Strategies for customizing configuration based on environment

[openjck]

Can anyone recommend a strategy for customizing the topgrade configuration based on environment? For example, I'd love a way to customize the steps that are enabled/disabled or the custom commands that are run based on hostname or operating system.

I synchronize my dotfiles, including topgrade.toml, between computers. I have strategies for customizing other configuration files based on the environment. For example, in .bashrc, I check the username and hostname before setting some configuration options. In .gitconfig, I use [include] to include a file named .gitconfig.local, which contains local configuration options that are not synchronized between computers. I can't think of a way to do something like this in topgrade, however, because I don't think it provides the same affordances.