PostProcess.hs: use new spelling for ghc-paths package
PostProcess.hs: use new spelling for ghc-paths package

jb55/cabal2nix,gridaphobe/cabal2nix,bennofs/cabal2nix,Fuuzetsu/cabal2nix,spencerjanssen/cabal2nix,psibi/cabal2nix,dmalikov/cabal2nix