Stage 2 runtime failure looking for portable packages instead of RID specific packages

[MichaelSimons]

The internal CI Stage 2 leg is failing during the runtime build looking for portable packages instead of RID specific packages

    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj : error NU1101: Unable to find package Microsoft.NETCore.App.Runtime.linux-x64. No packages exist with this id in source(s): prebuilt, previously-source-built, reference-packages, source-built [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/crossgen2/crossgen2.csproj : error NU1101: Unable to find package Microsoft.NETCore.App.Runtime.linux-x64. No packages exist with this id in source(s): prebuilt, previously-source-built, reference-packages, source-built [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj : error NU1101: Unable to find package Microsoft.NETCore.App.Crossgen2.linux-x64. No packages exist with this id in source(s): prebuilt, previously-source-built, reference-packages, source-built [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/crossgen2/crossgen2.csproj : error NU1101: Unable to find package Microsoft.NETCore.App.Crossgen2.linux-x64. No packages exist with this id in source(s): prebuilt, previously-source-built, reference-packages, source-built [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj : error NU1102: Unable to find package Microsoft.NETCore.App.Host.linux-x64 with version (= 8.0.0-preview.4.23224.7) [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj : error NU1102:   - Found 2 version(s) in prebuilt [ Nearest version: 7.0.5 ] [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj : error NU1102:   - Found 0 version(s) in source-built [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj : error NU1102:   - Found 0 version(s) in previously-source-built [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/ILCompiler/ILCompiler.csproj : error NU1102:   - Found 0 version(s) in reference-packages [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/crossgen2/crossgen2.csproj : error NU1102: Unable to find package Microsoft.NETCore.App.Host.linux-x64 with version (= 8.0.0-preview.4.23224.7) [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/crossgen2/crossgen2.csproj : error NU1102:   - Found 2 version(s) in prebuilt [ Nearest version: 7.0.5 ] [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/crossgen2/crossgen2.csproj : error NU1102:   - Found 0 version(s) in source-built [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/crossgen2/crossgen2.csproj : error NU1102:   - Found 0 version(s) in previously-source-built [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]
    /vmr/src/runtime/artifacts/source-build/self/src/src/coreclr/tools/aot/crossgen2/crossgen2.csproj : error NU1102:   - Found 0 version(s) in reference-packages [/vmr/src/runtime/artifacts/source-build/self/src/Build.proj]

[MichaelSimons]

Looks like this was caused by dotnet/runtime#82832 (comment)