Thanks for bringing this up. I'd messed up the instructions for that bit and placed the sudo command in the wrong place.Updated it now. For anyone stuck this is

Thanks for bringing this up. I'd messed up the instructions for that bit and placed the sudo command in the wrong place.Updated it now. For anyone stuck this is the updated instructions work: pi@raspberrypi ~ $ git clone https://github.com/njh/perl-net-sdp.git perl-net-sdp pi@raspberrypi ~ $ cd perl-net-sdp pi@raspberrypi ~/perl-net-sdp $ perl Build.PL pi@raspberrypi ~/perl-net-sdp $ sudo ./Build pi@raspberrypi ~/perl-net-sdp $ sudo ./Build test pi@raspberrypi ~/perl-net-sdp $ sudo ./Build install pi@raspberrypi ~/perl-net-sdp $ cd ..