Every time Cucumber Linux is rebuilt from scratch, a new system build number (called sysbuild number) is assigned to that build. This is done due to the fact that each new build has the potential to break ABI compatibility. Using these build numbers makes it easy to keep track which ABI revision a system is on.

Build numbers are created in the format XXYYY, where XX is the last two digits of the current year (i.e. 18) and YYY is a serial number, assigned sequentially, that is unique amongst all builds in that year.

To date, here is a complete list of every build number:

* This is the Git branch that this build was built from. See https://github.com/cucumberlinux/ports.