How to set proxy with authentication in ./setup command in cywgin during setting up developer environment?

I have proxy with user atuthentication in my wifi network. During setting up developer environment as mentioned in https://wiki.documentfoundation.org/Development/lode. I have to run ./setup command to get source code of libre office.I have setted proxy by export=http_proxy…etc in cywgin. But that obviously not work as ./setup is script. How can i do that? Any help is appreciated.