Issues building mono with vulcan

[nterry]

So i an building mono with vulcan and I am getting the following:

bin/vulcan-make:69:in `chdir': No such file or directory - /app/vendor/mono-2.10.8 (Errno::ENOENT)
    from bin/vulcan-make:69:in `block (2 levels) in <main>'
    from bin/vulcan-make:18:in `chdir'
    from bin/vulcan-make:18:in `block in <main>'
    from /usr/local/lib/ruby/1.9.1/tmpdir.rb:83:in `mktmpdir'
    from bin/vulcan-make:17:in `<main>'
>> Downloading build artifacts to: /tmp/mono-2.10.8.tgz

The command I executed was:

vulcan build -c "./configure --enable-nls=no --prefix=/tmp/mono && make && make install" -v

I got the vanilla mono 2.10.8.1 source tarball and make exits with no errors.... According to other issues posted here, the --prefix option to configure will fix this, but as you can see, I added it.... Any ideas?