fset not loading on SBCL 2.4.5 with quickload

[peterlopen]

hi,

when I try (ql:quickload "fset"):

COMPILE-FILE-ERROR while
compiling #<CL-SOURCE-FILE "fset" "Code" "port">
   [Condition of type UIOP/LISP-BUILD:COMPILE-FILE-ERROR]

Restarts:
 0: [RETRY] Retry compiling #<CL-SOURCE-FILE "fset" "Code" "port">.
 1: [ACCEPT] Continue, treating compiling #<CL-SOURCE-FILE "fset" "Code" "port"> as having been successful.
 2: [RETRY] Retry ASDF operation.
 3: [CLEAR-CONFIGURATION-AND-RETRY] Retry ASDF operation after resetting the configuration.
 4: [RETRY] Retry ASDF operation.
 5: [CLEAR-CONFIGURATION-AND-RETRY] Retry ASDF operation after resetting the configuration.
 --more--

Backtrace:
  0: (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 "fset" "Code" "port">)))
  1: ((SB-PCL::EMF ASDF/ACTION:PERFORM) #<unused argument> #<unused argument> #<ASDF/LISP-ACTION:COMPILE-OP > #<ASDF/LISP-ACTION:CL-SOURCE-FILE "fset" "Code" "port">)
  2: ((LAMBDA NIL :IN ASDF/ACTION:CALL-WHILE-VISITING-ACTION))
  3: ((:METHOD ASDF/ACTION:PERFORM-WITH-RESTARTS :AROUND (T T)) #<ASDF/LISP-ACTION:COMPILE-OP > #<ASDF/LISP-ACTION:CL-SOURCE-FILE "fset" "Code" "port">) [fast-method]
  4: ((:METHOD ASDF/PLAN:PERFORM-PLAN (T)) #<ASDF/PLAN:SEQUENTIAL-PLAN {10015C39A3}>) [fast-method]
  5: ((FLET SB-C::WITH-IT :IN SB-C::%WITH-COMPILATION-UNIT))
  6: ((:METHOD ASDF/PLAN:PERFORM-PLAN :AROUND (T)) #<ASDF/PLAN:SEQUENTIAL-PLAN {10015C39A3}>) [fast-method]
  7: ((:METHOD ASDF/OPERATE:OPERATE (ASDF/OPERATION:OPERATION ASDF/COMPONENT:COMPONENT)) #<ASDF/LISP-ACTION:LOAD-OP > #<ASDF/SYSTEM:SYSTEM "fset"> :PLAN-CLASS NIL :PLAN-OPTIONS NIL) [fast-method]
  8: ((SB-PCL::EMF ASDF/OPERATE:OPERATE) #<unused argument> #<unused argument> #<ASDF/LISP-ACTION:LOAD-OP > #<ASDF/SYSTEM:SYSTEM "fset"> :VERBOSE NIL)
  9: ((LAMBDA NIL :IN ASDF/OPERATE:OPERATE))
 10: ((:METHOD ASDF/OPERATE:OPERATE :AROUND (T T)) #<ASDF/LISP-ACTION:LOAD-OP > #<ASDF/SYSTEM:SYSTEM "fset"> :VERBOSE NIL) [fast-method]
 11: ((SB-PCL::EMF ASDF/OPERATE:OPERATE) #<unused argument> #<unused argument> ASDF/LISP-ACTION:LOAD-OP "fset" :VERBOSE NIL)
 12: ((LAMBDA NIL :IN ASDF/OPERATE:OPERATE))
 13: ((:METHOD ASDF/OPERATE:OPERATE :AROUND (T T)) ASDF/LISP-ACTION:LOAD-OP "fset" :VERBOSE NIL) [fast-method]
 14: (ASDF/SESSION:CALL-WITH-ASDF-SESSION #<FUNCTION (LAMBDA NIL :IN ASDF/OPERATE:OPERATE) {10015BD6AB}> :OVERRIDE T :KEY NIL :OVERRIDE-CACHE T :OVERRIDE-FORCING NIL)
 15: ((LAMBDA NIL :IN ASDF/OPERATE:OPERATE))
 16: (ASDF/SESSION:CALL-WITH-ASDF-SESSION #<FUNCTION (LAMBDA NIL :IN ASDF/OPERATE:OPERATE) {100159FF8B}> :OVERRIDE NIL :KEY NIL :OVERRIDE-CACHE NIL :OVERRIDE-FORCING NIL)
 17: ((:METHOD ASDF/OPERATE:OPERATE :AROUND (T T)) ASDF/LISP-ACTION:LOAD-OP "fset" :VERBOSE NIL) [fast-method]
 18: (ASDF/OPERATE:LOAD-SYSTEM "fset" :VERBOSE NIL)
 19: (QUICKLISP-CLIENT::CALL-WITH-MACROEXPAND-PROGRESS #<FUNCTION (LAMBDA NIL :IN QUICKLISP-CLIENT::APPLY-LOAD-STRATEGY) {100159FE1B}>)
 --more--

looks like cause can be package locks:

; SLIME 2.28
CL-USER> (ql:quickload "fset")
To load "fset":
  Load 1 ASDF system:
    fset
; Loading "fset"
..
; 
; caught ERROR:
;   READ error during COMPILE-FILE:
;   
;     Lock on package SB-EXT violated when interning ONCE-ONLY while in package
;     FSET.
;   See also:
;     The SBCL Manual, Node "Package Locks"
;   
;     (in form starting at line: 364, column: 0, position: 11230)

when I unlock sb-ext, there is another error

any idea how to get fset to load?

thank you.