Cannot build Skia libraries, error starting python3?

[BradChase2011]

This is on VS2022 Windows x64, using the latest repository. Normal SkiaSharp builds fine but I have modifications I put into the native Skia code (on my older repository, this is exactly as downloaded). I have an older version of SkiaSharp that I have built over and over but the new one doesnt seem to build.

I get this error every time:
PS C:\Development\Examples\SkiaSharpNew> dotnet cake --target=libs
The assembly 'Cake.Xamarin, Version=3.1.0.0, Culture=neutral, PublicKeyToken=null'
is referencing an older version of Cake.Core (0.33.0).
For best compatibility it should target Cake.Core version 2.0.0.
The assembly 'Cake.XCode, Version=5.0.0.0, Culture=neutral, PublicKeyToken=null'
is referencing an older version of Cake.Core (1.0.0).
For best compatibility it should target Cake.Core version 2.0.0.
The assembly 'Cake.FileHelpers, Version=4.0.1.0, Culture=neutral, PublicKeyToken=null'
is referencing an older version of Cake.Core (1.0.0).
For best compatibility it should target Cake.Core version 2.0.0.
The assembly 'Cake.Json, Version=6.0.1.0, Culture=neutral, PublicKeyToken=null'
is referencing an older version of Cake.Core (1.0.0).
For best compatibility it should target Cake.Core version 2.0.0.
Arguments:
target libs
Source Control:
PREVIEW_LABEL preview
FEATURE_NAME
BUILD_NUMBER 0
GIT_SHA
GIT_BRANCH_NAME
GIT_URL

========================================
externals-android

Arguments:
target Default

========================================
git-sync-deps

An error occurred when executing task 'git-sync-deps'.
Error: An error occurred trying to start process '"python3"' with working directory 'C:/Development/Examples/SkiaSharpNew/externals/skia'. The system cannot find the file specified.
An error occurred when executing task 'externals-android'.
Error: .NET CLI: Process returned an error (exit code 1).

The same error occurs when doing just the windows build as well. Am I missing something or is there a step somewhere that hasnt been explained?

Thanks much!