There's a good chance I've missed something obvious, but Termux:Boot isn't working for me.

I've installed Termux:Boot on my Nexus 6 running Android 7.0, and I've launched the app.

$ ls -l ~/.termux/boot/
total 4
-rwxr-xr-x 1 u0_a98 u0_a98 141 Aug  6 20:51 start
$ cat ~/.termux/boot/start
#!/data/data/com.termux/files/usr/bin/sh

crond
sshd
echo "$(date +'%a %F %T %Z') /data/data/com.termux/files/home/boot/start" >> $HOME/.log
$

(The documentation doesn't say the script needs to be executable or have a #! line, but I figured it wouldn't hurt.)

The script doesn't execute when I reboot the phone. sshd isn't running, and nothing is written to $HOME/.log.