Checking for missing run-time search paths inconsistent?

[John Marino <netbsd%marino.st@localhost>]

I was surprised to see www/aws on the netbsd "doesn't build" list.
The reason is bad rpaths, which I confirmed is correct.
http://ftp.netbsd.org/pub/pkgsrc/misc/joerg/20120515.1826/aws-2.10.0.1nb2/install.log

The problem is that I'm not getting the same error with PKG_DEVELOPER=yes.
I even built it and installed it outside the chroot with PKG_DEVELOPER=yes and 
it passed.  However using readelf confirmed that DragonFly builds it with bad 
rpaths too.

Why would rpath report this inconsistently?  I confirmed the value of WRKDIR 
was embedded in the rpath, so it should have caught it.  www/aws is happy 
passing on DragonFly builds, both Tinderbox and pbulk.

John