./bootstrap --abi 64 --full --make-jobs 8 --prefer-pkgsrc --prefix /usr/localI think the problem here is that "--prefer-pkgsrc" is not a valid argument by itself, it should be "--prefer-pkgsrc yes" or similar. The getopt parsing is a little fragile and is simply shifting over your "--prefix" argument, and then ignoring an unknown "/usr/local" argument, thus you're getting the default, and no helpful warning. We should definitely make it more robust.
That's what it was? Damn. Well, yes, it should be more robust. Thank you, John Klos