This supplements the Linux installation instructions from Sonic Pi:
- Just install
ruby2.1. The default is now 2.2, and it works just fine.
- Of the "try these" packages, I installed only
libffi-dev. I don't know if this is strictly necessary.
- You must use the Qt5 version of Scintilla because of this bug. Follow the instructions for using Qt5.
- If you get the error:
lrelease: could not exec '/usr/lib/...': No such file or directory