"connect ECONNREFUSED" with phonegap

"connect ECONNREFUSED" with phonegap

I'm trying to build a new phonegap project. When I type the command
"phonegap build android",on a windows console, I have this message :
[phonegap] detecting Android SDK environment...
[phonegap] using the remote environment
[phonegap] PhoneGap/Build Login
[phonegap] Sign up at build.phonegap.com
[warning] GitHub accounts are unsupported
[prompt] enter username: GCorbel
[prompt] enter password:
[error] connect ECONNREFUSED
I'm behind a proxy. I added my proxy to node like this :
npm config set https-proxy http://proxyname:8080
It works when I do a command like npm install ....
phonegap is trying to connect "build.phonegap.com" directly, without to
pass by the proxy.
Any solution?