> which chicken-install
/usr/bin/chicken-install
> which csi
/usr/bin/csi
> chicken-install -v
4.8.0.5
> chicken-install -repository
/usr/lib64/chicken/6
> csi -v

CHICKEN
(c) 2008-2013, The Chicken Team
(c) 2000-2007, Felix L. Winkelmann
Version 4.8.0.5 (stability/4.8.0) (rev 5bd53ac)
linux-unix-gnu-x86-64 [ 64bit manyargs dload ptables ]
compiled 2013-10-03 on aeryn.xorinia.dim (Darwin)

> csi -e '(pp (repository-path))'
"/usr/lib64/chicken/6"


and my library is in /usr/lib64/chicken/6/