I modified the foreign library packages as follows to make it work on my machine. In a previous email, someone said it worked best (at least for cello) with tcl 8.5 so we might as well make that explicit on unix.

(define-foreign-library Tcl
    (:darwin (:framework "Tcl"))
(:windows (:or "Tcl85.dll"))
(:unix (:or "libtcl8.5.so" "libtcl.so"))
(t (:default "libtcl")))

(define-foreign-library Tk
    (:darwin (:framework "Tk"))
(:windows (:or "Tk85.dll"))
(:unix (:or "libtk8.5.so" "libtk.so"))
(t (:default "libtk")))

(define-foreign-library Tile
    ;(:darwin (:framework "Tk"))
    (:windows (:or "tile078.dll"))
(:unix (:or "libtk8.5.so" "libtk.so"))
(t (:default "libtk")))