anchor.diff:    };
   
     jdk = stdenv.mkDerivation rec {
  -    pname = "zulu16.28.11-ca-jdk";
  -    version = "16.0.0";
  +    pname = "zulu${dist.zuluVersion}-ca-jdk";
  +    version = dist.jdkVersion;
   
       src = fetchurl {
  -      url = "https://cdn.azul.com/zulu/bin/${pname}${version}-macosx_x64.tar.gz";
  -      sha256 = "6d47ef22dc56ce1f5a102ed39e21d9a97320f0bb786818e2c686393109d79bc5";
  +      url = "https://cdn.azul.com/zulu/bin/zulu${dist.zuluVersion}-ca-jdk${dist.jdkVersion}-macosx_${dist.arch}.tar.gz";
  +      inherit (dist) sha256;
         curlOpts = "-H Referer:https://www.azul.com/downloads/zulu/";
       };
   
       nativeBuildInputs = [ unzip ];
  -    buildInputs = [ freetype ];
   
       installPhase = ''
         mkdir -p $out
  
positive.code:       mkdir -p $out/nix-support
        printWords ${setJavaClassPath} > $out/nix-support/propagated-build-inputs
  
        install_name_tool -change /usr/X11/lib/libfreetype.6.dylib ${freetype}/lib/libfreetype.6.dylib $out/lib/libfontmanager.dylib
  
        # Set JAVA_HOME automatically.
        cat <<EOF >> $out/nix-support/setup-hook
        if [ -z "\''${JAVA_HOME-}" ]; then export JAVA_HOME=$out; fi
  
negative.code: { lib, stdenv, fetchurl, unzip, setJavaClassPath }:
  let
    # Details from https://www.azul.com/downloads/?version=java-16-sts&os=macos&package=jdk
    # Note that the latest build may differ by platform
    dist = {
      x86_64-darwin = {
        arch = "x64";
        zuluVersion = "16.30.15";
        jdkVersion = "16.0.1";
        sha256 = "1jihn125dmxr9y5h9jq89zywm3z6rbwv5q7msfzsf2wzrr13jh0z";
      };
  
      aarch64-darwin = {
        arch = "aarch64";
        zuluVersion = "16.30.19";
        jdkVersion = "16.0.1";
        sha256 = "1i0bcjx3acb5dhslf6cabdcnd6mrz9728vxw9hb4al5y3f5fll4w";
      };
    }."${stdenv.hostPlatform.system}";
  
    jce-policies = fetchurl {
      # Ugh, unversioned URLs... I hope this doesn't change often enough to cause pain before we move to a Darwin source build of OpenJDK!
      url    = "http://cdn.azul.com/zcek/bin/ZuluJCEPolicies.zip";
  