anchor.diff:  
         # Fixup scripts that generate scripts. Not fixed up by patchShebangs below.
         substituteInPlace scripts/bootstrap/compile.sh \
  -          --replace /bin/sh ${customBash}/bin/bash
  +          --replace /bin/bash ${customBash}/bin/bash
   
         # add nix environment vars to .bazelrc
         cat >> .bazelrc <<EOF
  
positive.code:       # https://github.com/NixOS/nixpkgs/pull/41589
        export NIX_CFLAGS_COMPILE="$NIX_CFLAGS_COMPILE -isystem ${libcxx}/include/c++/v1"
  
        # 10.10 apple_sdk Foundation doesn't have type arguments on classes
        # Remove this when we update apple_sdk
        sed -i -e 's/<.*\*>//g' tools/osx/xcode_locator.m
  
        # don't use system installed Xcode to run clang, use Nix clang instead
        sed -i -e "s;/usr/bin/xcrun clang;${stdenv.cc}/bin/clang $NIX_CFLAGS_COMPILE $NIX_LDFLAGS -framework CoreFoundation;g" \
          scripts/bootstrap/compile.sh \
          src/tools/xcode/realpath/BUILD \
          src/tools/xcode/stdredirect/BUILD \
          tools/osx/BUILD
  
        # clang installed from Xcode has a compatibility wrapper that forwards
        # invocations of gcc to clang, but vanilla clang doesn't
  
negative.code: 
  let
    srcDeps = [
      # From: $REPO_ROOT/WORKSPACE
      (fetchurl {
        url = "https://github.com/google/desugar_jdk_libs/archive/915f566d1dc23bc5a8975320cd2ff71be108eb9c.zip";
        sha256 = "0b926df7yxyyyiwm9cmdijy6kplf0sghm23sf163zh8wrk87wfi7";
      })
      (fetchurl {
          url = "https://mirror.bazel.build/github.com/bazelbuild/skydoc/archive/2d9566b21fbe405acf5f7bf77eda30df72a4744c.tar.gz";
          sha256 = "4a1318fed4831697b83ce879b3ab70ae09592b167e5bda8edaff45132d1c3b3f";
      })
      (fetchurl {
          url = "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/archive/f83cb8dd6f5658bc574ccd873e25197055265d1c.tar.gz";
          sha256 = "ba5d15ca230efca96320085d8e4d58da826d1f81b444ef8afccd8b23e0799b52";
      })
      (fetchurl {
        url = "https://mirror.bazel.build/github.com/bazelbuild/rules_sass/archive/8ccf4f1c351928b55d5dddf3672e3667f6978d60.tar.gz";
        sha256 = "d868ce50d592ef4aad7dec4dd32ae68d2151261913450fac8390b3fd474bb898";
      })
       (fetchurl {
           url = "https://mirror.bazel.build/bazel_java_tools/releases/javac10/v3.1/java_tools_javac10_linux-v3.1.zip";
           sha256 = "a0cd51f9db1bf05a722ff7f5c60a07fa1c7d27428fff0815c342d32aa6c53576";
       })
      (fetchurl {
          url = "https://mirror.bazel.build/bazel_java_tools/releases/javac10/v3.1/java_tools_javac10_darwin-v3.1.zip";
          sha256 = "c646aad8808b8ec5844d6a80a1287fc8e13203375fe40d6af4819eff48b9bbaf";
      })
      (fetchurl {
          url = "https://mirror.bazel.build/bazel_coverage_output_generator/releases/coverage_output_generator-v1.0.zip";
          sha256 = "cc470e529fafb6165b5be3929ff2d99b38429b386ac100878687416603a67889";
      })
      (fetchurl {
          url = "https://github.com/bazelbuild/rules_nodejs/archive/0.16.2.zip";
          sha256 = "9b72bb0aea72d7cbcfc82a01b1e25bf3d85f791e790ddec16c65e2d906382ee0";
      })
      (fetchurl {
          url = "https://mirror.bazel.build/bazel_android_tools/android_tools_pkg-0.2.tar.gz";
          sha256 = "04f85f2dd049e87805511e3babc5cea3f5e72332b1627e34f3a5461cc38e815f";
      })
    ];
  
  