heroku-buildpack-node-preinstall

Heroku buildpack used for running commands before installing Node.

Currently used for overriding the .npmrc file in the build directory with the contents of a config var for authorizing with npm when installing private packages.

Add the buildpack to your Heroku app either using the CLI or the Heroku dashboard.

The heroku-buildpack-node-preinstall needs to run before any buildpack using npm. In the following example, it runs before the heroku/nodejs buildpack:

$ heroku buildpacks:set --index 1 https://github.com/offerzen/heroku-buildpack-node-preinstall.git
$ heroku buildpacks:add heroku/nodejs

Add the NPMRC config var in Heroku with the contents of your .npmrc file.

See this slab post for the details.