diff --git a/doc/manual/rl-next/enter-debugger-more-reliably-in-let-and-calls.md b/doc/manual/rl-next/enter-debugger-more-reliably-in-let-and-calls.md
new file mode 100644
index 00000000000..c9322581608
--- /dev/null
+++ b/doc/manual/rl-next/enter-debugger-more-reliably-in-let-and-calls.md
@@ -0,0 +1,25 @@
+---
+synopsis: The `--debugger` will start more reliably in `let` expressions and function calls
+prs: 9917
+issues: 6649
+---
+
+Previously, if you attempted to evaluate this file with the debugger:
+
+```nix
+let
+  a = builtins.trace "before inner break" (
+    builtins.break "hello"
+  );
+  b = builtins.trace "before outer break" (
+    builtins.break a
+  );
+in
+  b
+```
+
+Nix would correctly enter the debugger at `builtins.break a`, but if you asked
+it to `:continue`, it would skip over the `builtins.break "hello"` expression
+entirely.
+
+Now, Nix will correctly enter the debugger at both breakpoints.