diff --git a/tools-local/tasks/installer.tasks/installer.tasks.csproj b/tools-local/tasks/installer.tasks/installer.tasks.csproj
index 4af7ac6733..02b543d7c1 100644
--- a/tools-local/tasks/installer.tasks/installer.tasks.csproj
+++ b/tools-local/tasks/installer.tasks/installer.tasks.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>netstandard2.0</TargetFrameworks>
-    <TargetFrameworks Condition="'$(RunningOnUnix)' != 'true'">$(TargetFrameworks);net46</TargetFrameworks>
+    <TargetFrameworks Condition="'$(OS)' == 'Windows_NT'">$(TargetFrameworks);net46</TargetFrameworks>
     <EnableDefaultCompileItems>false</EnableDefaultCompileItems>
   </PropertyGroup>