@ricardo @tolitius might be best to field that 😉

@ricardo: https://github.com/tolitius/cprop#merging-with-all-system-and-env

matching properties vs. all properties

i.e. on case you have {:this-prop} in your config file, an env var THIS_PROP will override it by default

whereas if you don't have {:this-prop} in your config, but still want THIS_PROP env var (and all other vars end up in your runtime config), you can do (source/from-env)