The OPT phase

During the Linux phase, packages are build by kaarpux, but installed by root into the / and /usr file systems

During the opt phase, packages are build and installed by kaarpux, as the /opt filesystem is owned by kaarpux. In this way, you can “play” with the opt packages, without touching the basic system.

Each opt package is installed in a subdirectory under /opt/kaarpux. At the end of each opt package installation, the files under /opt/kaarpux are soft-linked into /opt/bin, /opt/include, /opt/lib, etc.