There is a nefarious bug in a project stored locally in
~/my/project/path. This project is on MELPA, but installing from MELPA fails for some reason for some users. It's unknown why it fails, but I believe I've found a fix which I've committed to a separate branch to create a pull request for discussion.
To make sure that it's a fix (I'm the only contributor able to reproduce the bug at the moment), I want to simulate installing the package from the usual means – via
M-x package-install sx – with all the necessary byte-compilation that goes along with it.