anchor.diff:    buildInputs = [
       cmake openssl nss pkgconfig nspr
     ];
  +  compileFlags = "-O3 ${stdenv.lib.optionalString (!debug) "-DNDEBUG"}";
   in
   stdenv.mkDerivation {
     inherit (s) name version;
  
positive.code:   preConfigure = ''
      find . -name '*.sh' -exec sed -e 's@#!/bin/sh@${stdenv.shell}@' -i '{}' ';'
      find . -name '*.sh' -exec sed -e 's@#!/bin/bash@${bash}/bin/bash@' -i '{}' ';'
    '';
  
    meta = {
  
negative.code: {stdenv, fetchurl, cmake, openssl, nss, pkgconfig, nspr, bash, debug ? false}:
  let
    s = # Generated upstream information
    rec {
  