Cygwin/X uses a custom build and packaging script that automates all of the tasks required to build, create binary packages, and source code packages.
Note: These instructions assume that you want to build a distribution from the source packages available from Cygwin's setup.exe. You can use these instructions to build a distribution from CVS instead by just replacing references to /usr/src/xc with the path to the xc/ directory that you checked out of CVS.
Wait for these instructions to be updated, sometime after 2004-04-03.