nuget: Source generator doesn't generate sources for tools required to build

[yesseruser]

flatpak-builder version

1.4.4

Linux distribution and version

Ubuntu 24.04.1

Affected flatpak-builder tool

dotnet/flatpak-dotnet-generator.py

flatpak-builder tool cli args

No response

Source repository URL

https://github.com/yesser-studios/Pong

Flatpak-builder manifest URL

https://github.com/yesseruser/flathub

Description

When running the flatpak-dotnet-generator.py and then building the flatpak while using the generated sources, dotnet tool restore --add-source dotnet-sources still fails.