---
title: npm-rebuild
section: 1
description: Rebuild a package
---

### Synopsis

```bash
npm rebuild [<package-spec>] ...]

alias: rb
```

### Description

This command does the following:

1. Execute lifecycle scripts (`preinstall`, `install`, `postinstall`, `prepare`)
2. Links bins depending on whether bin links are enabled

This command is particularly useful in scenarios including but not limited to:

1. Installing a new version of **node.js**, where you need to recompile all your C++ add-ons with the updated binary.
2. Installing with `--ignore-scripts` and `--no-bin-links`, to explicitly choose which packages to build and/or link bins.

If one or more package specs are provided, then only packages with a name and version matching one of the specifiers will be rebuilt.

Usually, you should not need to run `npm rebuild` as it is already done for you as part of npm install (unless you suppressed these steps with `--ignore-scripts` or `--no-bin-links`).

If there is a `binding.gyp` file in the root of your package, then npm will use a default install hook:

```
"scripts": {
    "install": "node-gyp rebuild"
}
```

This default behavior is suppressed if the `package.json` has its own `install` or `preinstall` scripts.
It is also suppressed if the package specifies `"gypfile": false`

### Configuration

#### `global`

* Default: false
* Type: Boolean

Operates in "global" mode, so that packages are installed into the `prefix`
folder instead of the current working directory. See
[folders](/configuring-npm/folders) for more on the differences in behavior.

* packages are installed into the `{prefix}/lib/node_modules` folder, instead
  of the current working directory.
* bin files are linked to `{prefix}/bin`
* man pages are linked to `{prefix}/share/man`



#### `bin-links`

* Default: true
* Type: Boolean

Tells npm to create symlinks (or `.cmd` shims on Windows) for package
executables.

Set to false to have it not do this. This can be used to work around the
fact that some file systems don't support symlinks, even on ostensibly Unix
systems.



#### `foreground-scripts`

* Default: `false` unless when using `npm pack` or `npm publish` where it
  defaults to `true`
* Type: Boolean

Run all build scripts (ie, `preinstall`, `install`, and `postinstall`)
scripts for installed packages in the foreground process, sharing standard
input, output, and error with the main npm process.

Note that this will generally make installs run slower, and be much noisier,
but can be useful for debugging.



#### `ignore-scripts`

* Default: false
* Type: Boolean

If true, npm does not run scripts specified in package.json files.

Note that commands explicitly intended to run a particular script, such as
`npm start`, `npm stop`, `npm restart`, `npm test`, and `npm run` will still
run their intended script if `ignore-scripts` is set, but they will *not*
run any pre- or post-scripts.



#### `allow-scripts`

* Default: ""
* Type: String (can be set multiple times)

Comma-separated list of packages whose install-time lifecycle scripts
(`preinstall`, `install`, `postinstall`, and `prepare` for non-registry
dependencies) are allowed to run.

This setting is intended for one-off and global contexts: `npm exec`, `npx`,
and `npm install -g`, where no project `package.json` is involved. For
team-wide policy in a project, use the `allowScripts` field in
`package.json` (which also supports explicit denials), or configure it in
`.npmrc`. Passing `--allow-scripts` on the command line during a
project-scoped `npm install`, `ci`, `update`, or `rebuild` is an error.

Each name is matched against a dependency's resolved identity, not against
the package's self-reported name. `--ignore-scripts` and
`--dangerously-allow-all-scripts` both override this setting.



#### `strict-allow-scripts`

* Default: false
* Type: Boolean

If `true`, turn the install-script policy from a warning into a hard error:
any dependency with install scripts not covered by `allowScripts` will fail
the install instead of running with a notice.

Dependencies explicitly denied with `false` in `allowScripts` are always
silently skipped; this setting only affects unreviewed entries.
`--ignore-scripts` and `--dangerously-allow-all-scripts` both override this
setting.

Optional dependencies that cannot be installed on the current platform or
engine (a non-matching `os`, `cpu`, or `libc`) are not flagged, because
their install scripts never run.



#### `dangerously-allow-all-scripts`

* Default: false
* Type: Boolean

If `true`, bypass the `allowScripts` policy entirely and run every
dependency install script regardless of whether it was approved or denied.
Intended as a migration escape hatch only; its use is strongly discouraged.
`--ignore-scripts` still takes precedence over this setting.



#### `workspace`

* Default:
* Type: String (can be set multiple times)

Enable running a command in the context of the configured workspaces of the
current project while filtering by running only the workspaces defined by
this configuration option.

Valid values for the `workspace` config are either:

* Workspace names
* Path to a workspace directory
* Path to a parent workspace directory (will result in selecting all
  workspaces within that folder)

When set for the `npm init` command, this may be set to the folder of a
workspace which does not yet exist, to create the folder and set it up as a
brand new workspace within the project.

This value is not exported to the environment for child processes.

#### `workspaces`

* Default: null
* Type: null or Boolean

Set to true to run the command in the context of **all** configured
workspaces.

Explicitly setting this to false will cause commands like `install` to
ignore workspaces altogether. When not set explicitly:

- Commands that operate on the `node_modules` tree (install, update, etc.)
will link workspaces into the `node_modules` folder. - Commands that do
other things (test, exec, publish, etc.) will operate on the root project,
_unless_ one or more workspaces are specified in the `workspace` config.

This value is not exported to the environment for child processes.

#### `include-workspace-root`

* Default: false
* Type: Boolean

Include the workspace root when workspaces are enabled for a command.

When false, specifying individual workspaces via the `workspace` config, or
all workspaces via the `workspaces` flag, will cause npm to operate only on
the specified workspaces, and not on the root project.

This value is not exported to the environment for child processes.

#### `install-links`

* Default: false
* Type: Boolean

When set file: protocol dependencies will be packed and installed as regular
dependencies instead of creating a symlink. This option has no effect on
workspaces.



### See Also

* [package spec](/using-npm/package-spec)
* [npm install](/commands/npm-install)
