BackupPC failed install on ReadyNAS NV+

proton01:/usr/lib/apache2/modules# apt-get install backuppc
Reading Package Lists... Done
Building Dependency Tree... Done
The following extra packages will be installed:
  libarchive-zip-perl libcompress-zlib-perl perl-suid wwwconfig-common
Suggested packages:
  libfile-rsyncp-perl ssh exim4 sendmail postfix mail-transport-agent w3m www-browser par2 bzip2 postgresql-client apache apache-ssl
The following NEW packages will be installed:
  backuppc libarchive-zip-perl libcompress-zlib-perl perl-suid wwwconfig-common
0 upgraded, 5 newly installed, 0 to remove and 14 not upgraded.
Need to get 733kB of archives.
After unpacking 2871kB of additional disk space will be used.
Do you want to continue? [Y/n] Y
Get:1 http://archive.debian.org sarge/main libcompress-zlib-perl 1.34-1 [50.2kB]
Get:2 http://www.readynas.com readynas/ perl-suid 5.8.8-7.infrant2 [163kB]
Get:3 http://archive.debian.org sarge/main libarchive-zip-perl 1.14-1 [85.1kB]
Get:4 http://archive.debian.org sarge/main wwwconfig-common 0.0.43 [20.6kB]
Get:5 http://archive.debian.org sarge/main backuppc 2.1.1-2sarge2 [414kB]
Fetched 733kB in 1s (646kB/s)
Selecting previously deselected package libcompress-zlib-perl.
(Reading database ... 12830 files and directories currently installed.)
Unpacking libcompress-zlib-perl (from .../libcompress-zlib-perl_1.34-1_sparc.deb) ...
Selecting previously deselected package libarchive-zip-perl.
Unpacking libarchive-zip-perl (from .../libarchive-zip-perl_1.14-1_all.deb) ...
Selecting previously deselected package wwwconfig-common.
Unpacking wwwconfig-common (from .../wwwconfig-common_0.0.43_all.deb) ...
Selecting previously deselected package perl-suid.
Unpacking perl-suid (from .../perl-suid_5.8.8-7.infrant2_sparc.deb) ...
Selecting previously deselected package backuppc.
Unpacking backuppc (from .../backuppc_2.1.1-2sarge2_all.deb) ...
Setting up libcompress-zlib-perl (1.34-1) ...
Setting up libarchive-zip-perl (1.14-1) ...
Setting up wwwconfig-common (0.0.43) ...
Setting up perl-suid (5.8.8-7.infrant2) ...
Setting up backuppc (2.1.1-2sarge2) ...
Configuring backuppc
--------------------

In order to have the Backuppc web administration interface working, I need to add an include line in your apache configuration, which will set-up a few aliases.

If you do not trust automatically modified configurations, you can add the /etc/backuppc/apache.conf include file later yourself.

Add aliases for /backuppc/ to your apache config files ? y

Web administration default user created

BackupPC can be managed through its web interface:
 http://proton01.chem.psu.edu/backuppc/


For that purpose, a web user named 'backuppc' with 'J7uGngvu' as password has been created. You can change this password by running 'htpasswd /etc/backuppc/htpasswd backuppc'.

Can't exec "/usr/bin/chfn": No such file or directory at /usr/sbin/adduser line 892.
chown: `backuppc:backuppc': invalid user
/usr/sbin/dpkg-statoverride: non-existing user backuppc

Usage: dpkg-statoverride [<option> ...] <command>

Commands:
  --add <owner> <group> <mode> <file>
                           add a new entry into the database.
  --remove <file>          remove file from the database.
  --list [<glob-pattern>]  list current overrides in the database.

Options:
  --admindir <directory>   set the directory with the statoverride file.
  --update                 immediately update file permissions.
  --force                  force an action even if a sanity check fails.
  --quiet                  quiet operation, minimal output.
  --help                   show this help message.
  --version                show the version.
/var/lib/dpkg/info/backuppc.postinst: line 83: htpasswd2: command not found
Starting backuppc: start-stop-daemon: user `backuppc' not found
 (Success)
invoke-rc.d: initscript backuppc, action "start" failed.