diff --git a/src/libraries/System.Runtime.Serialization.Formatters/src/System.Runtime.Serialization.Formatters.csproj b/src/libraries/System.Runtime.Serialization.Formatters/src/System.Runtime.Serialization.Formatters.csproj
index 7b5f4b4b3b4..ff0f8cab28f 100644
--- a/src/libraries/System.Runtime.Serialization.Formatters/src/System.Runtime.Serialization.Formatters.csproj
+++ b/src/libraries/System.Runtime.Serialization.Formatters/src/System.Runtime.Serialization.Formatters.csproj
@@ -12,7 +12,7 @@
   <PropertyGroup>
     <NoWarn>$(NoWarn);CA1822;IDE0060</NoWarn>
 
-    <FunctioningBinaryFormatter Condition="'$(TargetFramework)' == '$(NetCoreAppMinimum)'">true</FunctioningBinaryFormatter>
+    <FunctioningBinaryFormatter Condition="'$(TargetFramework)' == '$(NetCoreAppMinimum)' and '$(DotNetBuildSourceOnly)' != 'true'">true</FunctioningBinaryFormatter>
     <!-- The GenerateNuspec target fails if this property is keyed off of FunctioningBinaryFormatter, so keep it logically in sync --> 
     <IncludeBuildOutput Condition="'$(TargetFramework)' == '$(NetCoreAppCurrent)'">false</IncludeBuildOutput>
     <SuppressDependenciesWhenPacking Condition="'$(FunctioningBinaryFormatter)' != 'true'">true</SuppressDependenciesWhenPacking>