1 files changed, 8 insertions, 1 deletions

diff --git a/bin/why-dont-you b/bin/why-dont-you
index 51bdb5b..0ad6e7e 100755
--- a/bin/why-dont-you
+++ b/bin/why-dont-you
@@ -447,7 +447,14 @@ case "${action}" in
   ;;
 
   *)
-    >&2 printf 'unknown action "%s"\n' "${action}"
+    >&2 printf 'unknown action "%s" - known actions are:' "${action}"
+    >&2 printf ' "%s"' \
+      'build' \
+      'stabilize' \
+      'unstage' \
+      'keep' \
+      'stubbornly_keep'
+    >&2 printf '\n'
     exit 1
 
 esac