Setting up the build environment on HDD
In earlier days, Alpine Linux used a separate Gentoo build environment. Install Alpine Linux in System Disk mode i.e traditional or classic harddisk installation.
Alternates methods are to setup a clean Alpine Linux build environment inside another system, using a chroot or some form of virtualization. The host system may also be Alpine Linux, or may be something else.
Upgrade to edge
An upgrade of Alpine Linux from a stable version to the rolling development version edge basically requires the same steps as Upgrading to latest release.
The crucial difference is, that when editing the /etc/apk/repositories file, all referenced repository versions (such as v3.22
or latest-stable
) therein need to be pointing to edge
as follows.
Contents of /etc/apk/repositories
When using edge branch, testing repository can be added as a tagged repository as shown above. Remember that, packages in testing repository have no support.

After upgrading to edge, the currently installed edge version i.e the build date that is attached to the edge release may be checked with command:
$ cat /etc/alpine-release
Contribute
Proceed to create new package or create and submit patches for Alpine Linux.