The biggest issue will probably be to find some at least somewhat sane way to download the required #NuGet packages during #port fetch phase, so they can be used "offline" during build later. Of course if ever possible with correct checksumming in distinfo.
This is always the same annoying crap with all these languages and frameworks inventing their own package management. Sucks.
For #NuGet, I tought the commandline client could maybe help with the task. Well if anyone can tell me how to even build that thing ... I guess I'll give up and look for other ideas. Should be possible to somehow automate the process to get the correct uris for package downloads? And then maybe patch the build files of #PowerShell to exclusively use a local directory as the "package source" ... we will see.