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