anchor.diff:      };
     };
   
  -  phpstan = pkgs.stdenv.mkDerivation rec {
  +  phpstan = mkDerivation rec {
       version = "0.11.5";
  -    pname = "php-phpstan";
  +    pname = "phpstan";
   
       src = pkgs.fetchurl {
         url = "https://github.com/phpstan/phpstan/releases/download/${version}/phpstan.phar";
  
positive.code:     };
    };
  
    phpcs = pkgs.stdenv.mkDerivation rec {
      version = "3.4.2";
      pname = "php-phpcs";
  
      src = pkgs.fetchurl {
        url = "https://github.com/squizlabs/PHP_CodeSniffer/releases/download/${version}/phpcs.phar";
  
negative.code:     };
    };
  
    composer = mkDerivation rec {
      version = "1.8.5";
      pname = "composer";
  
      src = pkgs.fetchurl {
        url = "https://getcomposer.org/download/${version}/composer.phar";
  