■

debuild時にlintianに

E:(パッケージ名)copyright-should-refer-to-common-license-file-for-gpl

lintian -i (パッケージ名).changesは

Packages distributed under the GNU GPL must make reference to
/usr/share/common-licenses as the location of the GPL on Debian
systems.

Refer to Policy Manual, section 12.5 for details.

http://www.debian.org/doc/debian-policy/ch-docs.html

と言われてしまうのは
debian/copyrightに

     the license for distribution is GPL.

+    On Debian GNU/Linux systems, the complete text of the GNU General
+    Public License can be found in `/usr/share/common-licenses/GPL'.
+

のように挟み込んだら黙ったけど、これどこでGPLと判断してるんだろう...