Why does npm install say I have unmet dependencies

Question

I have a node package. When I run npm install from the package root, it installs a bunch of things, but then prints several error messages that look like this:

npm WARN unmet dependency /Users/seanmackesey/google_drive/code/explore/generator/node_modules/findup-sync/node_modules/glob requires graceful-fs@'~1.2.0' but will load

I must be confused about what exactly npm install does. If it detects a dependency, shouldn't it install it? Under what conditions does it give me error messages like this, and how can I resolve the dependencies?

Answer 1

This solved it for me:

1. Correct the version numbers in package.json, according to the errors;
2. Remove node_modules (rm -rf node_modules);
3. Rerun npm install.

Repeat these steps until there are no more errors.

Answer 2

I encountered this problem when I was installing react packages and this worked for me: npm install --save <package causing this error>

Answer 3

I was trying to work on an automated deployment system that runs npm install, so a lot of these solutions wouldn't work for me in an automated fasion. I wasn't in a position to go deleting/re-creating node_modules/ nor could I easily change Node.js versions.

So I ended up running npm shrinkwrap - adding the npm-shrinkwrap.json file to my deployment bundle, and running installs from there. That fixed the problem for me; with the shrinkwrap file as a 'helper', npm seemed to be able to find the right packages and get them installed for me. (Shrinkwrap has other features as well, but this was what I needed it for in this particular case).

Answer 4

In my case, the update of npm solved it.

sudo npm install -g npm

Answer 5

I fixed the issue by using these command lines

• $ rm -rf node_modules/
• $ sudo npm update -g npm
• $ npm install

It's done!

Answer 6

The above answers didn't help me fully even after deleteting node_modules directory.

Below command helped me finally:

npm config set registry http://registry.npmjs.org/

Note that this pulls node modules over an insecure HTTP connection.

Src: https://stackoverflow.com/a/13119867/4082503