[Nix-dev] Failing fetchgit

[Lluís Batlle i Rossell]

Hello,

I'm trying to build a modified mplayer2, and fetchgit fails for me here:

building path(s) `/nix/store/pz99as04g52ynfcs1g6db8ga34z6mv7a-git-export'
exporting git://git.mplayer2.org/mplayer2.git (rev
d3c580156c0b8777ff082426ebd61bb7ffe0c225) into /nix/store/pz99as04g52ynfcs1g6db8ga34z6mv7a-git-export
fatal: unable to access '/homeless-shelter/.config/git/config': Permission denied
builder for `/nix/store/mkv0280c1vwdn10f4z022x80d7jzbmmw-git-export.drv' failed with exit code 128
cannot build derivation `/nix/store/7pdlkfnxzdirs762rlvi5z50hd68jvn4-mplayer2-20130130.drv': 1 dependencies couldn't be built


Does anybody know what is this problem about?

Regards,
Lluís.