...by moving reference to a package list that *deducts*
packages from a feature (that should lend itself for reuse)
to a particular distribution's configuration (that can have
some specific polish).

The problem was that basing junior on slinux feature while
adding some KDE/Qt-based packages to it failed miserably
in a hard-to-debug manner: adding every package that's been
requested but not installed by hand suddenly made it build,
see also http://altlinux.org/mkimage/debug [ru]