using apt tools should give you the answer:
Package: zenbuntu-desktop
Version: 3.3
Architecture: all
Maintainer: Zentyal Packaging Maintainers <
pkg-team@zentyal.com>
Installed-Size: 253
Depends: zenbuntu-core (>= 3.3~1), xorg, firefox, lxdm, lxde, xdg-user-dirs, gksu, libnss3-tools, xscreensaver, evince, plymouth-theme-ubuntu-logo, gtk2-engines
Homepage:
http://www.zentyal.org/Priority: optional
Section: metapackages
Filename: pool/main/z/zenbuntu-desktop/zenbuntu-desktop_3.3_all.deb
Size: 59080
SHA256: 25e5594d932eddfba4894af922c206d7029b30cd83a0f2b2812e663d5b38681a
SHA1: 0f1b087602481dfb95fa9c3659a1b387ecef3c04
MD5sum: b4aabd08f2888ed850def59d1ff24743
Description: Zentyal Desktop Environment for Ubuntu Server
This package ships scripts and branding stuff included in
the Zentyal installer to setup the Zentyal system.