Post install is replacing npm install folder in linux

I am doing npm install ,after that it is creating node modules folder . then there is post install option is there which is working fine in windows but in Linux box it is deleting node modules and creating again . package.json format:

{

"someDependency":{ "@fortawesome/ember-fontawesome": "0.1.9", "@fortawesome/free-regular-svg-icons": "5.1.0", }, "scripts":{ "postInstall": "npm install --abc download" } }

can anyone help me with how to resolve the issue.