diff --git a/build-files.txt b/build-files.txt
index 58e2808..06451c4 100644
--- a/build-files.txt
+++ b/build-files.txt
@@ -39,6 +39,7 @@
 source/dub/internal/vibecompat/data/utils.d
 source/dub/internal/vibecompat/inet/path.d
 source/dub/internal/vibecompat/inet/url.d
+source/dub/recipe/io.d
 source/dub/recipe/json.d
 source/dub/recipe/packagerecipe.d
 source/dub/recipe/sdl.d