Gitian OSX Build Fails due to missing .tar.xz file

When building the 3.6-beta branch of [1], I get the following error.

As a temporary workaround, it is possible to manually download [2] directly and put it in gitian-builder/inputs.

****** Starting Tor Component of Mac Bundle (1/4 for Mac) ******
[snip]
copy-to-target  inputs/multiarch-darwin11-cctools127.2-gcc42-5666.3-llvmgcc42-2336.1-Linux-120724.tar.xz build/
rsync: link_stat "/home/ubuntu/sandbox/gitian-builder/inputs/multiarch-darwin11-cctools127.2-gcc42-5666.3-llvmgcc42-2336.1-Linux-120724.tar.xz" failed: No such file or directory (2)
rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1070) [sender=3.0.9]
./bin/gbuild:22:in `system!': failed to run copy-to-target  inputs/multiarch-darwin11-cctools127.2-gcc42-5666.3-llvmgcc42-2336.1-Linux-120724.tar.xz build/ (RuntimeError)
	from ./bin/gbuild:87:in `build_one_configuration'
	from ./bin/gbuild:85:in `each'
	from ./bin/gbuild:85:in `build_one_configuration'
	from ./bin/gbuild:224
	from ./bin/gbuild:219:in `each'
	from ./bin/gbuild:219
	from ./bin/gbuild:217:in `each'
	from ./bin/gbuild:217
make: *** [build-beta] Error 1

[1] https://git.torproject.org/user/dcf/tor-browser-bundle.git [2] https://mingw-and-ndk.googlecode.com/files/multiarch-darwin11-cctools127.2-gcc42-5666.3-llvmgcc42-2336.1-Linux-120724.tar.xz