Problem with CUPS/Ghostscript build order.

This is part of a thread from the HPOJ & CUPS lists.:

Bob Paddock wrote:
> 
> Which one should be build first?  Seems like that CUPS should be build first 
> so that the GhostScript build has some place to put pstoraster, but Gentoo 
> builds them in the other order.
> 
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Till Wrote:

Yes, CUPS has to be built first, Then GhostScript can be built against 
the CUPS libraries (libcups, libcupsimage) and afterwards place the 
"pstoraster" script and the "pstoraster.convs" file into the correct 
directories.
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My question is how do you change the order that things get built in?

I want to build cups then Ghostscript, but cupsdependss on Ghostscript so it 
gets built first when I try to emerge cups.

This is why cups-1.1.15 does not work right with some printers, where 1.1.14 
worked ok.