diff --git a/README.md b/README.md
index 29b773f..94298cf 100644
--- a/README.md
+++ b/README.md
@@ -45,3 +45,7 @@ nix eval --trace-function-calls .#sometest 2>function-trace.txt
 ```
 
 source: https://discourse.nixos.org/t/nix-flamegraph-or-profiling-tool/33333
+
+## see also
+
+- https://discourse.nixos.org/t/tail-call-optimization-in-nix-today/17763