The post-processor vagrant is unknown by Packer, and is likely part of a plugin that is not installed

I am seeing following error when I tried to run packer build .hcl file

The post-processor vagrant is unknown by Packer, and is likely part of a plugin
that is not installed.
You may find the needed plugin along with installation instructions documented
on the Packer integrations page.

Please suggest what exactly needs to be installed

packer {
  required_plugins {
    azure = {
      version = ">= 1.0.0"
      source = "github.com/hashicorp/azure"
    }
  }
} 
  
source "azure-arm" "example" {
  # Using Azure CLI for authentication
  use_azure_cli_auth = true 
  location = "eastus2"
  os_type = "windows"


  shared_image_gallery {
    resource_group       = "cg"   
    gallery_name         = "gallery1"
    image_name           = "webserver"
    image_version        = "1.0.0"
    subscription = "93048f2d-2d0f-44cc-b12c-4df25a3c5ff5"
  }
    
  shared_image_gallery_destination {
    resource_group       = "cg"   
    gallery_name         = "gallery1"
    image_name           = "webserver"
    image_version        = "1.0.1"
    replication_regions  = ["eastus"]
    storage_account_type = "Standard_LRS"
  }
}
build {
  sources = [
  "source.azure-arm.example"
  ]


  provisioner "powershell" {
    inline = [
    "Remove-WindowsFeature Web-Server",
    "while ((Get-Service RdAgent).Status -ne 'Running') { Start-Sleep -s 5 }",
    "while ((Get-Service WindowsAzureGuestAgent).Status -ne 'Running') { Start-Sleep -s 5 }",
    "& $env:SystemRoot\\System32\\Sysprep\\Sysprep.exe /oobe /generalize /quiet /quit",
    "while($true) { $imageState = Get-ItemProperty HKLM:\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Setup\\State | Select ImageState; if($imageState.ImageState -ne 'IMAGE_STATE_GENERALIZE_RESEAL_TO_OOBE') { Write-Output $imageState.ImageState; Start-Sleep -s 10  } else { break } }"
    ]
  }

post-processor "vagrant" {}

post-processor "compress" {}

}