I have Digest::SHA installed, but I still get an error about being unable to find Digest::SHA1:
$ perl -e 'use Digest::SHA;' $ perl build-aux/announce-gen Can't locate Digest/SHA1.pm in @INC (@INC contains: /home/rrt/local/x86_64-linux-gnu-thread-multi/lib/perl/5.14.2 /home/rrt/local/share/perl/5.14.2 /home/rrt/local/share/perl /etc/perl /usr/local/lib/perl/5.14.2 /usr/local/share/perl/5.14.2 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.14 /usr/share/perl/5.14 /usr/local/lib/site_perl .) at build-aux/announce-gen line 34. BEGIN failed--compilation aborted at build-aux/announce-gen line 34. -- http://rrt.sc3d.org