Adjusted the message to specify installing for whatever interpreter version they're running... https://gitweb.torproject.org/nyx.git/commit/?id=93f20f9
Damian: there's now a missing ')' at the end of nyx/__init__.py line 78 causing a syntax error.
Scott: thanks for the tip about the different sqlite3 versions, although my system seems to actually still use Python 2.7.14 by default.