bounty将在2天后过期。回答此问题可获得+50声望奖励。AlexS希望引起更多人对此问题的关注：我相信问题出在从powershell访问GITHUB_PATH上。我检查了用户权限，我确定在访问GITHUB_PATH时登录的用户及其计算机上的管理员成员。

我有以下工作流程

name: Test set path
on:
  workflow_dispatch:
jobs:
  test-cross-aws:
    runs-on: [self-hosted, '${{ matrix.platform.os }}', x64, '${{ matrix.platform.label }}']
    #runs-on: windows-latest   
    strategy:
      matrix:
        platform: [{ os: windows, label: wix-aws-windows-test }]
    steps:
      - name: create fake batchfile
        if: always()
        run: |
           mkdir testfolder
           echo "@echo off" | Out-File -FilePath testfolder/testbatch.bat -Encoding utf8
           echo "echo SOMETHING" | Out-File -FilePath testfolder/testbatch.bat -Encoding utf8           

      - name: add path
        if: always()
        run: echo "$pwd\testfolder;" | Out-File -FilePath $env:GITHUB_PATH -Encoding utf8 -Append

      - name: run custom binary with path
        if: always()
        run: testbatch.bat

它在常规的github action windows runner上工作正常。但在基于此image构建的自托管github runner上失败。

testbatch.bat : The term 'testbatch.bat' is not recognized as the name of a cmdlet, function, script file, or operable 
program. Check the spelling of the name, or if a path was included, verify that the path is correct and try again.
At C:\actions-runner\_work\_temp\744d9b45-8f99-4db5-ba7d-b95aad4dde97.ps1:2 char:1
+ testbatch.bat
+ ~~~~~~~~~~~~~
    + CategoryInfo          : ObjectNotFound: (testbatch.bat:String) [], ParentContainsErrorRecordException
    + FullyQualifiedErrorId : CommandNotFoundException
 
Error: Process completed with exit code 1.

Github运行器版本是2.303.0 Windows我使用的是Windows 2022数据中心。