I was trying to install `opencv4nodejs` in `Ubuntu-20.04` using the following command and my node version is `v12.19.0`

```
sudo npm i -g opencv4nodejs

```

But getting those errors

```
info install installing opencv version 3.4.6 into directory: /usr/lib/node_modules/opencv4nodejs/node_modules/opencv-build/opencv
ERR! Error: Command failed: mkdir -p opencv
mkdir: cannot create directory ‘opencv’: Permission denied

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! opencv-build@0.1.9 install: `node ./install.js`
npm ERR! Exit status 1
npm ERR! 
npm ERR! Failed at the opencv-build@0.1.9 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     /root/.npm/_logs/2020-10-28T06_33_21_090Z-debug.log

```