short answer: no

Long answer, quoting from a mail to someone else:

Well, I can tell you that it assumes a POSIX system, both in available utilities and system calls, So you'd need to use cygwin or something like that. (Perhaps you already are for git, I think git also assumes a POSIX system.) So you need a Haskell that can target that. What this page refers to as "GHC-Cygwin": http://www.haskell.org/ghc/docs/6.6/html/building/platforms.html I don't know where to get one. Did find this: http://copilotco.com/mail-archives/haskell-cafe.2007/msg00824.html

(There are probably also still some places where it assumes / as a path separator, although I fixed some. Probably almost all are fixed now.)

FWIW, git-annex works fine on OS X and other fine proprietary unixen. ;P --Joey

Alternatively, windows versions of these functions could be found, which are all the ones that need POSIX, I think. A fair amount of this, the stuff to do with signals and users, could be empty stubs in windows. The file manipulation, particularly symlinks, would probably be the main challenge.

addSignal
blockSignals
changeWorkingDirectory
createLink
createSymbolicLink
emptySignalSet
executeFile
fileMode
fileSize
forkProcess
getAnyProcessStatus
getEffectiveUserID
getEnvDefault
getFileStatus
getProcessID
getProcessStatus
getSignalMask
getSymbolicLinkStatus
getUserEntryForID
getUserEntryForName
groupWriteMode
homeDirectory
installHandler
intersectFileModes
isRegularFile
isSymbolicLink
modificationTime
otherWriteMode
ownerWriteMode
readSymbolicLink
setEnv
setFileMode
setSignalMask
sigCHLD
sigINT
unionFileModes