_build/stage1/bin/runghc is broken with Hadrian
Running _build/stage1/bin/runghc
in a Hadrian tree fails:
$ hadrian/build.cabal.sh
$ _build/stage1/bin/runghc ~/hi.hs
runghc: cannot find ghc
Running _build/stage1/bin/runghc
in a Hadrian tree fails:
$ hadrian/build.cabal.sh
$ _build/stage1/bin/runghc ~/hi.hs
runghc: cannot find ghc