This is kind of old, but may be useful for someone.

On Sun, Jul 15, 2007 at 12:48:44AM +0000, Karsten Kruse wrote:
> Alistair Crooks schrieb:
> 
> >>Is there convertor from pkgsrc .tgz package format to .deb (or .rpm)?
> 
> >For rpms, please take a look at pkgsrc/pkgtools/genrpm
> 
> Then try ,,alien'' to convert rpm to deb. It doesn't seem to be in pkgsrc. 
> Yet.

I've packaged up alien, but it relies on GNU cpio for certain features,
so it won't work as expected on NetBSD.

If anyone wants to take a look at it, it's in:

	ftp://ftp.netbsd.org/pub/NetBSD/misc/agc/alien-pkgsrc.tgz

Regards,
Alistair