Using raco/all-tools to run scribble

I've cobbled together some code to run scribble by using all-tools but it
only generates my file once - subsequent calls (using the function below)
don't generate a new file.

my log
(XX: scribble/run #(--html
/Users/spdegabrielle/Dev/clash/scribble/mouse.scrbl)
/Users/spdegabrielle/Dev/clash/html/)
 [Output to mouse.html]
(XX: scribble/run #(--html
/Users/spdegabrielle/Dev/clash/scribble/mouse.scrbl)
/Users/spdegabrielle/Dev/clash/html/)
(XX: scribble/run #(--html
/Users/spdegabrielle/Dev/clash/scribble/mouse9.scrbl)
/Users/spdegabrielle/Dev/clash/html/)


Does anyone have any idea why it only runs once?

http://docs.racket-lang.org/raco/command.html#%28def._%28%28lib._raco%2Fall-tools..rkt%29._all-tools%29%29


#(--html /Users/spdegabrielle/Dev/clash/scribble/mouse.scrbl)
 [Output to mouse.html]


#(--html /Users/spdegabrielle/Dev/clash/scribble/mouse.scrbl)


(require raco/all-tools)
;;scribble-to-html : source target body
;; generate html file from scribble file
(define (scribble-to-html source target)
  (define raco-scribble-spec (hash-ref (all-tools) "scribble"))
  (parameterize
      ([current-command-line-arguments (vector "--html" (path->string
source))]
       [current-directory target])
    (dynamic-require (cadr raco-scribble-spec) #f)))

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