What happened?
It is not possible anymore to build using instructions provided at https://github.com/microsoft/azure-pipelines-agent/blob/master/docs/contribute.md. Looks like https://pkgs.dev.azure.com/mseng/PipelineTools/_packaging/nugetvssprivate/nuget/v3/index.json feed is not public anymore.
Versions
Latest source code.
Environment type (Please select at least one enviroment where you face this issue)
Azure DevOps Server type
dev.azure.com (formerly visualstudio.com)
Azure DevOps Server Version (if applicable)
No response
Operation system
No response
Version controll system
No response
Relevant log output