gentoo-overlay/licenses/no-source-code

Gentoo license note: This package is distributed in binary form and
its source code is not made available. This renders the package
non-free in terms of the Free Software Definition [1], the Open Source
Definition [2], or (for works other than software) the Definition of
Free Cultural Works [3], even if it is distributed under a free
software license. Source code is the preferred form in which a
programmer would modify the work.

Note to developers: The "no-source-code" license label must never be
used on its own, but only along with the license under which the
package is distributed. It should only be used together with licenses
that would qualify as free when used for source code.

[1] http://www.gnu.org/philosophy/free-sw.html
[2] http://opensource.org/osd
[3] http://freedomdefined.org/