GNU coreutils env supports a flag for it since 8.30 which translates to Debian 10 & Ubuntu 19.04. Not a perfect solution, but it appears to allow portability ac

GNU coreutils env supports a flag for it since 8.30 which translates to Debian 10 & Ubuntu 19.04. Not a perfect solution, but it appears to allow portability across the vast majority of modern OSes?