Install the Android NDK as part of your PowerShell build. Xamarin Android

android-ndk.ps1

$path ='C:\Android\android-ndk'
$ndk = 'android-ndk-r11c'
$fullPath = Join-Path $path $ndk
if(!(Test-Path $fullPath)){
    New-Item $path -Force -ItemType directory
    (New-Object Net.WebClient).DownloadFile("http://dl.google.com/android/repository/$ndk-windows-x86.zip", "C:\Temp\$ndk-windows-x86.zip")
    (new-object -com shell.application).namespace("$path").CopyHere((new-object -com shell.application).namespace("C:\Temp\$ndk-windows-x86.zip").Items(),16)
    $regPath = 'HKCU:\Software\Novell\Mono for Android'
    $regKey = 'AndroidNdkDirectory'
    $regValue = $fullPath
    if(Test-Path $regPath){
        New-Item -Path $regPath -Name $regKey -Force | Out-Null
    }
    Set-ItemProperty -Path $regPath -Name $regKey -Value $regValue 
} else {
    Write-Host 'NDK Already Exists'
}