so the underlaying use case of the preceding commit is so
generic, that we gain a lot in reasoning to give it an
appropriate name.
As the comment states:
image media needs to override host config short of mkForce
mkOptionDefault=mkOverride1500;# priority of option defaults
mkDefault=mkOverride1000;# used in config sections of non-user modules to set a default
mkImageMediaOverride=mkOverride60;# image media profiles can be derived by inclusion into host config, hence needing to override host config, but do allow user to mkForce
mkForce=mkOverride50;
mkVMOverride=mkOverride10;# used by ‘nixos-rebuild build-vm’