amd64-freebsd-10
amd64-freebsd-8
amd64-freebsd-9
arm-linux
armv6l-linux
ruby
x86-darwin-10
x86-darwin-11
x86-freebsd-9
x86-linux
x86_64-darwin-10
x86_64-darwin-11
x86_64-darwin-12
x86_64-darwin-13
x86_64-darwin-14
x86_64-darwin-15
x86_64-linux
x86_64-solaris-2.11