anchor.diff:    inherit (lib)
       replaceChars;
   
  -  version = "2018-06-29";
  +  version = "2019-02-15";
     version' = replaceChars ["-"] [""] version;
   in
   stdenv.mkDerivation rec {
  
positive.code: 
    src = fetchurl {
      url = "https://acpica.org/sites/acpica/files/acpica-unix-${version'}.tar.gz";
      multihash = "QmYVtbFWVmZxFXTM3ZgQy7xH6fKtUDPx8ht6KJ7uyLYY63";
      sha256 = "70d11f3f2adbdc64a5b33753e1889918af811ec8050722fbee0fdfc3bfd29a4f";
    };
  
    nativeBuildInputs = [
  
negative.code:     install generate/unix/bin*/iasl $out/bin
    '';
  
    passthru = {
      srcVerification = fetchurl {
        failEarly = true;
        inherit (src)
          urls
          outputHash
          outputHashAlgo;
        fullOpts = { };
      };
    };
  
    meta = with lib; {
      description = "Intel ACPI Compiler";
      homepage = http://www.acpica.org/;
  