SQLite in Livebook using DbConnection smart cell

I’m trying to use the DatabaseConnection smart cell in a livebook to query a SQLite database.

When I connecti it, it says:

 {:ok, #PID<0.293.0>}

But If I try creating a query it fails with {:error, :invalid_connection} when I run:

 {:ok, statement} = Exqlite.Sqlite3.prepare(c2, "select * from table")

In fact it works if I create a connection manually:

 {:ok, c2} =Exqlite.Sqlite3.open("my.db")

But the connection is different - it’s a reference not a PID:

  {:ok, #Reference<0.4102545559.2337144860.146613>}

So how do I use the smartcell’s own connection? I’m sure I’m missing something trivial. With MySql it just works.