diff --git a/eng/Versions.props b/eng/Versions.props
index 17cfcdfe7b..74c9f34b9b 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -47,7 +47,8 @@
     <MicrosoftDiagnosticsRuntimeVersion>2.1.330801</MicrosoftDiagnosticsRuntimeVersion>
     <MicrosoftDiaSymReaderNativePackageVersion>16.9.0-beta1.21055.5</MicrosoftDiaSymReaderNativePackageVersion>
     <MicrosoftDiagnosticsTracingTraceEventVersion>2.0.64</MicrosoftDiagnosticsTracingTraceEventVersion>
-    <MicrosoftExtensionsLoggingVersion>2.1.1</MicrosoftExtensionsLoggingVersion>
+    <!-- Use pinned version to avoid picking up latest (which doesn't support netcoreapp3.1) during source-build -->
+    <MicrosoftExtensionsLoggingPinnedVersion>2.1.1</MicrosoftExtensionsLoggingPinnedVersion>
     <!-- Need version that understands UseAppFilters sentinel. -->
     <MicrosoftExtensionsLoggingEventSourceVersion>5.0.1</MicrosoftExtensionsLoggingEventSourceVersion>
     <SystemCommandLineVersion>2.0.0-beta1.20468.1</SystemCommandLineVersion>
diff --git a/src/Microsoft.Diagnostics.Monitoring.EventPipe/Microsoft.Diagnostics.Monitoring.EventPipe.csproj b/src/Microsoft.Diagnostics.Monitoring.EventPipe/Microsoft.Diagnostics.Monitoring.EventPipe.csproj
index 733d18da1e..db90173d71 100644
--- a/src/Microsoft.Diagnostics.Monitoring.EventPipe/Microsoft.Diagnostics.Monitoring.EventPipe.csproj
+++ b/src/Microsoft.Diagnostics.Monitoring.EventPipe/Microsoft.Diagnostics.Monitoring.EventPipe.csproj
@@ -29,7 +29,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent" Version="$(MicrosoftDiagnosticsTracingTraceEventVersion)" />
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="$(MicrosoftBclAsyncInterfacesVersion)" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="$(MicrosoftExtensionsLoggingVersion)" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="$(MicrosoftExtensionsLoggingPinnedVersion)" />
     <PackageReference Include="System.ComponentModel.Annotations" Version="$(SystemComponentModelAnnotationsVersion)" />
     <PackageReference Include="System.Text.Encodings.Web" Version="$(SystemTextEncodingsWebVersion)" />
     <PackageReference Include="System.Text.Json" Version="$(SystemTextJsonVersion)" />
diff --git a/src/Microsoft.Diagnostics.NETCore.Client/Microsoft.Diagnostics.NETCore.Client.csproj b/src/Microsoft.Diagnostics.NETCore.Client/Microsoft.Diagnostics.NETCore.Client.csproj
index 929f82d0fa..5cb2d582c2 100644
--- a/src/Microsoft.Diagnostics.NETCore.Client/Microsoft.Diagnostics.NETCore.Client.csproj
+++ b/src/Microsoft.Diagnostics.NETCore.Client/Microsoft.Diagnostics.NETCore.Client.csproj
@@ -20,7 +20,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.Bcl.AsyncInterfaces" Version="$(MicrosoftBclAsyncInterfacesVersion)" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="$(MicrosoftExtensionsLoggingVersion)" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="$(MicrosoftExtensionsLoggingPinnedVersion)" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/src/Tools/dotnet-dsrouter/dotnet-dsrouter.csproj b/src/Tools/dotnet-dsrouter/dotnet-dsrouter.csproj
index 73fd6f82e3..3afa713272 100644
--- a/src/Tools/dotnet-dsrouter/dotnet-dsrouter.csproj
+++ b/src/Tools/dotnet-dsrouter/dotnet-dsrouter.csproj
@@ -22,8 +22,8 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.Diagnostics.Tracing.TraceEvent" Version="$(MicrosoftDiagnosticsTracingTraceEventVersion)" GeneratePathProperty="true" />
     <PackageReference Include="System.CommandLine" Version="$(SystemCommandLineVersion)" />
-    <PackageReference Include="Microsoft.Extensions.Logging" Version="$(MicrosoftExtensionsLoggingVersion)" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="$(MicrosoftExtensionsLoggingVersion)" />
+    <PackageReference Include="Microsoft.Extensions.Logging" Version="$(MicrosoftExtensionsLoggingPinnedVersion)" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="$(MicrosoftExtensionsLoggingPinnedVersion)" />
   </ItemGroup>
 
 </Project>