Hi Páli,

that error is reminiscent of issues when trying to move a file that is open (and implicitly locked) by another process. I have seen some sporadic issues like that in the build unfortunately (never tracked them down to the root cause though), Maybe it's something silly like one process not having enough time to clean up and close the file before the next command tries to move it? I'd add a sleep before the mv and see if that helps. Does the build proceed if you try "make" without cleaning the repository, or does it hang again at the same spot?

On Sat, Oct 25, 2014 at 1:26 PM, Páli Gábor János <pali.gabor@gmail.com> wrote:
2014-10-25 2:03 GMT+02:00 Austin Seipp <austin@well-typed.com>:
> As well as that, Gabor's bots
> (at http://haskell.inf.elte.hu/builders) also build on Windows.

Unfortunately, my builders are still suffering from the sudden
breakage induced by a Cabal library update on September 24 [1].  That
is, they are unable to complete the build due to some ghc-cabal
failure right after bootstrapping [2].  As a result, I basically
suspended the builders until I could do something with this.  Yes, I
have just checked it, the situation is still the same.

Curiously, I do not know about others who are experiencing the same
problem, however, the revisions before the referenced commit (mostly)
build just fine.

As of yet, I have not had the time and chance to even attempt to fix
this.   I have already answered Herbert the version of the build
environment (Windows 7 SP1, MinGW from July 4 (32 bit) and February 16
(64 bit), with GHC 7.6.3) -- I do not even know if that was considered
old or problematic.  I am not also sure if the developers involved in
the aforementioned change are aware of this issue and what their
opinion on this is.  I admit that I have not submitted a ticket on
this, perhaps I shall.

Probably I shall also experiment with moving to a newer version of the
toolchain per the recently revamped Windows build instructions in the
meantime.

[1] http://git.haskell.org/ghc.git/commit/4b648be19c75e6c6a8e6f9f93fa12c7a4176f0ae
[2] http://haskell.inf.elte.hu/builders/windows-x86-head/56/10.html
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