anchor.diff:  
     composer = pkgs.stdenv.mkDerivation rec {
       version = "1.8.5";
  -    pname = "composer";
  +    pname = "php-composer";
   
       src = pkgs.fetchurl {
         url = "https://getcomposer.org/download/${version}/composer.phar";
  
positive.code: 
    phpcs = pkgs.stdenv.mkDerivation rec {
      version = "3.4.2";
      pname = "phpcs";
  
      src = pkgs.fetchurl {
        url = "https://github.com/squizlabs/PHP_CodeSniffer/releases/download/${version}/phpcs.phar";
  
negative.code: 
    phpcbf = pkgs.stdenv.mkDerivation rec {
      version = "3.4.2";
      pname = "php-phpcbf";
  
      src = pkgs.fetchurl {
        url = "https://github.com/squizlabs/PHP_CodeSniffer/releases/download/${version}/phpcbf.phar";
  