The function COMMON-LISP-USER::CL-CFFI-GTK-BUILD-INFO is undefined ?

[prehonor]

• (cl-cffi-gtk-build-info)

debugger invoked on a UNDEFINED-FUNCTION in thread
#<THREAD "main thread" RUNNING {1001F580E3}>:
The function COMMON-LISP-USER::CL-CFFI-GTK-BUILD-INFO is undefined.

Type HELP for debugger help, or (SB-EXT:EXIT) to exit from SBCL.

restarts (invokable by number or by possibly-abbreviated name):
0: [CONTINUE ] Retry using CL-CFFI-GTK-BUILD-INFO.
1: [USE-VALUE] Use specified function
2: [ABORT ] Exit debugger, returning to top level.

(SB-IMPL::RETRY-%COERCE-NAME-TO-FUN CL-CFFI-GTK-BUILD-INFO NIL)
0]

[prehonor]

(gtk:cl-cffi-gtk-build-info) is worked, why?