diff --git a/infra/stream/CMakeLists.txt b/infra/stream/CMakeLists.txt
index de438573c..28b34d456 100644
--- a/infra/stream/CMakeLists.txt
+++ b/infra/stream/CMakeLists.txt
@@ -57,8 +57,6 @@ target_sources(infra.stream PRIVATE
     StreamErrorPolicy.hpp
     StreamManipulators.cpp
     StreamManipulators.hpp
-    StreamWriterFile.cpp
-    StreamWriterFile.hpp
     StreamWriterPrintF.cpp
     StreamWriterPrintF.hpp
     StringInputStream.cpp
@@ -67,4 +65,11 @@ target_sources(infra.stream PRIVATE
     StringOutputStream.hpp
 )
 
+if (EMIL_HOST_BUILD)
+    target_sources(infra.stream PRIVATE
+        StreamWriterFile.cpp
+        StreamWriterFile.hpp
+    )
+endif()
+
 add_subdirectory(test)