anchor.diff:        platformio
       ]);
   
  +  src = fetchFromGitHub {
  +    owner = "platformio";
  +    repo = "platformio-core";
  +    rev = "v4.3.4";
  +    sha256 = "0vf2j79319ypr4yrdmx84853igkb188sjfvlxgw06rlsvsm3kacq";
  +  };
  +
  +
   in buildFHSUserEnv {
     name = "platformio";
   
  
positive.code:   };
  
    extraInstallCommands = ''
      ln -s $out/bin/platformio $out/bin/pio
    '';
  
    runScript = "platformio";
  
negative.code: { lib, buildFHSUserEnv, fetchFromGitHub }:
  
  let
    pio-pkgs = pkgs:
  