src/Directory.Build.props (7 lines of code) (raw):
<Project>
<Import Project="$([MSBuild]::GetPathOfFileAbove('Directory.Build.props', '$(MSBuildThisFileDirectory)../'))" />
<PropertyGroup>
<IsPackable>true</IsPackable>
<PackageOutputPath>$(RepoRoot)nupkg</PackageOutputPath>
</PropertyGroup>
</Project>