diff --git a/README.md b/README.md
index 04b001093..cc15e5e10 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,20 @@ Mobilizon is your federated organization and mobilization platform. Gather peopl
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+## Notes about this fork
+
+The currently deployed `main` branch can be tested at [https://rotes.potsda.mn/](https://rotes.potsda.mn/).
+
+### Building with Nix
+
+For building this locally, you can use Nix (with Flakes enabled):
+
+```
+$ nix build git+ssh://git@git.potsda.mn/potsda.mn/mobilizon.git?ref=main#mobilizon
+```
+
+The built package is then located in `result/`.
+
 ## Introduction
 
 Mobilizon is a tool designed to create platforms for managing communities and events. Its purpose is to help as many people as possible to free themselves from Facebook groups and events, from Meetup, etc.