```common-lisp CL-USER> (defpackage :ttt (:shadow #:cons) (:shadowing-import-from #:ext #:gc) (:use :cl)) #<"TTT" package> CL-USER> (package-shadowing-symbols :ttt) (GC TTT::CONS) CL-USER> (defpackage :ttt (:shadow #:cons) (:shadowing-import-from #:ext #:gc) (:use :cl)) #<"TTT" package> CL-USER> (package-shadowing-symbols :ttt) (TTT::CONS GC TTT::CONS) CL-USER> (defpackage :ttt (:shadow #:cons) (:shadowing-import-from #:ext #:gc) (:use :cl)) #<"TTT" package> CL-USER> (package-shadowing-symbols :ttt) (TTT::CONS TTT::CONS GC TTT::CONS) ``` ```common_lisp (format t "~&~@{~12@A ~S~%~}" :version (lisp-implementation-version) :vcs-id (ext:lisp-implementation-vcs-id) :os (software-type) :os-version (software-version) :machine-type (machine-type) :features *features*) VERSION "24.5.10" VCS-ID "294da20f" OS "Linux" OS-VERSION "6.16.12-amd64" MACHINE-TYPE "x86_64" FEATURES (:CLOSER-MOP :CL-PPCRE :NAMED-READTABLES :SWANK :SERVE-EVENT :QUICKLISP :ASDF-PACKAGE-SYSTEM :ASDF3.1 :ASDF3 :ASDF2 :ASDF :OS-UNIX :NON-BASE-CHARS-EXIST-P :ASDF-UNICODE :WALKER :CDR-6 :GRAY-STREAMS-MODULE :CDR-1 :CDR-5 :LINUX :FORMATTER :CDR-7 :ECL :COMMON :COMMON-LISP :ANSI-CL :FFI :PREFIXED-API :CDR-14 :PACKAGE-LOCAL-NICKNAMES :CLOS :ECL-PDE :LONG-FLOAT :UNIX :THREADS :ECL-READ-WRITE-LOCK :BOEHM-GC :ECL-WEAK-HASH :DFFI :IEEE-FLOATING-POINT :FLOATING8d9f3c171-POINT-EXCEPTIONS :LONG-LONG :LITTLE-ENDIAN :UINT8-T :UINT16-T :UINT32-T :UINT64-T :COMPLEX-FLOAT :DLOPEN :CMU-FORMAT :CLOS-STREAMS :UNICODE :X86_64) ``` Actually, ECL was compiled from 8d9f3c171. I don't know why a different version is identified above.