NPM doesn't install dependencies that need build

Question

My package.json file looks like the following :

{
  "name": "anna-backend",
  "version": "1.0.3",
  "description": "Backend for ANNA intranet",
  "main": "app.js",
  "author": "IpsaOne DevTeam",
  "private": true,
  "license": "ISC",
  "dependencies": {
    "async": "^2.6.0",
    "bcrypt": "^1.0.3",
    "body-parser": "^1.17.2",
    "mmmagic": "^0.4.6",
    [...]
  }
}

When I run npm install in the folder, everything installs well except the dependencies that require building via node-gyp (like bcrypt, mmmagic) and I have to install them manually by typing npm install mmmagic . Otherwise, they're just not installed and my application doesn't start.

Is it expected behaviour ? Can I do anything about it ?

Answer 1

mmmagic module has issues on install https://github.com/mscdex/mmmagic/issues/111

try install at last version 0.5.0