--- /usr/src/share/mk/src.opts.mk.orig	2018-07-21 16:58:14.076609000 +0900
+++ /usr/src/share/mk/src.opts.mk	2018-08-30 11:55:49.106365000 +0900
@@ -295,6 +295,11 @@
 .if ${__T:Marm*} == "" && ${__T:Mmips*} == "" && ${__T:Mpowerpc*} == ""
 BROKEN_OPTIONS+=LOADER_UBOOT
 .endif
+# GELI and Lua in loader currently cause boot failures on sparc64
+# Further debugging is required
+.if ${__T} == "sparc64"
+BROKEN_OPTIONS+=LOADER_GELI LOADER_LUA
+.endif
 
 .if ${__T:Mmips64*}
 # profiling won't work on MIPS64 because there is only assembly for o32