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This document describes how to install and use MIT/GNU Scheme Pucked, an experimental version of MIT/GNU Scheme, the UnCommon Lisp. It gives installation instructions for all of the supported platforms; complete documentation of the command-line options and environment variables that control how Scheme works; and rudimentary descriptions of how to interact with the evaluator, compile and debug programs, and use the editor.
This experimental version is a snapshot of the master branch in
the MIT/GNU Scheme project source repository on Savannah, with
additional plugins. The differences between this “pucked” version
and master have been kept to a minimum. At the moment they are
focused on supporting a large library of plugins. A complete
list of user-visible changes is provided in Release Notes.
The primary distribution site for this software is
To report bugs, send email to
Please include the output of the identify-world procedure
(see Basics of Starting Scheme), so Puck knows what versions you
are using.