After a fresh install of Lion and Xcode 4.1 from the Mac App Store, I would like to install another version of Xcode alongside.
I heard that this perfectly safe to install it in another directory (considering the first to be on /Developer). The only thing to remember is that running xcodebuild would result in launching the last one installed.
But I have another issue while installing it, even f I changed the directory it clearly says that it will upgrade Xcode Toolset, System Tools and UNIX Development and that they can only be located is /Developer and for one installation per system, here is a screenshot :

So how to have another clean instance of Xcode and SDKs without screwing up the production one ?
Thanks a lot.
It doesn’t seem to be possible to install the System Tools on both versions. I’ve never had success with that.
One thing to note, if you install an older version of xCode side-by-side with the latest version, the “Build Archive” function in the Organizer will not function. The only remedy I found was to remove both xCodes and reinstall the one I wanted to use for building the archive. It was a painful process.