diff --git a/src/BuildAfterTargetingPack/BuildAfterTargetingPack.csproj b/src/BuildAfterTargetingPack/BuildAfterTargetingPack.csproj
index bbc1d339174d..49a8a3b6431e 100644
--- a/src/BuildAfterTargetingPack/BuildAfterTargetingPack.csproj
+++ b/src/BuildAfterTargetingPack/BuildAfterTargetingPack.csproj
@@ -39,9 +39,10 @@
   </ItemGroup>
 
   <!-- Cannot build in source-build because that does not create an App.Ref layout. -->
+  <!-- Only build on win-x64 -->
   <Target Name="BuildDelayedProjects"
       BeforeTargets="Build"
-      Condition=" '$(DotNetBuildSourceOnly)' != 'true' "
+      Condition=" '$(DotNetBuildSourceOnly)' != 'true' AND ('$(TargetOsName)' == 'win' AND '$(TargetArchitecture)' == 'x64') "
       Returns="@(TargetPathWithTargetPlatformMoniker)">
     <MSBuild Projects="@(RequiresDelayedBuild)"
         BuildInParallel="$(BuildInParallel)"
@@ -52,13 +53,13 @@
     </MSBuild>
   </Target>
 
-  <Target Name="CleanDelayedProjects" BeforeTargets="Clean" Condition=" '$(DotNetBuildSourceOnly)' != 'true' ">
+  <Target Name="CleanDelayedProjects" BeforeTargets="Clean" Condition=" '$(DotNetBuildSourceOnly)' != 'true' AND ('$(TargetOsName)' == 'win' AND '$(TargetArchitecture)' == 'x64') ">
     <MSBuild Projects="@(RequiresDelayedBuild)" BuildInParallel="$(BuildInParallel)" Targets="Clean" />
   </Target>
 
   <Target Name="CreateHelixPayloadDelayedProjects"
       BeforeTargets="CreateHelixPayload"
-      Condition=" '$(DotNetBuildSourceOnly)' != 'true' "
+      Condition=" '$(DotNetBuildSourceOnly)' != 'true' AND ('$(TargetOsName)' == 'win' AND '$(TargetArchitecture)' == 'x64') "
       Returns="@(HelixWorkItem)">
     <MSBuild Projects="@(RequiresDelayedBuild)"
         BuildInParallel="$(BuildInParallel)"
@@ -76,19 +77,19 @@
     </MSBuild>
   </Target>
 
-  <Target Name="PackDelayedProjects" BeforeTargets="Pack" Condition=" '$(DotNetBuildSourceOnly)' != 'true' ">
+  <Target Name="PackDelayedProjects" BeforeTargets="Pack" Condition=" '$(DotNetBuildSourceOnly)' != 'true' AND ('$(TargetOsName)' == 'win' AND '$(TargetArchitecture)' == 'x64') ">
     <MSBuild Projects="@(RequiresDelayedBuild)" BuildInParallel="$(BuildInParallel)" Targets="Pack" />
   </Target>
 
-  <Target Name="PublishDelayedProjects" BeforeTargets="Publish" Condition=" '$(DotNetBuildSourceOnly)' != 'true' ">
+  <Target Name="PublishDelayedProjects" BeforeTargets="Publish" Condition=" '$(DotNetBuildSourceOnly)' != 'true' AND ('$(TargetOsName)' == 'win' AND '$(TargetArchitecture)' == 'x64') ">
     <MSBuild Projects="@(RequiresDelayedBuild)" BuildInParallel="$(BuildInParallel)" Targets="Publish" />
   </Target>
 
-  <Target Name="TestDelayedProjects" BeforeTargets="Test" Condition=" '$(DotNetBuildSourceOnly)' != 'true' ">
+  <Target Name="TestDelayedProjects" BeforeTargets="Test" Condition=" '$(DotNetBuildSourceOnly)' != 'true' AND ('$(TargetOsName)' == 'win' AND '$(TargetArchitecture)' == 'x64') ">
     <MSBuild Projects="@(RequiresDelayedBuild)" BuildInParallel="$(BuildInParallel)" Targets="Test" />
   </Target>
 
-  <Target Name="VSTestDelayedProjects" BeforeTargets="VSTest" Condition=" '$(DotNetBuildSourceOnly)' != 'true' ">
+  <Target Name="VSTestDelayedProjects" BeforeTargets="VSTest" Condition=" '$(DotNetBuildSourceOnly)' != 'true' AND ('$(TargetOsName)' == 'win' AND '$(TargetArchitecture)' == 'x64') ">
     <MSBuild Projects="@(RequiresDelayedBuild)" BuildInParallel="$(BuildInParallel)" Targets="VSTest" />
   </Target>