anchor.diff:    openjdk_headless = openjdk8_headless;
   
     jdk8 = openjdk8;
  +  jdk8_headless = openjdk8_headless;
     jre8 = openjdk8.jre;
     jre8_headless = openjdk8_headless.jre;
   
  
positive.code:   bazel_1 = callPackage ../development/tools/build-managers/bazel/bazel_1 {
      inherit (darwin) cctools;
      inherit (darwin.apple_sdk.frameworks) CoreFoundation CoreServices Foundation;
      buildJdk = jdk8;
      buildJdkName = "jdk8";
      runJdk = jdk11_headless;
      stdenv = if stdenv.cc.isClang then llvmPackages_6.stdenv else stdenv;
  
negative.code:   bazel_0_29 = callPackage ../development/tools/build-managers/bazel/bazel_0_29 {
      inherit (darwin) cctools;
      inherit (darwin.apple_sdk.frameworks) CoreFoundation CoreServices Foundation;
      buildJdk = jdk8_headless;
      buildJdkName = "jdk8";
      runJdk = jdk11_headless;
      stdenv = if stdenv.cc.isClang then llvmPackages_6.stdenv else stdenv;
  