What I listed is what I played in the most recent version. I did copy my save over from the last version (v0.11, I think it was), but I can load that w/ no problem in v0.12a. If that scene didn't exist anymore, Ren'Py would throw errors about some content, files, etc., being missing. I think you should still be able to do the water / sleeping pills as I described, but since it's been awhile since I did this, I might be failing to remember other events that need to happen as well. I'm not a developer on the game, so I don't know what the code's conditionals are. (I could dig into it, but I'm too lazy to bother.)