mxcl/homebrew — pull request #15879 by dholm (2012-11-06 07:12:05+00:00)
Title: Replace the hardcoded MacOS SDK version with the version of the host

otx is hardcoded to use the MacOSX10.6 SDK which is no longer available in
Mountain Lion. By replacing this with MacOSX#{MacOS.version} the package can
be successfully built even on 10.8.