Changing all the "#!/bin/sh" in the install scripts to "#!/bin/sh -e" allows the installer to stop whenever an error is encountered. But this ended up being unhelpful because the author assumed some of the commands would fail such as rm'ing non-existent directories (in case they did exist) and so the scripts keep on stopping but not leading me to the real problem. So anyway this is a huge pain to debug and I'm not going to bother. Sure wish there were install instructions other than "run the script."