diff --git a/src/coreclr/crossgen-corelib.proj b/src/coreclr/crossgen-corelib.proj
index 3a7a3b3f44a02..c1d817f976e9e 100644
--- a/src/coreclr/crossgen-corelib.proj
+++ b/src/coreclr/crossgen-corelib.proj
@@ -24,7 +24,7 @@
 
       <CrossDir></CrossDir>
       <CrossDir Condition="'$(TargetArchitecture)' == 'arm' or '$(TargetArchitecture)' == 'arm64'">x64</CrossDir>
-      <CrossDir Condition="'$(TargetArchitecture)' == 'arm' and !$(UseCrossgen2)">x86</CrossDir>
+      <CrossDir Condition="'$(TargetArchitecture)' == 'arm' and !$(UseCrossgen2) and '$(OS)' == 'Windows_NT'">x86</CrossDir>
       <CrossDir Condition="'$(TargetArchitecture)' == 'x86' and '$(BuildArchitecture)' != '$(TargetArchitecture)' and $(UseCrossgen2)">$(BuildArchitecture)</CrossDir>
 
       <BuildDll>true</BuildDll>