diff --git a/external/Java.Interop/Directory.Build.targets b/external/Java.Interop/Directory.Build.targets
index 2da41427e38..bae15432a97 100644
--- a/external/Java.Interop/Directory.Build.targets
+++ b/external/Java.Interop/Directory.Build.targets
@@ -34,7 +34,18 @@
     <PackageReference Update="Microsoft.CSharp"                             Version="4.7.0" />
     <PackageReference Update="Microsoft.DotNet.GenAPI"                      Version="8.0.0-beta.26301.3" />
     <PackageReference Update="Microsoft.NET.Test.Sdk"                       Version="18.6.0" />
-    <PackageReference Update="Microsoft.SourceLink.GitHub"                  Version="10.0.300" />
+    <!--
+      Microsoft.SourceLink.GitHub is a build-time only package (PrivateAssets="All"), but its
+      dependency Microsoft.Build.Tasks.Git 10.0.300 pulls System.IO.Hashing 10.0.8 in as a *runtime*
+      asset. Projects that only reference System.IO.Hashing transitively (e.g. class-parse, jcw-gen,
+      generator) therefore ship a System.IO.Hashing 10.0.8 assembly, which collides in the shared
+      .NET for Android SDK pack `tools/` directory with the 10.0.9 assembly the build tasks are
+      compiled against (System.IO.Hashing bumps its AssemblyVersion every patch: 10.0.0.8 vs 10.0.0.9),
+      producing a MissingMethodException on System.IO.Hashing.Crc64.Hash at build time. These tools do
+      not use System.IO.Hashing themselves, so exclude SourceLink's runtime assets to keep the unused
+      assembly out of their output. Source linking is unaffected (it runs via SourceLink's build assets).
+    -->
+    <PackageReference Update="Microsoft.SourceLink.GitHub"                  Version="10.0.300" ExcludeAssets="runtime" />
     <PackageReference Update="Microsoft.Xml.SgmlReader"                     Version="1.8.30" />
     <PackageReference Update="Mono.CSharp"                                  Version="4.0.0.143" />
     <PackageReference Update="Mono.Linq.Expressions"                        Version="2.0.0" />