diff --git a/scripts/dotnet-cli-build/CompileTargets.cs b/scripts/dotnet-cli-build/CompileTargets.cs
index 1fc300ce0..e7e29c510 100644
--- a/scripts/dotnet-cli-build/CompileTargets.cs
+++ b/scripts/dotnet-cli-build/CompileTargets.cs
@@ -342,7 +342,7 @@ namespace Microsoft.DotNet.Cli.Build
             foreach (var assemblyToCrossgen in AssembliesToCrossGen)
             {
                 c.Info($"Crossgenning {assemblyToCrossgen}");
-                ExecInSilent(outputDir, crossgen, "-nologo", "-platform_assemblies_paths", outputDir, assemblyToCrossgen);
+                ExecInSilent(outputDir, crossgen, "-FragileNonVersionable", "-nologo", "-platform_assemblies_paths", outputDir, assemblyToCrossgen);
             }
 
             c.Info("Crossgen complete");
diff --git a/scripts/run-build.sh b/scripts/run-build.sh
index 076abfdb2..c6f8f0961 100755
--- a/scripts/run-build.sh
+++ b/scripts/run-build.sh
@@ -85,7 +85,7 @@ done < "$DIR/../branchinfo.txt"
 
 # Ensure the latest stage0 is installed
 export CHANNEL=$RELEASE_SUFFIX
-$DIR/obtain/install.sh --channel $CHANNEL
+$DIR/obtain/install.sh --channel $CHANNEL --version 1.0.0.001665
 
 # Put stage 0 on the PATH (for this shell only)
 PATH="$DOTNET_INSTALL_DIR/bin:$PATH"