Could you please creat a ticket on trac with the patch?
On Thursday, March 13, 2014, Florian Weimer <fw@deneb.enyo.de> wrote:
The instructions at <https://ghc.haskell.org/trac/ghc/wiki/Newcomers>
were slightly outdated, and result in a rather confusing error
messsage:
$ ./sync-all --testsuite get
Unrecognised flag: --testsuite at ./sync-all line 872.
== Checking for old haddock repo
== Checking for old binary repo
== Checking for old mtl repo
== Checking for old Cabal repo
== Checking for old time from tarball
============================
ATTENTION!
You have an old time package in your GHC tree!
Please remove it (e.g. "rm -r libraries/time"), and then run
"./sync-all get" to get the new repository.
============================
== Checking for obsolete Git repo URL
$
The patch corrects the error message. I've removed the --testsuite
flag from the wiki page as well.