Node.bcrypt.js: node-gyp rebuild error 'nan' module not found

[shrikrishnaholla]

Node 6.2.1, Linux 4.1.19 debian, gcc 4.9.2, build-essential 11.7, Python 2.7.9

https://gist.github.com/shrikrishnaholla/5674d9b846b0a46cb4302a0b75139b14

The bcrypt build script fails with Cannot find module 'nan', even when nan is globally installed. Works with node v5.11.1, everything else being same.

[leyyinad]

Same here, running on Ubuntu inside Docker:

FROM jedisct1/phusion-baseimage-latest
ENV DEBIAN_FRONTEND noninteractive
RUN apt-get update
RUN curl -sL https://deb.nodesource.com/setup_6.x | bash -
RUN apt-get install -yq nodejs python # && npm install -g node-gyp
RUN npm install bcrypt

resulting in:

> [email protected] install /node_modules/bcrypt
> node-gyp rebuild

module.js:442
    throw err;
    ^
Error: Cannot find module 'nan'
    at Function.Module._resolveFilename (module.js:440:15)
    at Function.Module._load (module.js:388:25)
    at Module.require (module.js:468:17)
    at require (internal/module.js:20:19)
    at [eval]:1:1
    at Object.exports.runInThisContext (vm.js:54:17)
    at Object.<anonymous> ([eval]-wrapper:6:22)
    at Module._compile (module.js:541:32)
    at node.js:311:29
    at _combinedTickCallback (internal/process/next_tick.js:67:7)

npm-debug.log: https://gist.github.com/leyyinad/3db550282e9526133fc1a29f84482bcd

[leyyinad]

Solved it by manually installing nan into the correct subdir, like

cd $(npm root -g)/npm && npm install nan

Not the most beautiful, but does the trick for me.

[shrikrishnaholla]

cd $(npm root -g)/npm && npm install nan

So npm is missing a dependency? I don't get it, why does installing something into npm's node_modules fix this problem? @leyyinad how did you figure this out? It is working for me as well...

[leyyinad]

I have no idea. I just figured the package was missing and played around a bit. By quickly searching npm's repository I don't see any (even missing) dependency on nan. node-gyp lists nan under devDependencies, could this be the reason?

[shrikrishnaholla]

It must be node-gyp, as the command that throws the error is node-gyp's. But then, installing nan in npm's node_modules has fixed this. It's crazy

Edit:
https://github.com/ncb000gt/node.bcrypt.js/blob/master/binding.gyp#L11

[defunctzombie]

Nan must be installed locally I believe for this to work. Closing because the package.json should be installing nan so I don't think there is an issue with the module but instead maybe a transient network or install issue that happened. If you find that there is an issue with the module please file a new issue with recommendations on a fix. Thanks!

[Luna007]

I have the same error when I do npm install on windows 7. latest npm and node.js

@leyyinad I installed nan under my npm global folder, it does not work. C:\Users\nliu\AppData\Roamingnpmnode_modules

npminstallwindow.txt

[ghost]

module.js:471
    throw err;
    ^

Error: Cannot find module 'number-is-nan'
    at Function.Module._resolveFilename (module.js:469:15)
    at Function.Module._load (module.js:417:25)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/usr/local/lib/node_modules/npm/node_modules/npmlog/node_modules/gauge/node_modules/string-width/node_modules/code-point-at/index.js:2:19)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)

if any command at all starts or has anything to do with 'npm' it throws this error

[danieltanfh95]

2020 and this works for me.

Solved it by manually installing nan into the correct subdir, like

cd $(npm root -g)/npm && npm install nan

Not the most beautiful, but does the trick for me.