error Command failed with exit code 1

kibana version：7.12.1
when run ： yarn kbn bootstrap 。show error ：

succ 4 bootstrap builds are cached
info [@kbn/babel-code-parser] running [kbn:bootstrap] script
info [@kbn/std] running [kbn:bootstrap] script
info [@kbn/utils] running [kbn:bootstrap] script
ERROR [bootstrap] failed:
ERROR Error: Command failed with exit code 1: C:\Users\v-wangjie\AppData\Roaming\npm\node_modules\yarn\bin\yarn.js run kbn:bootstrap
'rm' �����ڲ����ⲿ���Ҳ���ǿ����еij���
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error Command failed with exit code 1.
error Command failed with exit code 1.
$ yarn build
$ rm -rf target && ../../node_modules/.bin/tsc
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.
at makeError (D:\work\webProjects\newKibana\kibana\packages\kbn-pm\dist\index.js:34983:11)
at handlePromise (D:\work\webProjects\newKibana\kibana\packages\kbn-pm\dist\index.js:33917:26)
at processTicksAndRejections (internal/process/task_queues.js:93:5)
at async D:\work\webProjects\newKibana\kibana\packages\kbn-pm\dist\index.js:8982:9
at async scheduleItem (D:\work\webProjects\newKibana\kibana\packages\kbn-pm\dist\index.js:22633:9)
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Start by reproducing the Windows failure from the reported `yarn kbn bootstrap` and `yarn build` commands, focusing on `packages/kbn-pm/dist/index.js` and the `kbn:bootstrap` entry point. Trace the package build invocation around `rm -rf target` and verify that bootstrap completes successfully on Windows without the reported exit-code error.

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