anchor.diff:    version = "2.7";
   
     src = fetchurl {
  -    url = "mirror://sourceforge/project/${finalAttrs.pname}/${finalAttrs.pname}/${finalAttrs.version}/${finalAttrs.pname}-${finalAttrs.version}.tar.gz";
  +    url = "mirror://sourceforge/project/bochs/bochs/${finalAttrs.version}/bochs-${finalAttrs.version}.tar.gz";
       hash = "sha256-oBCrG/3HKsWgjS4kEs1HHA/r1mrx2TSbwNeWh53lsXo=";
     };
   
  
positive.code:     "--enable-voodoo"
      "--enable-x86-64"
      "--enable-x86-debugger"
    ] ++ lib.optionals (!stdenv.isDarwin) [
      "--enable-e1000"
      "--enable-es1370"
  
negative.code:     "--enable-plugins"
      "--enable-pnic"
      "--enable-sb16"
    ];
  
    enableParallelBuilding = true;
  