On Mon, 20 Jan 2020, Mattias Engdegård wrote:

> +            (,command (format "%s -Q --batch --eval '(princ \"%s\")'" invocation-name ,str))
>
> Shouldn't invocation-name be something like
> (expand-file-name invocation-name invocation-directory)
> here?

You are right! Could someone push that fix? [I won't be at my machine 
until several hours]