UIOP does not recognize local-nicknames keyword

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I'm attempting to make a Lisp package with uiop/package:define-package. I'm using SBCL, and have confirmed that package-local nicknaming ought to be supported:

* *features*
(:QUICKLISP :ASDF3.3 :ASDF3.2 :ASDF3.1 :ASDF3 :ASDF2 :ASDF :OS-UNIX
 :NON-BASE-CHARS-EXIST-P :ASDF-UNICODE :X86-64 :GENCGC :64-BIT :ANSI-CL
 :COMMON-LISP :ELF :IEEE-FLOATING-POINT :LINUX :LITTLE-ENDIAN
 :PACKAGE-LOCAL-NICKNAMES :SB-CORE-COMPRESSION :SB-LDB :SB-PACKAGE-LOCKS
 :SB-THREAD :SB-UNICODE :SBCL :UNIX)
* (uiop:featurep :package-local-nicknames)
T

Nevertheless, when I try to define a package that has local nicknames, it doesn't work:

(uiop/package:define-package #:foo
  (:use #:cl)
  (:local-nicknames (#:b #:binparse)))

debugger invoked on a SIMPLE-ERROR in thread
#<THREAD "main thread" RUNNING {1001878103}>:
  unrecognized define-package keyword :LOCAL-NICKNAMES

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

restarts (invokable by number or by possibly-abbreviated name):
  0: [ABORT] Exit debugger, returning to top level.

(UIOP/PACKAGE:PARSE-DEFINE-PACKAGE-FORM #:FOO ((:USE #:CL) (:LOCAL-NICKNAMES (#:B #:BINPARSE))))
   source: (ERROR "unrecognized define-package keyword ~S" KW)
0] 0    

(binparse being another package I've made, which worked fine, but which did not happen to use local nicknaming).

What I've found of the uiop/package source seems to indicate that this shouldn't happen? Going by that, it should either work, or have a specific error message indicating the non-supported-ness of local nicknames (if somehow uiop:featurep is inaccurate or changing), but it shouldn't give a generic unknown-keyword error. At this point I'm not sure what I could be getting wrong.

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Vivian On BEST ANSWER

The version of asdf that's included in releases of sbcl is based on asdf version 3.3.1 (November 2017), except bundled into only two (larger) lisp files (one for asdf and one for uiop) rather than breaking them up by purpose as is done in official releases of asdf. asdf added #+sbcl support for package-local nicknames in 3.3.3.2 (August 2019), and switched to the more general #+package-local-nicknames in 3.3.4.1 (April 2020) (the latest release version is 3.3.4, though, so that wouldn't be in yet anyway). So it's "just" a delay in pulling from upstream. Following the instructions on upgrading ASDF did the trick – extract the latest release tarball into ~/common-lisp/asdf and run (load (compile-file #P"~/common-lisp/asdf/build/asdf.lisp")) once, and future shells will use the updated version.