Can pkgin and pkgsrc (binary and source) cooperate better?

[Mayuresh <mayuresh%acm.org@localhost>]

Build from source is more relevant when A. A binary package is not
available B. You want to configure options.

If above is not the case, a binary package helps you quickly get going.

Particularly when you are in situation where you are building something
like libreoffice after a long time and most of the dependencies need
upgrade, you wish some of the packages could be readily installed as
binary.

For a while I tried breaking the build when it tries to download a new
package, make a pkgin install of the package and resumed. But obviously
not a scalable approach...

Is there or could there be a way pkgsrc would work exactly like that?
Could it have an option to use pkgin for dependencies, unless PKG_OPTIONS
are specified in /etc/mk.conf?

Mayuresh