What it is What it is not Supported Implementations Examples Documentation Getting it Extensions Reporting Bugs Mailing Lists What is happening ASDF is the de facto standard build facility for Common Lisp. Your Lisp implementation probably contains a copy of ASDF, which you can load using (require "asdf") . ASDF 3 is the current successor to Daniel Barlow's ASDF. It was rewritten for improved portability, robustness, usability, extensibility, configurability, internal consistency, and the ability to deliver standalone executables. Its notable versions include pre-release 2.27 on February 1st 2013, first stable release 3.0.1 on May 16th 2013, major releases 3.1.2 on May 6th 2014, 3.2.0 on January 10th 2017 and 3.3.0 on October 6th 2017. The latest release is 3.3.1, publish...