the chroot/ISO. Not enabled by default. Note: the files are installed under '/'
in the chroot so you have to create the rootfs structure on your own.
+ -n::
+
+Skip creation of the ISO file. This option is useful if you want to build/update
+the chroot and/or recreate the squashfs file without building an ISO file.
+
-o **OUTPUT_DIRECTORY**::
Main output directory of the build process of FAI. Some directories are created