I suppose you guys didn't notice this because you use Slime:
CL-USER(1): (loadsys defclass-star)
; loading system definition from ; /home/sky/projects/lisp/defclass-star/defclass-star.asd into ; #<PACKAGE "ASDF0"> ; loading system definition from ; /home/sky/.sbcl/systems/asdf-system-connections.asd into #<PACKAGE "ASDF1"> ; registering #<SYSTEM ASDF-SYSTEM-CONNECTIONS {A896251}> as ; ASDF-SYSTEM-CONNECTIONS ; registering #<SYSTEM :DEFCLASS-STAR {AAC6AC1}> as DEFCLASS-STAR ; registering #<SYSTEM #:DEFCLASS-STAR.TEST {ABEFC29}> as DEFCLASS-STAR.TEST ; registering #<SYSTEM-CONNECTION DEFCLASS-STAR-AND-CONTEXTL {AE51521}> as ; DEFCLASS-STAR-AND-CONTEXTL ; registering #<SYSTEM-CONNECTION DEFCLASS-STAR-AND-UCW {B03B859}> as ; DEFCLASS-STAR-AND-UCW ; registering #<SYSTEM-CONNECTION DEFCLASS-STAR-AND-COMPUTED-CLASS {B21BE41}> ; as DEFCLASS-STAR-AND-COMPUTED-CLASS ; registering #<SYSTEM-CONNECTION DEFCLASS-STAR-AND-CL-DEF {A788F29}> as ; DEFCLASS-STAR-AND-CL-DEF
debugger invoked on a SB-KERNEL:SIMPLE-PACKAGE-ERROR in thread #<THREAD "initial thread" RUNNING {A698551}>: The name "SWANK" does not designate any package.
...
Leslie