updateRustDependencies.sh shouldn't use realpath
updateRustDependencies.sh uses the
realpath command. macOS doesn't seem to have it, and POSIX doesn't specify it.
Maybe we should use something like
(cd $x && pwd -P) instead for greater portability. (Though older shells and OSes might not have the
-P option to
pwd, it is POSIX.)
Alternatively, confirm that the current directory is a "reasonable" place to run the script from, and use relative pathnames.