None of the samples work

[baller-paul]

When you try to run you get an error asking you to add a "program" field to the run spec.

The GitHub sample doesn't produce any results for no apparent reason.

The primitives and one other sample gave me the error
Exception has occurred.
ArgumentError (Invalid argument(s): Failed to load dynamic library '/Users/xxx/projects/dart/samples/ffi/primitives/primitives_library/libprimitives.dylib': dlopen(/Users/xxx/projects/dart/samples/ffi/primitives/primitives_library/libprimitives.dylib, 0x0001): tried: '/Users/xx/projects/dart/samples/ffi/primitives/primitives_library/libprimitives.dylib' (no such file),
...