When Emacs starts it's called from xsessionrc.shared, which is called outside of
direnv's .envrc scope. Because of this variables defined therein, like
ORG_DIRECTORY, are undefined and prevent Emacs from initializing.
I'm hard-coding the `org-directory` variable for now and removing references to
`(getenv "ORG_DIRECTORY")`.
Instead of keeping this in my ~/.profile, I'm going to define it in .envrc.
What I still don't know is how functions like `getenv` are supposed to interact
with direnv. I suppose maybe they aren't? Right now, when I call
`(getenv "DOTFILES")` from Emacs, it's `nil`, which I understand. Hopefully the
more I use direnv, the more reasonable expectations I'll have.