When executing gem install jekyll on OSX 10.8 with the standalone Command Line Tools package from Apple\'s Developer site installed (no Xcode), i run into the follo
Unfortunately, at least the last time I played with it, I found you really can't use xcrun with just the standalone Command Line Tools package. It apparently wasn't designed for that use case; the standalone package is a fairly recent innovation with Xcode 4. If the product you are trying to install really depends on xcrun, you may need to install the full Xcode.app distribution to get around it. That, or modify the distribution's Makefile et al to not use xcrun. Or, possibly (untested), create some directories and/or symlinks to fake xcrun into thinking you have Xcode.app installed - a messy hack.