dotnet add package Newtonsoft.Json --source http://psndlnet If you could provide more context or clarify the package ecosystem you're working with, I could offer more tailored advice.
pip install package_name However, if you're trying to install from a custom repository, you might need to specify the repository URL: http psndlnet packages install
pip install --extra-index-url http://psndlnet/ package_name Replace package_name with the actual name of the package you want to install. If you're working with .NET and NuGet packages, the command to install a package might look something like this: dotnet add package Newtonsoft