This one was discussed a while back, and I decided against adding it because it is majoritly to do with adding sources and slowing down your installer, where as our intentions are to speed up your installer process. Additionally, since creating symlinks is a one-off thing (IE: you only need to do it once), and there are other tools to achieve the same effect, it doesn't seem that reasonable for us to add it, and have users get confused with the sources and things. As such, the source is not to be added at this time. Sorry.