So we can have the following code in the zlogin template:
source ${ZIM_HOME}/login_init.zsh -q &!
instead of depending on the zimfw function there. This allows fixing the
issue were a non-interactive login shell currently yields:
command not found: zimfw.
To fully fix the issue, we also need a new zshenv template containing:
ZIM_HOME=${ZDOTDIR:-${HOME}}/.zim
Templates will be updated in the install script.