diff --git a/stack-windows.yaml b/stack-windows.yaml
index 0181287ca9..9b456bd120 100644
--- a/stack-windows.yaml
+++ b/stack-windows.yaml
@@ -19,7 +19,7 @@ packages:
 - location:
     git: https://github.com/snoyberg/http-client
     commit: 9207033c9869a46f7df759b56d1b317a7f542d63
-  subirs:
+  subdirs:
   - http-client
   extra-dep: true
 extra-deps: