While doing some testing, I noticed that, on Qubes-OS, running a bare xterm via qrexec in a freshly-booted VM will not set/export the QUBES_ENV_SOURCED environment variable, and thus the workaround from #204 to conditionally disable high-DPI scaling for Qubes will not trigger. This workaround should be updated so as to check for the presence of a different env var (like QREXEC_REMOTE_DOMAIN -- which appears to always be present) so that the high-DPI scaling inconsistencies observed on Qubes-OS can be disabled as desired.