node-pre-gyp WARN Using request for node-pre-gyp https download
  CXX(target) Release/obj.target/grpc/deps/grpc/src/core/lib/surface/init.o
  CXX(target) Release/obj.target/grpc/deps/grpc/src/core/lib/avl/avl.o
  CXX(target) Release/obj.target/grpc/deps/grpc/src/core/lib/backoff/backoff.o
  CXX(target) Release/obj.target/grpc/deps/grpc/src/core/lib/channel/channel_args.o
  CXX(target) Release/obj.target/grpc/deps/grpc/src/core/lib/channel/channel_stack.o
error: unknown warning option '-Wno-maybe-uninitialized'; did you mean '-Wno-uninitialized'? [-Werror,-Wunknown-warning-option]
error: unknown warning option '-Wno-maybe-uninitialized'; did you mean '-Wno-uninitialized'? [-Werror,-Wunknown-warning-option]
make: *** [Release/obj.target/grpc/deps/grpc/src/core/lib/backoff/backoff.o] Error 1
make: *** Waiting for unfinished jobs....
make: *** [Release/obj.target/grpc/deps/grpc/src/core/lib/avl/avl.o] Error 1
error: unknown warning option '-Wno-maybe-uninitialized'; did you mean '-Wno-uninitialized'? [-Werror,-Wunknown-warning-option]
make: *** [Release/obj.target/grpc/deps/grpc/src/core/lib/surface/init.o] Error 1
error: unknown warning option '-Wno-maybe-uninitialized'; did you mean '-Wno-uninitialized'? [-Werror,-Wunknown-warning-option]
make: *** [Release/obj.target/grpc/deps/grpc/src/core/lib/channel/channel_stack.o] Error 1
error: unknown warning option '-Wno-maybe-uninitialized'; did you mean '-Wno-uninitialized'? [-Werror,-Wunknown-warning-option]
make: *** [Release/obj.target/grpc/deps/grpc/src/core/lib/channel/channel_args.o] Error 1
gyp ERR! build error
gyp ERR! stack Error: `make` failed with exit code: 2
gyp ERR! stack     at ChildProcess.onExit (/Users/kbuilder/.nvm/versions/node/v6.17.1/lib/node_modules/npm/node_modules/node-gyp/lib/build.js:276:23)
gyp ERR! stack     at emitTwo (events.js:106:13)
gyp ERR! stack     at ChildProcess.emit (events.js:191:7)
gyp ERR! stack     at Process.ChildProcess._handle.onexit (internal/child_process.js:219:12)
gyp ERR! System Darwin 17.7.0
gyp ERR! command "/Users/kbuilder/.nvm/versions/node/v6.17.1/bin/node" "/Users/kbuilder/.nvm/versions/node/v6.17.1/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "build" "--fallback-to-build" "--library=static_library" "--module=/Volumes/BuildData/tmpfs/src/github/grpc/grpc-node/packages/grpc-native-core/src/node/extension_binary/node-v48-darwin-x64-unknown/grpc_node.node" "--module_name=grpc_node" "--module_path=/Volumes/BuildData/tmpfs/src/github/grpc/grpc-node/packages/grpc-native-core/src/node/extension_binary/node-v48-darwin-x64-unknown" "--napi_version=3" "--node_abi_napi=napi" "--napi_build_version=0" "--node_napi_label=node-v48"