sandbox-npm-install
Install npm packages in a Docker sandbox environment. Use this skill whenever you need to install, reinstall, or update node_modules inside a container where the workspace is mounted via virtiofs. Native binaries (esbuild, lightningcss, rollup) crash on virtiofs, so packages must be installed on the local ext4 filesystem and symlinked back.
Profile →npx skills add github/awesome-copilot --skill sandbox-npm-install --agent copilot
Same command for any agent — swap --agent for claude-code, codex, cursor.
Weekly change comes from our own snapshots, not the repository page — it measures attention, not adoption.
# Sandbox npm Install ## When to Use This Skill Use this skill whenever: - You need to install npm packages for the first time in a new sandbox session - `package.json` or `package-lock.json` has changed and you need to reinstall - You encounter native binary crashes with errors like `SIGILL`, `SIGSEGV`, `mmap`, or `unaligned sysNoHugePageOS` - The `node_modules` directory is missing or corrupted ## Prerequisites - A Docker sandbox environment with a virtiofs-mounted workspace - Node.js and npm available in the container - A `package.json` file in the target workspace ## Background Docker sandbox workspaces are typically mounted via **virtiofs** (file sync between the host and Linux VM). Native Go and Rust binaries (esbuild, lightningcss, rollup, etc.) crash with mmap alignment failures when executed from virtiofs on aarch64. The fix is to install on the container's local ext4 filesystem and symlink back into the workspace. ## Step-by-Step Installation Run the bundled install script from the workspace root: ```bash bash scripts/install.sh ``` ### Common Options | Option | Description | |---|---| | `--workspace <path>` | Path to directory containing `package.json` (auto-detected if
- When to Use This Skill
- Prerequisites
- Background
- Step-by-Step Installation
- Common Options
- What the Script Does
- Post-Install Verification
- Important Notes
- Troubleshooting
- Vite Compatibility
bash scripts/install.sh npm test # Run project tests npm run build # Build the project npm run dev # Start dev server
What does the sandbox-npm-install skill do?
Install npm packages in a Docker sandbox environment. Use this skill whenever you need to install, reinstall, or update node_modules inside a container where the workspace is mounted via virtiofs. Native binaries (esbuild, lightningcss, rollup) crash on virtiofs, so packages must be installed on the local ext4 filesystem and symlinked back.
How do I install it?
Run `npx skills add github/awesome-copilot --skill sandbox-npm-install --agent claude-code` — it drops the skill into your project so the agent can pick it up. Swap the --agent value for codex, cursor or copilot if you use one of those.
Where does this skill come from?
From github/awesome-copilot, a repository with 37,432 stars. We read it straight from the repository tree rather than a submitted listing, so what you see here is what is actually published.
Is a popular skill a good skill?
Not necessarily. Stars measure attention, not adoption — a repository can trend for a week and be abandoned. That is why we show the weekly change from our own snapshots next to the total, instead of a single flattering number.