SystemRequirements

RScheme version 0.7.3.4-b8 or above

On debian don't forget to install the required -dev packages, e.g., zlib1g-dev for compressed repositories.

Sorry, currently there is no other scheme supported.

A port to the chicken compiler is not yet completed. We need persistent storage for all scheme data except procedures (though they would be nice).
OpenSSL. (Used to be semioptional; Askemos works with degraded security for humans who are not allowed, to use cryptography and signatures. However the current build depends on it. Will become optional again.)
PostgreSQL client library.
MySQL client library from http://www.mysql.com/ . Tested with version 3.23.43-3 to 5.0.18 (TODO make this a configure time option).
sqlite3 library version 3.3.8 or above
The pcre library from http://www.pcre.org/ with utf-8 support enabled (TODO make this a configure time option).
libmagic
A ntp server http://www.ntp.org (nodes need resonable synchronized time). optional recommended
on FreeBSD cups-base package (for /usr/local/etc/cups/mime.types)
optional: htmldoc http://www.htmldoc.org/
optional: zip/unzip
optional: fusedav; bus use our fixed version for now
optional: Jeff Kingston's Lout as formatting engine