how to call PowerShell script with a GithubActions workflow?

powershell github-actions

As agreed in the comments, the solution for this issue was to specify the shell to be run in your Action file. In your case you had to change from:

    - name: Build      run: |        .\build.ps1

to:

    - name: Build      shell: pwsh      run: |        .\build.ps1

For more details about available values for shell param, refer to documentation.

CodeHunter