Although I’d installed it before, I’d never had occasion to use Sqlite until now.

I had Sqlite3 binary installed, as well as the sqlite3-ruby gem, but trying to use sqlite in Ruby would throw this

no such file to load -- sqlite3

Reinstalling sqlite3 or the Ruby gem made no difference. And I could open sqlite3 at the console just fine. Ruby didn’t see it though. The solution was here. Ditching the gem and compiling from source fixed things.