Can't start new PostgreSQL installation on Bazzite

I've recently installed Bazzite (an atomic Fedora variant) and want to get PostgreSQL running so I can continue an online development course I'm taking. I opened BoxBuddy (a.k.a. Toolbox) and successfully installed postgresql-server.x86_64 as well as postgresql.x86_64. I tried to run pg_ctl status, but got an error that PGDATA wasn't set. Fine, I set that to /etc/postgresql-setup/upgrade/postgresql.conf since the installation created that file. Now, the problem I get is pg_ctl: could not open PID file "/etc/postgresql-setup/upgrade/postgresql.conf/postmaster.pid": Not a directory. I do not have a postmaster.pid file, and in any case, postgresql.conf isn't a directory, so it couldn't contain a file itself. What has gone wrong here?