raco setup hang

gistfile1.txt

[...]
raco setup: 0 running: <pkgs>/relation/scribblings/relation.scrbl
raco setup: 1 skipping: <pkgs>/unix-signals/unix-signals/unix-signals.scrbl
user break
  context...:
   user break
  context...:p
   
   call-in-empty-metacontinuation-frame
   check-break-prefix
   p
   call-in-empty-metacontinuation-frame
   call-with-empty-metacontinuation-frame-for-swap
   check-break-prefix
   l
   user break
  context...:call-with-empty-metacontinuation-frame-for-swap
   l
   
   .../setup/parallel-do.rkt:426:4
   p
   call-in-empty-metacontinuation-frame
   call-in-empty-metacontinuation-frame
   .../setup/parallel-do.rkt:426:4
   check-break-prefix
   call-with-empty-metacontinuation-frame-for-swap
   call-in-empty-metacontinuation-frame
   l
   .../setup/parallel-do.rkt:455:25
   loop
   .../setup/parallel-do.rkt:455:25
   call-in-empty-metacontinuation-frame
   dynamic-wind
   call-in-empty-metacontinuation-frame
   temp52_0
   .../setup/parallel-do.rkt:441:20: loop
   .../setup/parallel-do.rkt:441:20: loop
   call-in-empty-metacontinuation-frame
   .../racket/sandbox.rkt:928:2: user-eval
   call-in-empty-metacontinuation-frame
   proc
   proc
   call-in-em.../scribble/eval.rkt:6user break
  context...:
   call-in-empty-metacontinuation-frame
   [repeats p
   call-in-empty-metacontinuation-frame
   1 more time]
   check-break-prefix
   call-with-empty-metacontinuation-frame-for-swap
call-with-empty-metacontinuation-frame-for-swap
   03:0: do-plain-eval
   l
   .../setup/parallel-do.rkt:426:4
   .../scribble/eval.rkt:307:6
   call-in-empty-metacontinuation-frame
   call-in-empty-metacontinuation-frame
   .../scribble/eval.rkt:356:9
   .../setup/parallel-do.rkt:455:25
   call-in-empty-metacontinuation-frame
   .../private/map.rkt:40:19: loop
   [repeats .../setup/parallel-do.rkt:441:20: loop
   4 more times]
   call-in-empty-metacontinuation-frame
   proc
   .../private/manual-vars.rkt:218:40
call-in-empty-metacontinuation-frame
   [repeats 1 more time]
   call-with-empty-metacontinuation-frame-for-swap
evaluator: nested evaluator call with: #<evaluator-message>
  context...:
   do-error
   call-in-empty-metacontinuation-frame
   plumber-flush-all/wrap
   defaultpty-metacontinuation-frame
   [repeats -exit
   1 more time]
   call-in-empty-metacontinuation-frame
   call-with-empty-metacontinuation-frame-for-swap
call-with-empty-metacontinuation-frame-for-swap
user break
  context...:
   p
   call-in-empty-metacontinuation-frame
   check-break-prefix
   call-with-empty-metacontinuation-frame-for-swap
   l
   loop
   dynamic-wind
   temp52_0
   .../setup/parallel-do.rkt:236:4
   dynamic-wind
   .../setup/scribble.rkt:138:0: setup-scribblings
   call-in-empty-metacontinuation-frame
   winder-dummy
   .../setup/setup-core.rkt:72:0: setup-core
   call-in-empty-metacontinuation-frame
   body of "/Applications/Racket v7.8/collects/setup/main.rkt"
make: *** [build-docs] Error 1
interrupt: 2