Redshift seems to use the geoclue-2.0 package to get the location specification automatically upon its launch.
This usually works. However, whenever I don't have an active internet connection from the start, Redshift is unable to get my location and returns the error
Unable to get location from provider.
For the case of a missing internet connection, how can I make Redshift use a custom location setting and not make it try to use geoclue?