interaction of custom operators and infix macros

Realized as I was typing up docs for custom operators that we currently have a problem with composing infix macros and custom operators. Example:

operator (>>=) 16 left { $left, $right } => #{ $left.then($right) }
macro => {
    rule infix { ($params ...) | { $body ... } } => {
        function inner($params ...) { $body ... }
    }
}

foo >>= (x) => {
    return unit(x + 1);
}
// error `=>` cannot be matched...

I think this is the same problem @natefaubion ran into with assignment and infix macros which was solved by enforesting until a fixed point was reached right? The same solution should work here?