On Feb 10, 2017, at 9:03 AM, Andrew Shalit <alms at clozure.com> wrote: > Don’t forget to handle the case of someone upgrading CCL to a new version that is binary incompatible. I don’t see what that should be a problem. We’re running on unix. One version of CCL can download binaries for a new CCL and run them as a sub-process. rg