Hi David,
So I didn’t have any success pointing to dash or bash.
Or running the initial install with bash or dash as the sh link.
Clearly I’m not articulate enough with my linux 
For now have got distracted with work, but when I get the chance i’ll get back on it and maybe have more to put in this post… You know, incase anyone else comes along feeling like doing something as stupid as compiling openat on a pi… 