diff --git a/README.md b/README.md
index dc2d26d..6fd2e25 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,9 @@
 # Nix Flake Python Example
 
+> [!IMPORTANT]
+> This approach is a bit outdated, since it uses [mach-nix](https://github.com/DavHau/mach-nix#%EF%B8%8F-this-project-is-unmaintained-%EF%B8%8F) which is unmaintained in favour of [dream2nix](https://github.com/nix-community/dream2nix)  and only supports Python <=3.8
+> If you only need support for older Python versions, this might be fine (but still not future-ready!)
+
 ## TODO
 
 - Checks:
@@ -13,6 +17,7 @@
 
 - `nix`
 - `direnv`
+- `mach-nix`
 
 Or without nix using virtualenv: