I looked into it and, you were right, ANT doesn't ship with Mavericks. So here's my quandary: I am also planning on adding an older version of ANT to homebrew/versions. Is this completely separate from this formula? If a user has the old version installed (will be ant181), how can I check for it? `Formula["ant181"]`? If that's the case I will specify that at least one version must be installed for this formula to install, and that this formula will install to all installed versions of ANT.