diff --git a/README.md b/README.md
index 6e7e659..b0fff62 100644
--- a/README.md
+++ b/README.md
@@ -2,14 +2,20 @@
 
 MQTT-controlled 4-channel DDS signal generator using Urukul, Humpback and STM32 NUCLEO.
 
-- [Continuous Integration](https://nixbld.m-labs.hk/job/stm32/stm32/humpback-dds)
-- [Download latest firmware build](https://nixbld.m-labs.hk/job/stm32/stm32/humpback-dds/latest/download-by-type/file/binary-dist)
+- [Continuous Integration](https://nixbld.m-labs.hk/job/mcu/humpback-dds/humpback-dds)
+- [Download latest firmware build](https://nixbld.m-labs.hk/job/mcu/humpback-dds/humpback-dds/latest/download-by-type/file/binary-dist)
 
 ## Nix commands
 
-Start nix shell before anything.
+Humpback-DDS firmware is packaged using the [Nix](https://nixos.org) Flakes system. Install Nix 2.4+ and enable flakes by adding ``experimental-features = nix-command flakes`` to ``nix.conf`` (e.g. ``~/.config/nix/nix.conf``). 
+
+Once you have Flakes enabled, you can use ``nix build`` to build the firmware.
+
+Alternatively, you can develop and build it within Nix shell:
 ```shell
-nix-shell
+nix develop
+python fpga/fpga_config.py
+cargo build --release
 ```
 
 **(For users who had completed the [networking setup](##networking-setup-for-first-time-user))** Flash firmware onto STM32 NUCLEO-H743ZI2 using OpenOCD.