Just took a swing at it and forcing traceable seemed to do the trick. It really had me bamboozled as the elfs worked on other DH servers but not the one I was compiling them on - which was ultimately a good thing otherwise I'd never have known about this potential point of failure that would have been all but impossible for me to determine had it occurred somewhere I didn't have access.
Many thanks for your exceptionally prompt attention and accurate advice regarding grsec!
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