Sorry, I don't have a solution either, but I can report exact same thing here, including the weird scripting errors.
Host: Windows 7 SP1 x64
Guest: Debian Sid (kernel 3.9-1-amd64)
For obvious stability reasons, many people do not run Sid on bare metal; they will go as far as their virtualization software permits.
It's not unexpected that HGFS continues not to work, but the configuration script still does not run to completion.
Oddly enough, vmhgfs does build, albeit with warnings, but those warnings are subsequently fatal:
KanotixBox:~# mount -t vmhgfs .host:/ /mnt/hgfs
Error: cannot mount filesystem: No such device
KanotixBox:~# modprobe vmhgfs
ERROR: could not insert 'vmhgfs': Unknown symbol in module, or unknown parameter (see dmesg)
KanotixBox:~# dmesg | grep vmhgfs
[ 171.303944] vmhgfs: Unknown symbol VMCIDatagram_Send (err 0)
[ 171.304027] vmhgfs: Unknown symbol VMCIDatagram_DestroyHnd (err 0)
[ 171.304040] vmhgfs: Unknown symbol VMCIDatagram_CreateHnd (err 0)