gnubish question: installing packages in octave 3.6.4

[Robert Poor]

I just finished the epic journey of installing Octave 3.6.4 on my Mac
OSX 10.8.4 system using fink, as described in:

   http://wiki.octave.org/Octave_for_MacOS_X#Fink

Now I'd like to install some packages (namely signal).  Following the
Octave help instructions, I tried:

  octave:1> pkg install control-2.4.4.tar.gz

but that failed with this message:

  make: /sw/bin/mkoctfile-3.6.4: Command not found

(and sure enough, mkoctfile-3.6.4 does not exist in the /sw/bin
directory).  I did find a reference to Octave Forge suggesting I
download the entire package set as a .7z file, but those directions
appear to be specific to Windows.

What's the secret to loading packages on Octave 3.6.4 on Mac OSX 10.8.4?

Thanks in advance...

- rdp