How do I specify the local folder for nuget packages?

I have custom nuget packages. I copied them into local folder /projects/nuget and have specified it in the Nuget.config in the home/.nuget folder. but the rider is unable to pick and restore packages from the local folder. This is how my Nuget.config looks

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <packageSources>
    <add key="nuget.org" value="https://api.nuget.org/v3/index.json" protocolVersion="3" />
    <add key="local" value="/projects/nugets" />
  </packageSources>
  <config>
    <add key="repositoryPath" value="/projects/nugets" />
    <add key="globalPackagesFolder" value="/home/user/.nuget/packages" />
  </config>
</configuration>