Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/ Upstream-Name: bit64 Upstream-Contact: Jens Oehlschlägel Source: https://cran.r-project.org/package=bit64 Files: * Copyright: Jens Oehlschlägel License: GPL-2 Files: debian/* Copyright: 2017 Andreas Tille License: GPL-2 License: GPL-2 On Debian systems you can find the full text of the GNU General Public License at /usr/share/common-licenses/GPL-2.