我有以下powershell脚本，通过packer实用程序运行，同时创建aws ami映像。此脚本下载并安装aws cli，然后立即尝试使用它。安装过程将更新windows PATH环境变量，但我认为它不会立即在同一脚本中可用。所以我设置的位置，在使用它之前安装cli。

$SETUP_DIR = "C:\Setup"

New-Item -Path $SETUP_DIR -ItemType Directory -Force -ErrorAction SilentlyContinue

Clear-Host
Set-Location -Path $SETUP_DIR -PassThru

# install AWS CLI
msiexec.exe /i https://awscli.amazonaws.com/AWSCLIV2.msi /quiet
Write-Host "AWS CLI installation completed."

# Set location to AWS CLI
Set-Location -Path "C:\Program Files\Amazon\AWSCLIV2" -PassThru

# Download utility from AWS S3
aws s3 cp s3://tools/utility.exe
Write-Host "Utility download completed."

# switch the location back to c:\setup
Set-Location -Path $SETUP_DIR -PassThru

但是，当脚本执行时，它会抛出错误The term 'aws' is not recognized

• aws s3 cp s3：//工具/实用程序. exe ...==〉www.example.com服务器：+~~~==〉亚马逊-ebs.windows服务器：amazon-ebs.windows未找到对象：[]，命令未找到异常==〉服务器：+完全限定的错误ID：服务器异常==〉服务器错误：亚马逊-ebs.windows服务器：==〉亚马逊-ebs.windows服务器：aws：术语"aws"无法识别为cmdlet、函数、脚本文件或可操作程序的名称。请检查==〉amazon-ebs.windows_server：请检查名称的拼写，或者如果包含路径，请验证路径是否正确，然后重试。 aws : The term 'aws' is not recognized as the name of a cmdlet, function, script file, or operable program. Check the ==> amazon-ebs.windows_server: spelling of the name, or if a path was included, verify that the path is correct and try again.