Help getting started -- trying to build csound package

[Forrest Cahoon]

On Wed, Jun 6, 2012 at 8:27 AM, Felipe Sateler <fsateler at debian.org> wrote:
> [ ... ]
>
> Forrest, please update your local copy (with gbp-pull), and then try again.
>

Ok, this time it worked -- mostly.  I got the repository and ran
git-buildpackage inside the directory.  At the end of the build, it
errored out with

Finished running lintian.
Now signing changes and any dsc files...
 signfile csound_5.17.6~dfsg-3.dsc Felipe Sateler <fsateler at debian.org>
gpg: skipped "Felipe Sateler <fsateler at debian.org>": secret key not available
gpg: /tmp/debsign.g0FGldIA/csound_5.17.6~dfsg-3.dsc: clearsign failed:
secret key not available
debsign: gpg error occurred!  Aborting....
debuild: fatal error at line 1278:
running debsign failed
gbp:error: Couldn't run 'debuild -i -I': debuild -i -I returned 29

Of course, I don't have Felipe's secret key, and that's a good thing.

The deb packages were built in the parent directory, though, and I
installed them on my system without issue.

I think that the first thing for me to do would be to update the
sources; upstream has a new csound5_17_11 release tag in their git
repo.

I've been reading lots of doc, but I'm still pretty unclear. How do I proceed?

Forrest