Dependency Problems Building for Raspbian Stretch

I'm trying to build/install Purr Data following the instructions for GNU/Linux at https://github.com/agraef/purr-data#linux on Raspbian Stretch Lite running LXDE.

The first issue I ran into is that the the following packages could not be located:

ladspa-foo-plugins
ubuntustudio-audio-plugins

So I removed those libraries and ran into the following conflict, which I have been unable to resolve.

The following packages have unmet dependencies:
  libjpeg62-turbo : Conflicts: libjpeg62
  libmagick++-dev : Depends libmagick++-6.q16-dev but it is not going to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by help packages.

Note that I did try adding the ladspa-foo-plugins PPA by going through the steps at http://kxstudio.linuxaudio.org/Repositories but it still wasn't found there so I just removed those two deps to see if I could install without them.

Any advice is appreciated. Also, if this is better suited to discussion on the mailing list let me know and I'll post there. Thanks.