ion fails

[ib00]

I keep getting ion errors like:

/tmp/ion/system_packages/builtin/types_x64.ion(1): warning: Unknown declaration #directive 'static_assert'
/tmp/ion/system_packages/builtin/types_linux_x64.ion(1): warning: Unknown declaration #directive 'static_assert'
/tmp/ion/system_packages/builtin/types.ion(1): warning: Unknown declaration #directive 'foreign'

Importing tests/test1/test1.ion
error: Failed to compile package 'tests/test1/test1.ion'

Any ideas?

[tjpalmer]

Not sure. I haven't looked at this code in a very long time.