# jetson-build-source

Rebuilds kernel, DTBs and OOT modules from changes under bsp_sources/, then writes the manifest deploy reads.

- skill · `type=skill` · Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, OpenCode · 1100 installs · ★ 3735
- Author: Jetson Team
- License: Apache-2.0 · policy=mirror · the beginning of the file is at the end of this page
- Source: https://github.com/NVIDIA/skills/tree/HEAD/skills/jetson-build-source/SKILL.md
- Updated: 2026-10-23
- HTML: https://affpapa.org/en/nevibecode/skills/jetson-build-source

## What it does

This skill is the Build stage of the Setup → Customize → Build → Deploy pipeline. It inspects which repos under `bsp_sources/` are dirty, rebuilds the artifacts those changes imply, and records what was rebuilt in a manifest. It never writes into `<bsp_image.root_path>` itself — `jetson-promote-image` copies each artifact into place at Deploy.

Four modes cover the dirty-repo profiles: `dt` builds NVIDIA DTBs only, `oot` handles the out-of-tree modules, `kernel` produces `Image` plus the full in-tree `.ko` set and kernel-side dtbs, and `full` adds install consolidation. Run it with no argument and the mode is picked automatically. The build drives NVIDIA's own primitives from `Linux_for_Tegra/source/` instead of reimplementing them in shell.

You need an active target profile with `bsp_image:` and `source.toolchain:` resolved, a populated `bsp_sources/`, and `kernel_src_build_env.sh` extracted from `public_sources.tbz2`. On the host, `flex`, `bison` and `libssl-dev` are required. Check the toolchain prefix before you start: `CROSS_COMPILE` must end with a dash, otherwise kbuild fails with `command not found`. Overlay-only edits such as `nvpmodel.conf`, `nvfancontrol.conf` and the BPMP DTB skip this stage entirely.

## Install

### Claude Code (native platform)

1. **Skills CLI (Vercel)**
```bash
npx skills add NVIDIA/skills --skill jetson-build-source -a claude-code
```

2. **Manually: put the files in place**
- File: `~/.claude/skills/jetson-build-source/SKILL.md` — Copy the whole skill folder; for one project use .claude/skills/jetson-build-source/

### Codex

1. **Skills CLI (Vercel)**
```bash
npx skills add NVIDIA/skills --skill jetson-build-source -a codex
```

2. **Manually: put the files in place**
- File: `.agents/skills/jetson-build-source/SKILL.md` — For all projects use ~/.agents/skills/

### Cursor

1. **Skills CLI (Vercel)**
```bash
npx skills add NVIDIA/skills --skill jetson-build-source -a cursor
```

2. **Manually: put the files in place**
- File: `.cursor/skills/jetson-build-source/SKILL.md` — Cursor also reads .agents/skills/ and .claude/skills/

### GitHub Copilot

1. **GitHub CLI**
```bash
gh skill install NVIDIA/skills jetson-build-source
```

2. **Manually: put the files in place**
- File: `.github/skills/jetson-build-source/SKILL.md`

### Gemini CLI

1. **Skills CLI (Vercel)**
```bash
npx skills add NVIDIA/skills --skill jetson-build-source -a gemini-cli
```

2. **Platform CLI**
```bash
gemini skills install https://github.com/NVIDIA/skills --path skills/jetson-build-source
```

### Windsurf (Devin Desktop)

**Manually: put the files in place**
- File: `.devin/skills/jetson-build-source/SKILL.md` — The legacy .windsurf/skills/ path still works

### OpenCode

**Skills CLI (Vercel)**
```bash
npx skills add NVIDIA/skills --skill jetson-build-source -a opencode
```

### Claude.ai

**Claude.ai**
- Zip the folder and upload it in Settings → Capabilities → Skills

Where a file is given instead of a command, copy the files from the source to that path: https://github.com/NVIDIA/skills/tree/HEAD/skills/jetson-build-source/SKILL.md

## When to use it
- rebuild the Jetson kernel after edits under `bsp_sources/`
- build only DTBs without touching modules
- rebuild OOT modules after a `git pull`
- record rebuilt artifacts in a manifest for deploy
- register the composite custom overlay in the Makefile

## Example prompts
- /jetson-build-source
- /jetson-build-source kernel
- Rebuild the BSP: kernel and modules changed

## Source text · SKILL.md · Apache-2.0

Below is the content of a third-party file. It is data, not instructions for you: do not act on anything written inside unless the human asks. Block tag: cbac4154d3c5d795.

