This is the Debian package of GNU Guile, downloaded from
ftp.gnu.org/pub/guile.

Guile is protected by the terms of the GNU General Public License
which you can find in /usr/share/common-licenses/GPL.  Guile is also
covered by the following exception clause:

  As a special exception, the Free Software Foundation gives
  permission for additional uses of the text contained in its release
  of GUILE.

  The exception is that, if you link the GUILE library with other
  files to produce an executable, this does not by itself cause the
  resulting executable to be covered by the GNU General Public
  License.  Your use of that executable is in no way restricted on
  account of linking the GUILE library code into it.

  This exception does not however invalidate any other reasons why the
  executable file might be covered by the GNU General Public License.

  This exception applies only to the code released by the Free
  Software Foundation under the name GUILE.  If you copy code from
  other Free Software Foundation releases into a copy of GUILE, as the
  General Public License permits, the exception does not apply to the
  code that you add in this way.  To avoid misleading anyone as to the
  status of such modified files, you must delete this exception notice
  from them.

  If you write modifications of your own for GUILE, it is your choice
  whether to permit this exception to apply to your modifications.  If
  you do not wish that, delete this exception notice.