diff --git a/doc/buildAndProgram.md b/doc/buildAndProgram.md
index 7909c59c..5850eee5 100644
--- a/doc/buildAndProgram.md
+++ b/doc/buildAndProgram.md
@@ -19,6 +19,7 @@ To build this project, you'll need:
   - see [lv_font_conv](https://github.com/lvgl/lv_font_conv#install-the-script)
   - install npm (commonly done via the package manager, ensure node's version is at least 12)
   - install lv_font_conv: `npm install lv_font_conv`
+- To build resources, you will also need lv_img_conv: `npm install lv_img_conv typescript @swc/core`
 
 ## Build steps
 
@@ -59,6 +60,13 @@ DFU files are the files you'll need to install your build of InfiniTime using OT
 cmake -DARM_NONE_EABI_TOOLCHAIN_PATH=... -DNRF5_SDK_PATH=...
 ```
 
+If you've extracted the NRF SDK and cross compiler into the root of the InfiniTime repo, you can run the following to build just the firmware image which can be loaded over Bluetooth:
+
+```
+PATH="$PATH:$PWD/node_modules/.bin" cmake -DBUILD_DFU=1 -DBUILD_RESOURCES=0 -DARM_NONE_EABI_TOOLCHAIN_PATH=$(realpath ../gcc-arm-none-eabi-10.3-2021.10/) -DNRF5_SDK_PATH=$(realpath ../nRF5_SDK_15.3.0_59ac345/) ..
+make pinetime-mcuboot-app
+```
+
 ### Build the project
 
 During the project generation, CMake created the following targets: