Thomas Davie
That file never appears to try to copy anything to /usr/local/lib/ ghc-6.6/imports/Hat (which is where I would expect hi files to end up) or /usr/local/lib/ghc-6.6/ (which is where I'd expect libHShat.a to end up, and why ghc-pkg register fails)...
The libHShat.a library ends up in $DESTDIR$PREFIX/lib/hat-$HATVERSION/$MACHINE/ghc-$GHCSYM which should resolve in your case to /usr/local/lib/hat-2.05/x86-darwin/ghc-6.6/ and the interface files should go in $DESTDIR$PREFIX/imports/hat-$HATVERSION/ghc-$GHCSYM which again should resolve to /usr/local/imports/hat-2.05/ghc-6.6 These locations are then written into the hat-package.conf file, and ghc-pkg register is called using that file as input. I'm not sure how it can go wrong, unless for some reason your version of GHC is being detected wrongly as < 6.4. Regards, Malcolm