Varnish not working on wordpress stack/OS X?

I installed bitnami-wordpress-3.5.1-1-osx-x86_64-installer.dmg but when I try to start varnish I get

+ /Applications/wordpress/varnish/bin/varnishd -a :7857 -f /Applications/wordpress/varnish/etc/varnish/default.vcl -s file,/Applications/wordpress/varnish/var/varnish/varnish_storage.bin,1G -P /Applications/wordpress/varnish/var/varnish/varnishd.pid -n /Applications/wordpress/varnish/var/varnish
SMF.s0: filename: /Applications/wordpress/varnish/var/varnish/varnish_storage.bin size 1024 MB.
Message from dlopen:
Compiled VCL program failed to load:
  dlopen(./vcl.7xCtnv7V.so, 6): no suitable image found.  Did find:
./vcl.7xCtnv7V.so: mach-o, but wrong architecture
Running dlopen failed, exit 1

VCL compilation failed

Needs more bits? I can't find a vcl.7xCtnv7V.so in my tree.