Build the bazel failed

[zsw20200809]

I've tried to build the bazel as mentioned in the readme , but I get the following error:bazel build :visqol -c opt
The error is as follows

ERROR: An error occurred during the fetch of repository 'local_execution_config_python':
   Traceback (most recent call last):
        File "C:/users/think/_bazel_think/d4yuvxeh/external/org_tensorflow/third_party/py/python_configure.bzl", line 212, column 22, in _create_local_python_repository
                _check_python_bin(repository_ctx, python_bin)
        File "C:/users/think/_bazel_think/d4yuvxeh/external/org_tensorflow/third_party/py/python_configure.bzl", line 143, column 52, in _check_python_bin
                result = raw_exec(repository_ctx, [get_bash_bin(repository_ctx), "-c", cmd])
        File "C:/users/think/_bazel_think/d4yuvxeh/external/org_tensorflow/third_party/remote_config/common.bzl", line 88, column 26, in get_bash_bin
                bash_bin_path = which(repository_ctx, "bash")
        File "C:/users/think/_bazel_think/d4yuvxeh/external/org_tensorflow/third_party/remote_config/common.bzl", line 27, column 22, in which
                out = execute(
        File "C:/users/think/_bazel_think/d4yuvxeh/external/org_tensorflow/third_party/remote_config/common.bzl", line 230, column 13, in execute
                fail(
Error in fail: Repository command failed