[rkeene@chromebook bin]$ ls -l /usr/bin/env
ls: /usr/bin/env: No such file or directory
[rkeene@chromebook bin]$ echo $LD_LIBRARY_PATH
/data/data/com.termux/files/usr/lib
[rkeene@chromebook bin]$ /usr/bin/env id
uid=10048(u0_a48) gid=10048(u0_a48) groups=3003(inet),9997(everybody),50048(all_a48)
[rkeene@chromebook bin]$

In my ~/.bash_profile:

if [ "${isTermux}" = '1' ]; then
    if [ -f "${HOME}/devel/termux-env/execve.so" -a -z "${LD_PRELOAD}" ]; then
        LD_PRELOAD="${HOME}/devel/termux-env/execve.so"
        export LD_PRELOAD
        exec -l "${BASH}"
    fi
fi