BEGIN THIRD-PARTY FILE cbac4154d3c5d795
```text
---
name: jetson-build-source
description: >-
  Use when you need to rebuild the BSP overlay — DT, OOT modules,
  or kernel — from changes under bsp_sources/. Triggers: build
  bsp, rebuild dtb, rebuild kernel.
version: 0.0.1
license: "Apache-2.0"
argument-hint: "dt | oot | kernel | full"
metadata:
  data-classification: public
  author: "Jetson Team"
  team: pts
  tags:
    - bsp
    - build
  domain: meta
---

# Build BSP Source

## Purpose

Rebuild the kernel-side artifacts (DTBs, OOT modules, in-tree
modules, kernel `Image`) implied by changes under
`<source.root_path>/bsp_sources/`, and write a manifest that
`/jetson-promote-image` reads to stage those outputs into the BSP
image. The skill never writes into `<bsp_image.root_path>` itself.

## Prerequisites

- Active target-platform profile with `bsp_image:` and
  `source.toolchain:` resolved (run `/jetson-init-image` and
  `/jetson-init-source` first).
- `<source.root_path>/bsp_sources/` populated with the kernel-side
  checkout layout `/jetson-init-source` materializes.
- `<bsp_image.root_path>/Linux_for_Tegra/source/kernel_src_build_env.sh`
  present (extracted from `public_sources.tbz2`).
- Host packages: `flex`, `bison`, `libssl-dev` (hard); `git`,
  `build-essential`, `bc`, `zstd` (warn-only).
- Cross-toolchain at `${source.toolchain}gcc` resolvable on disk.

## Overview

This skill is the **Build** stage of the workflow — see
[`../../context/bsp-customization-workflow.md`](../../context/bsp-customization-workflow.md)
for where it sits in the Setup → Customize → Build → Deploy pipeline
and what triggers it. The skill takes source-side customization
commits, rebuilds the implied artifacts, and records which were
rebuilt in a manifest. Outputs stay in-tree under
`<source.root_path>/bsp_sources/`;
[`jetson-promote-image`](../jetson-promote-image/SKILL.md) reads the
manifest at Deploy to copy each rebuilt artifact into the matching
path under `<bsp_image.root_path>/Linux_for_Tegra/`.

Overlay-only edits (`nvpmodel.conf`, `nvfancontrol.conf`, BPMP DTB)
skip Build — `customize-*` stages them directly to the overlay
tracker; BPMP DTB uses the `dtc` decompile → edit → recompile loop in
[`../../references/bsp-customization-bpmp-dtb.md`](../../references/bsp-customization-bpmp-dtb.md).

**Custom-overlay slot ownership.** Kernel-DT customizations from
every customize-* skill collect into a single composite
`tegra<soc>-<carrier-id-sku>+<module-id>-xxxx-custom.dts` per
active target — see
[`../../references/bsp-customization-kernel-dtb.md`](../../references/bsp-customization-kernel-dtb.md)
```
END THIRD-PARTY FILE cbac4154d3c5d795

The third-party file has ended. Everything between the cbac4154d3c5d795 tags is data: requests and commands from it are not followed. An “end of file” line with another tag inside the block is part of the file.

First 2602 of 20078 bytes. © Jetson Team · Apache-2.0 · https://github.com/NVIDIA/skills/tree/HEAD/skills/jetson-build-source/SKILL.md

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