[racket] Error while installing nightlies

Hi,

I can't install nightlies due to an error (see below).
This happens with both Utah's and NW's versions of Ubuntu Precise Pangolin
64bits, with Unix-style install.

Anyone else seeing this?

Laurent

[...]
Checking the integrity of the binary archive... ok.
Unpacking into "/usr/racket-5.90.0.11-tmp-install" (Ctrl+C to abort)...
Done.
Moving bin -> /usr/bin
Moving collects -> /usr/share/racket-5.90.0.11/collects
Moving doc -> /usr/share/racket-5.90.0.11/doc
Moving lib -> /usr/lib/racket-5.90.0.11
Moving include -> /usr/include/racket-5.90.0.11
Moving share/applications -> /usr/share/applications
Moving share -> /usr/share/racket-5.90.0.11
Moving etc -> /usr/etc/racket-5.90.0.11
Moving man -> /usr/share/man
Moving README -> /usr/share/racket-5.90.0.11/doc/README
*** Error: undoing changes...
split-path: path is an empty string
  context...:

/usr/racket-5.90.0.11-tmp-install/collects/setup/unixstyle-install.rkt:272:21:
for-loop

/usr/racket-5.90.0.11-tmp-install/collects/setup/unixstyle-install.rkt:267:2:
for-loop

/usr/racket-5.90.0.11-tmp-install/collects/setup/unixstyle-install.rkt:450:0:
move/copy-distribution
   (submod
/usr/racket-5.90.0.11-tmp-install/collects/setup/unixstyle-install.rkt
main): [running body]
Error: installation failed
  (Removing installation files in /usr/racket-5.90.0.11-tmp-install)
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