darcsGhc86Env =
    let pkgs = ld "630e25b";
    in with pkgs ; env pkgs {
      name = "darcs-ghc86";
      buildInputs =
        [ stdenv pkgconfig gcc binutils bc
          zlib ncurses curl
          haskell.compiler.ghc865 haskellPackages.cabal-install haskellPackages.hlint
          haskellPackages.cabal-install haskellPackages.hlint
          # to get xmllint for xmlschema test
          libxml2
          lighttpd
        ];
      # workaround from https://www.mail-archive.com/nix-dev@lists.science.uu.nl/msg12162.html
      # zlib for zlib/digest, curl for darcs, ncurses for terminfo
      ldLibraryPathItems = ":${pkgs.zlib.out}/lib:${pkgs.curl.out}/lib:${pkgs.ncurses.out}/lib";
    };