diff --git a/tools/tools/nanobsd/make.conf b/tools/tools/nanobsd/make.conf
index 653a228a361a..968c4e6ac049 100644
--- a/tools/tools/nanobsd/make.conf
+++ b/tools/tools/nanobsd/make.conf
@@ -38,3 +38,19 @@ NOGAMES=yes
 NOINFO=yes
 NO_MODULES=yes
 NO_PF=YES
+
+# If this macro is defined, UFS volume labels are used on
+# the flash image to avoid hardcoding device names.
+#WITH_GEOM_VOL=	yes
+ 
+# The configuration slice can be primed by copying a master
+# directory tree
+#CFGMASTER=	${.CURDIR}/nanobsd.etc
+
+# The flash image can be further customized by a script.
+# An example one is provided.
+#CUSTOMIZE=		${.CURDIR}/customize.sh
+
+# The example customization script can be passwd a list of local
+# files or packages to be installed on the image.
+#CUSTOMIZE_ARGS=	${.CURDIR}/localfiles