Backrooms,” a psychological horror flick opening this weekend, is part of a wave of breakout films from fledgling directors who honed their instincts on YouTube.

Now 20, the viral creator Kane Parsons is releasing “Backrooms,” a feature-length expansion of his web series.

The project provides lockfiles for every supported package manager. If you only have Python and a JS runtime, then you may instead run ./hatch_build.py. This will transparently invoke one of the ...