anchor.diff:  
     src = fetchurl {
       url= "https://download.qemu.org/qemu-${version}.tar.xz";
  -    sha256 = "1g0pvx4qbirpcn9mni704y03n3lvkmw2c0rbcwvydyr8ns4xh66b";
  +    sha256 = "1f9hz8rf12jm8baa7kda34yl4hyl0xh0c4ap03krfjx23i3img47";
     };
   
     nativeBuildInputs = [ python python.pkgs.sphinx pkg-config flex bison meson ninja ]
  
positive.code:     homepage = "http://www.qemu.org/";
      description = "A generic and open source machine emulator and virtualizer";
      license = licenses.gpl2Plus;
      maintainers = with maintainers; [ eelco ];
      platforms = platforms.linux ++ platforms.darwin;
    };
  }
  
negative.code:     patchShebangs .
      # avoid conflicts with libc++ include for <version>
      mv VERSION QEMU_VERSION
      substituteInPlace configure \
        --replace '$source_path/VERSION' '$source_path/QEMU_VERSION'
      substituteInPlace meson.build \
        --replace "'VERSION'" "'QEMU_VERSION'"
    '' + optionalString stdenv.hostPlatform.isMusl ''
  