debugger invoked on a UIOP/LISP-BUILD:COMPILE-FILE-ERROR in thread
#<THREAD "main thread" RUNNING {10005504C3}>:
  COMPILE-FILE-ERROR while compiling #<CL-SOURCE-FILE "cl-async" "src" "tcp">

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

restarts (invokable by number or by possibly-abbreviated name):
  0: [RETRY                        ] Retry
                                     compiling #<CL-SOURCE-FILE "cl-async" "src" "tcp">.
  1: [ACCEPT                       ] Continue, treating
                                     compiling #<CL-SOURCE-FILE "cl-async" "src" "tcp">
                                     as having been successful.
  2:                                 Retry ASDF operation.
  3: [CLEAR-CONFIGURATION-AND-RETRY] Retry ASDF operation after resetting the
                                     configuration.
  4:                                 Retry ASDF operation.
  5:                                 Retry ASDF operation after resetting the
                                     configuration.
  6: [ABORT                        ] Exit debugger, returning to top level.

(UIOP/LISP-BUILD:CHECK-LISP-COMPILE-RESULTS NIL T T "~/asdf-action::format-action/" ((#<ASDF/LISP-ACTION:COMPILE-OP > . #<ASDF/LISP-ACTION:CL-SOURCE-FILE "cl-async" "src" "tcp">)))
   source: (ERROR 'COMPILE-FILE-ERROR :CONTEXT-FORMAT CONTEXT-FORMAT
                  :CONTEXT-ARGUMENTS CONTEXT-ARGUMENTS)