Commit 29468035e57f7e711d94622e7e4b8ffc1126f51d introduced a dependency on the racket/random module. When I try to start up anarki with the old racket, I get this error:

zck@zck-laptop:~/programs/arc/anarki$ ./arc.sh ac.scm:1117:9: cannot open module file module path: racket/random path: /gnu/store/24dg66nykhc7d85bwgq77jkmqs1zl3zm-racket-6.2.1/share/racket/collects/racket/random.rkt system error: No such file or directory; errno=2 context...: standard-module-name-resolver standard-module-name-resolver

I updated racket (I now have 6.8), and now it works. Just noting this in case anyone else has this problem.