diff --git a/eng/Version.Details.xml b/eng/Version.Details.xml
index a9f792bc0685..638a51fa1bb4 100644
--- a/eng/Version.Details.xml
+++ b/eng/Version.Details.xml
@@ -189,9 +189,9 @@
       <Uri>https://github.com/dotnet/runtime</Uri>
       <Sha>dbb335c6ba14b38400b2d8c3a5876698021ec089</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="9.0.0-alpha.1.24059.3">
+    <Dependency Name="Microsoft.SourceBuild.Intermediate.source-build-externals" Version="9.0.0-alpha.1.24066.1">
       <Uri>https://github.com/dotnet/source-build-externals</Uri>
-      <Sha>6513a2c0cd7be2706742181af63d717a90cec5be</Sha>
+      <Sha>6fc8c1ac45220a4d9b4c59bf2ff187dafcb1da3f</Sha>
       <SourceBuild RepoName="source-build-externals" ManagedOnly="true" />
     </Dependency>
     <Dependency Name="System.Configuration.ConfigurationManager" Version="9.0.0-alpha.1.24066.33">
diff --git a/eng/Versions.props b/eng/Versions.props
index 3707e8af1af3..bf3ebe8fed7a 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -164,7 +164,7 @@
     <MicrosoftDotNetBuildTasksTemplatingVersion>9.0.0-beta.24062.5</MicrosoftDotNetBuildTasksTemplatingVersion>
     <MicrosoftDotNetRemoteExecutorVersion>9.0.0-beta.24062.5</MicrosoftDotNetRemoteExecutorVersion>
     <!-- Packages from dotnet/source-build-externals -->
-    <MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>9.0.0-alpha.1.24059.3</MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>
+    <MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>9.0.0-alpha.1.24066.1</MicrosoftSourceBuildIntermediatesourcebuildexternalsVersion>
     <!-- Packages from dotnet/source-build-reference-packages -->
     <MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>9.0.0-alpha.1.24059.3</MicrosoftSourceBuildIntermediatesourcebuildreferencepackagesVersion>
     <!-- Packages from dotnet/symreader -->