RPi Perl
CPAN
CPAN seems to struggle with out of memory errors on the default Debian distribution. To get around this, you could try CPANMinus.
Steps.
sudo apt-get install curl
curl -L http://cpanmin.us | perl - --sudo App::cpanminus
sudo cpanm -i <Module Name>
Dancer
To get Dancer working with CPANminus
sudo cpanm -i Dancer