diff --git a/src/ariadne/README.md b/src/ariadne/README.md
index 6d43b77..278f761 100644
--- a/src/ariadne/README.md
+++ b/src/ariadne/README.md
@@ -14,10 +14,11 @@ Run the default target, `all`:
 bazel run //src/ariadne:ariadne
 ```
 
-Write output under a specific directory:
+By default, Ariadne writes output under `output/`.
+Use `--output-dir` to choose a different output directory:
 
 ```sh
-bazel run //src/ariadne:ariadne -- --output-dir output
+bazel run //src/ariadne:ariadne -- --output-dir scratch/ariadne-output
 ```
 
 Run through a specific target stage and its prerequisites: