HEAD not building on OS X

It seems this patch 50e78dafd0cac5ca3b28ef71559899f179343ddf changed some sed expressions in rts/ghc.mk that seem to be no longer firing on my Mac now. Mac has a different flavor of BSD sed and such. The resulting contents of rts/libs.depend on my build attempt is $ cat rts/libs.depend m dl /Users/nfrisby/Source/ghc-build-trees/vanilla/rts/dist/build It's missing the -l and -L prefices that the sed commands are supposed to add. I can hack around this on my Mac, but I'll leave the fix to someone with some portable sed fu. Thanks.