .endif
 
 .include <bsd.mkopt.mk>
Index: tools/build/options/WITHOUT_DTRACE_TESTS
===================================================================
--- /dev/null
+++ tools/build/options/WITHOUT_DTRACE_TESTS
@@ -0,0 +1,5 @@
+.\" $FreeBSD$
+Set to not build and install the DTrace test suite in
+.Pa /usr/tests/cddl/usr.sbin/dtrace .
+This test suite is considered experimental on architectures other than
+amd64/amd64 and running it may cause system instability.