Revert changes to buildPackages for nix-tools#134

eamsden wants to merge 2 commits intoinput-output-hk:masterinput-output-hk/haskell.nix:masterfrom

eamsden:eamsden/fix_callStackToNix_when_cross_compilingeamsden/haskell.nix:eamsden/fix_callStackToNix_when_cross_compilingCopy head branch name to clipboard