Stuck building automatic 0.8.3 on 4.2.27

Working on doing a build of automatic 0.8.3 on 4.2.27 (on a Pro6), and I'm /almost/ there.... One thing I seem to bouncing up against is that I've hit a problem installing libcurl3-dev.

# apt-get install libcurl3-dev

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  libcurl3-dev: Depends: libcurl3-openssl-dev (= 7.15.5-1etch3)
E: Broken packages


# apt-get install libcurl3-openssl-dev

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
  libcurl3-openssl-dev: Depends: libcurl3 (= 7.15.5-1etch3) but 7.21.0-2.1+squeeze4 is to be installed
E: Broken packages

What I find curious is that the /newer/ package seems to be coming from the readynas source...

# apt-cache policy libcurl3
libcurl3:
  Installed: 7.21.0-2.1+squeeze4
  Candidate: 7.21.0-2.1+squeeze4
  Version table:
 *** 7.21.0-2.1+squeeze4 0
        500 http://www.readynas.com 4.2.27/ Packages
        100 /var/lib/dpkg/status
     7.15.5-1etch3 0
        500 http://archive.debian.org etch/main Packages

My inclination might be to back up libcurl3 to 7.15... but since 7.21 seems to becoming from readynas 4.2.27 source, I have a feeling that's not such a good idea. Any ideas??