bazel: Bazel installation failed "package io.grpc.stub does not exist"

Description of the problem / feature request / question:

I try to compile bazel using MSYS2 64-bit While executing command “bash compile.sh” in my bazel directory, it always fails to compile because of “error: package io.grpc.stub does not exist”. I set my enviroment according to requirements (https://bazel.build/versions/master/docs/windows.html#requirements). Also, I checked “/third_party/grpc” package in bazel folder. There are all classes, which need to compile bazel. Log is attached. Any idea of what it might be?

Environment info

• Operating System: Windows 7 Ultimate SP1 64-bit
• Bazel version (output of bazel info release): 0.4.3 java version “1.8.0_121” Java™ SE Runtime Environment (build 1.8.0_121-b13) Java HotSpot™ 64-Bit Server VM (build 25.121-b13, mixed mode)

Have you found anything relevant by searching the web?

No

Anything else, information or logs or outputs that would be helpful?

log.txt