CHICKEN is a compiler for the Scheme programming language. CHICKEN produces portable, efficient C, supports almost all of the R5RS Scheme language standard, and includes many enhancements and extensions. CHICKEN runs on Linux, MacOS X, Windows, and many Unix flavours.



Get the tarball for the most recent release (4.1.0) here: chicken-4.1.0.tar.gz


Browse the User's manual at the CHICKEN wiki


The CHICKEN Users mailing list is a medium-volume but fast-response list for discussing all things related to CHICKEN. You can send a message to the list by addressing it to

If you are interested in the development of CHICKEN, check out CHICKEN Hackers.


The current CHICKEN development version can be accessed through the Subversion revision control system, like this:

$ svn co
(username: anonymous, password: <none>)

The CHICKEN bug tracking system is located here.


If you have any questions, suggestions or insults regarding CHICKEN, don't hesitate to join the chicken-users mailing list. Bug reports should be directed to, preferrably using the chicken-bug(1) tool.