upgrade using installto.sh gives env error

[stevenospam]

I'm upgrading from 0.8.2 to 0.8.5.  I'm trying to follow the upgrade instructions but I don't get very far.  I've ftp'd the files to a roundcubeupgrade directory.  I cd'd to the roundcubeupgrade directory and issued the ./bin/installto.sh ./roundcube-0.8.2 and get the error message:
/usr/bin/env: php: No such file or directory

I've used putty to ssh to the VPS and I'm logged on as root.  I searched the forum but don't find a report for this problem.

[SKaero]

Sounds like you don't have php-cli.

[stevenospam]

Thanks for the tip.  I found that I do have php-cli but it wasn't in the path.  I changed the path variable and it is now found but there are library problems because of the way my VPS is administered with Hepsia.  Hate it.  I guess I'll do a manual upgrade :<(