Here is how to build the wiki offline.

First, install the dependencies:

apt-get install libyaml-perl libyaml-libyaml-perl po4a \
    perlmagick libyaml-syck-perl ikiwiki

If running Debian Squeeze, also run:

apt-get install ikiwiki/squeeze-backports

Clone our main Git repository:

git clone https://git-tails.immerda.ch/tails

Then run the following command, at the root of the Git folder:

./build-wiki

You can now browse the files in

./config/chroot_local-includes/usr/share/doc/tails/website/