There a few reasons why you might want to build your own distribution. You might want to build a custom install CD to match the policy of your organisation. For example, a GNOME desktop with Chrome as the web browser might be the standard desktop where you work. That touches on another motivation for wanting to create a customised installer: sometimes the creator of the distribution makes a decision that you simply don’t like. Canonical’s decision to switch to its own UI, Unity, ranks amongst its most controversial decisions. However, by using some of the methods that we explore here, you could create a distribution that is standard Ubuntu, but with a traditional desktop that you are more comfortable with.