libgtop 2.28.5
liblinear 1.94
libntlm 1.4
libxmlsec1 1.2.19
sord 0.12.0
lilv 0.16.0
plt-racket 5.3.6
Sometime between versions 5.2 and 5.3.6, `configure` began defaulting
to 64-bit.

Remove the `--enable-shared` configuration because PLT discourages it
and I'm not sure what it gives us.