mod_browserid

aptitude install libcurl4-gnutls-dev ruby cmake apache2-prefork-dev
ln -s /usr/bin/apxs2 /usr/sbin/apxs

cd /opt or /usr/local YMMV
git clone git://github.com/lloyd/yajl
cd yajl/
aptitude install ruby cmake 
./configure && make install

cd /opt or /usr/local YMMV
git clone https://github.com/mozilla/mod_browserid
cd mod_browserid/
make