anchor.diff:      sourceRoot = "source/libflux";
       cargoSha256 = "06gh466q7qkid0vs5scic0qqlz3h81yb00nwn8nwq8ppr5z2ijyq";
       nativeBuildInputs = [ llvmPackages.libclang ];
  +    buildInputs = lib.optional stdenv.isDarwin libiconv;
       LIBCLANG_PATH = "${llvmPackages.libclang.lib}/lib";
       pkgcfg = ''
         Name: flux
  
positive.code: , mkYarnPackage
  , pkg-config
  , rustPlatform
  }:
  
  # Note for maintainers: use ./update-influxdb2.sh to update the Yarn
  
negative.code:       cp -r $NIX_BUILD_TOP/source/libflux/include/influxdata $out/include
        substitute $pkgcfgPath $out/pkgconfig/flux.pc \
          --replace /out $out
      '' + lib.optionalString stdenv.isDarwin ''
        install_name_tool -id $out/lib/libflux.dylib $out/lib/libflux.dylib
      '';
    };
  in buildGoModule {
  