diff --git a/src/SourceBuild/tarball/content/repos/Directory.Build.props b/src/SourceBuild/tarball/content/repos/Directory.Build.props
index 100183a09811..c178de4eca9d 100644
--- a/src/SourceBuild/tarball/content/repos/Directory.Build.props
+++ b/src/SourceBuild/tarball/content/repos/Directory.Build.props
@@ -98,6 +98,9 @@
     <EnvironmentVariables Include="DeterministicSourcePaths=false" Condition="'$(DeterministicBuildOptOut)' == 'true'" />
 
     <EnvironmentVariables Include="SourceRoot=$(ProjectDirectory)" />
+
+    <!-- https://github.com/dotnet/source-build/issues/3081 -->
+    <EnvironmentVariables Include="CheckEolTargetFramework=false" />
   </ItemGroup>
 
   <ItemGroup Condition="'$(EnableExtraDebugging)' == 'true'">
diff --git a/src/SourceBuild/tarball/content/repos/fsharp.proj b/src/SourceBuild/tarball/content/repos/fsharp.proj
index 4d00be9adb4a..a03a69fc5032 100644
--- a/src/SourceBuild/tarball/content/repos/fsharp.proj
+++ b/src/SourceBuild/tarball/content/repos/fsharp.proj
@@ -27,7 +27,6 @@
 
   <ItemGroup>
     <UseSourceBuiltSdkOverride Include="@(ArcadeSdkOverride)" />
-    <EnvironmentVariables Include="CheckEolTargetFramework=false" />
   </ItemGroup>
 
   <Import Project="Sdk.targets" Sdk="Microsoft.NET.Sdk" />
diff --git a/src/SourceBuild/tarball/content/repos/xliff-tasks.proj b/src/SourceBuild/tarball/content/repos/xliff-tasks.proj
index 7964fabdce9d..a5881adb4538 100644
--- a/src/SourceBuild/tarball/content/repos/xliff-tasks.proj
+++ b/src/SourceBuild/tarball/content/repos/xliff-tasks.proj
@@ -3,8 +3,6 @@
 
   <PropertyGroup>
     <BuildCommandArgs>$(StandardSourceBuildArgs)</BuildCommandArgs>
-    <!-- Repo has netcoreapp2.1 projects: https://github.com/dotnet/xliff-tasks/issues/508 -->
-    <BuildCommandArgs>$(BuildCommandArgs) /p:CheckEolTargetFramework=false</BuildCommandArgs>
     <BuildCommand>$(StandardSourceBuildCommand) $(BuildCommandArgs)</BuildCommand>
 
     <RepoApiImplemented>false</RepoApiImplemented>