diff --git a/stack.yaml b/stack.yaml
index 41c2745d5..ecf974256 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -9,6 +9,8 @@ flags:
     plugins: true
   mintty:
     Win32-2-13-1: false
+  sendfile:
+    portable: true
 
 packages:
 - '.'