Something like the attached patch should suffice. Is it acceptable?
Index: debian/postinst
===================================================================
--- debian/postinst (revision 37157)
+++ debian/postinst (working copy)
@@ -330,6 +330,8 @@
major=$(grep "[0-9] misc$" /proc/devices | sed 's/[
]\+misc//')
minor=$(grep "[0-9] device-mapper$" /proc/misc | sed
's/[ ]\+device-mapper//')
mknod /target/dev/mapper/control c $major $minor
+ # We need the crypto devices also (if any)
+ cp -a /dev/mapper/crypt* /target/dev/mapper/ 2>
/dev/null || true
fi
if pvdisplay | grep -iq "physical volume ---"; then
apt-install lvm2
