Look @ref{Integrity, here} for finding public keys for tarball authentication.
@verbatim
-$ wget http://www.nncpgo.org/download/nncp-3.1.tar.xz
-$ wget http://www.nncpgo.org/download/nncp-3.1.tar.xz.sig
-$ gpg --verify nncp-3.1.tar.xz.sig nncp-3.1.tar.xz
-$ xz -d nncp-3.1.tar.xz
-$ tar xf nncp-3.1.tar
-$ make -C nncp-3.1 all
+$ wget http://www.nncpgo.org/download/nncp-4.2.0.tar.xz
+$ wget http://www.nncpgo.org/download/nncp-4.2.0.tar.xz.sig
+$ gpg --verify nncp-4.2.0.tar.xz.sig nncp-4.2.0.tar.xz
+$ xz -d --stdout nncp-4.2.0.tar.xz | tar xf nncp-4.2.0.tar
+$ make -C nncp-4.2.0 all
@end verbatim
There is @command{install} target respecting @env{DESTDIR}. It will
follow @ref{General, general} installation instructions
@verbatim
-# make -C nncp-3.1 install PREFIX=/usr
+# make -C nncp-4.2.0 install PREFIX=/usr
@end verbatim
@item Ubuntu 14.04