On Tue, 10 Apr 2012 02:25:05 +0200 Janis Geiger <janisgeiger at gmx.de> wrote: > So, I assume I should uninstall Racket 5.2.2 from synaptic now and > compile 5.1.1 from source, right? Apparently the latest version is compatible with Racket 5.1.1 only. And you need to run Racket's configure script with --enable-shared.