Building the projects that are going to be packaged separately so that they build for all the Tfms. The package step will then pick it up and package all the correct Tfms as well.

scripts/compile/compile-stage.ps1

@@ -35,6 +35,16 @@ $Projects = @(
     "Microsoft.Extensions.Testing.Abstractions"
 )
 
+# We need to keep the building of these projects in a separate step so that they can be signed.
+$ProjectsToPack = @(
+    "Microsoft.DotNet.Cli.Utils",
+    "Microsoft.DotNet.ProjectModel",
+    "Microsoft.DotNet.ProjectModel.Loader",
+    "Microsoft.DotNet.ProjectModel.Workspaces",
+    "Microsoft.Extensions.DependencyModel",
+    "Microsoft.Extensions.Testing.Abstractions"
+)
+
 $BinariesForCoreHost = @(
     "csi"
     "csc"
@@ -91,6 +101,15 @@ if (! (Test-Path $runtimeBinariesOutputDir)) {
 
 cp $runtimeBinariesOutputDir\* $RuntimeOutputDir -force -recurse
 
+# Build the projects that we are going to ship as nuget packages
+$ProjectsToPack | ForEach-Object {
+    dotnet build --output "$CompilationOutputDir\bin" --configuration "$Configuration" "$RepoRoot\src\$_"
+    if (!$?) {
+        Write-Host Command failed: dotnet build --native-subdirectory --output "$CompilationOutputDir\bin" --configuration "$Configuration" "$RepoRoot\src\$_"
+        exit 1
+    }
+}
+
 # Clean up bogus additional files
 $FilesToClean | ForEach-Object {
     $path = Join-Path $RuntimeOutputDir $_