anchor.diff:      stdenv fetchurl newScope;
     inherit (lib) overrideDerivation;
   
  -  fns = {
  +  fns = rec {
       # Make a statically linked version of a haskell package.
       # Use wisely as it may accidentally kill useful files.
       staticHaskellCallPackage = path: { cabal ? pkgs.haskellPackages.cabal
  
positive.code:     stdenv = stdenv_32bit;
      inherit (gnome) libIDL;
    };
  
  
    # Until https://github.com/NixOS/nixpkgs/pull/6411 is in
  
    # Create a single file.
    writeTextFile =
      { name # the name of the derivation
      , text
      , executable ? false # run chmod +x ?
      , destination ? ""   # relative path appended to $out eg "/bin/foo"
      }:
      pkgs.runCommand name
        { inherit text executable;
          passAsFile = [ "text" ];
          # Pointless to do this on a remote machine.
          preferLocalBuild = true;
        }
        ''
          n=$out${destination}
          mkdir -p "$(dirname "$n")"
          if [ -e "$textPath" ]; then
            mv "$textPath" "$n"
          else
            echo -n "$text" > "$n"
          fi
          (test -n "$executable" && chmod +x "$n") || true
        '';
  
    # Shorthands for `writeTextFile'.
    writeText = name: text: writeTextFile {inherit name text;};
    writeTextDir = name: text: writeTextFile {inherit name text; destination = "/${name}";};
    writeScript = name: text: writeTextFile {inherit name text; executable = true;};
    writeScriptBin = name: text: writeTextFile {inherit name text; executable = true; destination = "/bin/${name}";};
  
  }
  
negative.code:     buildPecl = import <nixpkgs/pkgs/build-support/build-pecl.nix> {
        inherit (pkgs) php stdenv autoreconfHook fetchurl;
      };
  
      # Until https://github.com/NixOS/nixpkgs/pull/6411 is in
  
      # Create a single file.
      writeTextFile =
        { name # the name of the derivation
        , text
        , executable ? false # run chmod +x ?
        , destination ? ""   # relative path appended to $out eg "/bin/foo"
        }:
        pkgs.runCommand name
          { inherit text executable;
            passAsFile = [ "text" ];
            # Pointless to do this on a remote machine.
            preferLocalBuild = true;
          }
          ''
            n=$out${destination}
            mkdir -p "$(dirname "$n")"
            if [ -e "$textPath" ]; then
              mv "$textPath" "$n"
            else
              echo -n "$text" > "$n"
            fi
            (test -n "$executable" && chmod +x "$n") || true
          '';
  
      # Shorthands for `writeTextFile'.
      writeText = name: text: writeTextFile {inherit name text;};
      writeTextDir = name: text: writeTextFile {inherit name text; destination = "/${name}";};
      writeScript = name: text: writeTextFile {inherit name text; executable = true;};
      writeScriptBin = name: text: writeTextFile {inherit name text; executable = true; destination = "/bin/${name}";};
    };
  
  in rec {
  