fix self refs
suitable clang stdenv
wip libc++
livcxx build
X11 build purity
build ghc with older binary where possible
mark nixUnstable as broken on darwin
stick darwin-specifics in a conditional
libunwindNative for darwin only
missing an argument
libcxxabi needs coreutils for `cp -d`
fix boost build with clang
fix some packages on darwin
stdenvapple
haskell fixes
pleasant ruby
some improvements
add libs to GEM_PATH
stop using gross dependency resolution
allow importGems to override cp args