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I am using "npm install" to download and compile all the dependencies of a small node.js app I have written. The "package.json" file I am using is correct and contains all the needed information.

One of the packages to be installed has "node-gyp" as a dependency, so I have previously installed the "python2" package.

Now, at a certain point I start getting error messages:

> node-gyp rebuild

gyp ERR! configure error
gyp ERR! stack Error: Can't find Python executable "python", you can set the PYTHON env variable.
gyp ERR! stack     at failNoPython (/usr/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:103:14)
gyp ERR! stack     at /usr/lib/node_modules/npm/node_modules/node-gyp/lib/configure.js:42:11
gyp ERR! stack     at F (/usr/lib/node_modules/npm/node_modules/which/which.js:40:25)
gyp ERR! stack     at E (/usr/lib/node_modules/npm/node_modules/which/which.js:43:29)
gyp ERR! stack     at /usr/lib/node_modules/npm/node_modules/which/which.js:54:16
gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:99:15)
gyp ERR! System Linux 3.18.9-200.fc21.x86_64
gyp ERR! command "node" "/usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /srv/visitor/node_modules/phantom/node_modules/dnode/node_modules/weak
gyp ERR! node -v v0.12.1
gyp ERR! node-gyp -v v1.0.3
gyp ERR! not ok
npm WARN optional dep failed, continuing [email protected]

The issues seems to be that an environment variable is missing.

Can anyone point me in the right direction? No matter where I search on the Internet, there is no mention of a "PYTHON" variable, only "PYTHONPATH" and others like it. What is the correct way to fix this, so that I do not get those errors?

UPDATE 1:

After following advice from this thread I added these commands before executing "npm install":

PYTHON=/usr/sbin/python2
export PYTHON

Now I am getting this error:

> node-gyp rebuild

gyp ERR! build error
gyp ERR! stack Error: not found: make
gyp ERR! stack     at F (/usr/lib/node_modules/npm/node_modules/which/which.js:40:28)
gyp ERR! stack     at E (/usr/lib/node_modules/npm/node_modules/which/which.js:43:29)
gyp ERR! stack     at /usr/lib/node_modules/npm/node_modules/which/which.js:54:16
gyp ERR! stack     at FSReqWrap.oncomplete (fs.js:99:15)
gyp ERR! System Linux 3.18.9-200.fc21.x86_64
gyp ERR! command "node" "/usr/lib/node_modules/npm/node_modules/node-gyp/bin/node-gyp.js" "rebuild"
gyp ERR! cwd /srv/visitor/node_modules/phantom/node_modules/dnode/node_modules/weak
gyp ERR! node -v v0.12.1
gyp ERR! node-gyp -v v1.0.3
gyp ERR! not ok
npm WARN optional dep failed, continuing [email protected]

I find it absurd that it says "...not found: make...". Is there any possibility of it being so? If yes, how come packages install correctly?

Frankly, I do not understand a thing. Any ideas?

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5
  • 1
    You need to set the PYTHON environment variable. What ever is in that variable will be used. Doesn't matter what PYTHONPATH is. Commented Mar 31, 2015 at 12:07
  • @adarsh That much I can tell. Could you please elaborate? If you make an answer out of it, I shall upvote. Commented Mar 31, 2015 at 12:09
  • which OS are you using? how did you install python2? try executing it in command line first Commented Mar 31, 2015 at 12:14
  • @irqed The OS is Arch Linux. The package was installed with "pacman -S python2". Since this is a part of the creation process for a Docker container, I have no practical way of running python from the console. Commented Mar 31, 2015 at 12:17
  • possible duplicate of Running Python on Windows for Node.js dependencies Commented Aug 6, 2015 at 9:58

4 Answers 4

Reset to default
7

Try running this

PYTHON=$PYTHON:/usr/bin/python
export PYTHON

Add this to profile file (like ~/.bash_profile etc. depending on your shell) to make it persistent.

If your python isn't installed in /usr/bin/python then you can run which python to find out where it is installed.

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6 Comments

Will try and report back ASAP.
It does not work. It produces this error: "/bin/sh: line 0: export: `:/usr/bin/python': not a valid identifier". Also, when running "which python", it says that no "python" can be found inside the path.
Oh sorry, I made a mistake in the second line. Use export PYTHON. The $ sign shouldn't be used. I'll edit the answer
Then use which python2 and add that path to the PYTHON variable instead of /usr/bin/python
or just create a proper symlink like distro docs suggest wiki.archlinux.org/index.php/python#Python_2
|
3

First things first: I want to thank all who pitched in to help me with my issue, and especially @adarsh.

Now the real issue was that I was missing "make" and "gcc". At first, when a compiler message suggested so, I found it absurd. But keep in mind that this is an image PULLed from the Docker registry.

I added "pacman -S --needed --noconfirm make gcc" in my Dockerfile, and the build process completes successfully.

It should go without saying, that I also needed to make the suggested changes to the environmental variables.

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1 Comment

Where we need to add the line: pacman -S --needed --noconfirm make gcc
1

This worked for me..

node-gyp --python C:\Users\username\.windows-build-tools\python27\python.exe build

We need to point to python.exe not just up to the installation folder.

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-3

In CMD

if local on drive: npm install express-generator

#npm install express-generator -g
#express --ejs .

choose yes

#y
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