/usr/share/xen-tools/dapper.d/55-create-dev is in xen-tools 4.6.2-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/xen-tools/dapper.d/../common/55-create-dev
/usr/share/xen-tools/dapper.d/../common/55-create-dev