buildextend-metal: --build takes an argument
getopt requires a `:` in order to specify an option takes an
argument.
@@ -20,7 +20,7 @@ BIOS=
UEFI=
rc=0
build=
-options=$(getopt --options h --longoptions help,build,bios,uefi -- "$@") || rc=$?
+options=$(getopt --options h --longoptions help,build:,bios,uefi -- "$@") || rc=$?
[ $rc -eq 0 ] || {
print_help
exit 1
