Comment 8 for bug 1931611

juju will set env vars like JUJU_CHARM_HTTPS_PROXY for the hook to be able to use what the various model https/ftp/no-proxy config has been set to.

Are you saying these are not set? These are intended for use in a hook.

As far as I am aware, ~/.juju-proxy is only set for when juju run is used to run a script manually.

The /etc/juju-proxy.conf is only used for legacy proxy values, not the newer juju ones. ie if you use "juju-https-proxy" etc this file is not used.