Ghost-CLI: install behind proxy failed.

searched doc and google , could not find how to setup proxy for ghost-cli. or any offline install method?

before run ghost install , I set following parameters:

export http_proxy=proxy-server-name:80
export https_proxy=proxy-server-name:80
export HTTP_PROXY=proxy-server-name:80
export HTTPS_PROXY=proxy-server-name:80
npm config set strict-ssl false -g
npm config set proxy http://proxy-server-name:80 -g
npm config set https-proxy http://proxy-server-name:80 -g
yarn config set proxy http://proxy-server-name:80 -g
yarn config set https-proxy http://proxy-server-name:80 -g

$ghost install
 ✔ Checking for latest Ghost version
 ✔ Running system checks
 ✔ Setting up install directory
 ❯ Downloading and installing Ghost v1.0.0-beta.1
   ✔ Getting download information
   ✖ Downloading
     → tunneling socket could not be established, cause=connect EINVAL 0.0.0.80:80 - Local (0.0.0.0:0)
     Installing dependencies
   Moving files
An error occurred.
Message: 'tunneling socket could not be established, cause=connect EINVAL 0.0.0.80:80 - Local (0.0.0.0:0)'


Debug Information:
    Node Version: v4.8.3
    Ghost-CLI Version: 1.0.0-alpha.18
    Environment: production
    Command: 'ghost install'

 more ghost-cli-debug-2017-06-14T07\:33\:11.481Z.log
Debug Information:
    Node Version: v4.8.3
    Ghost-CLI Version: 1.0.0-alpha.18
    Environment: production
    Command: 'ghost install'
An error occurred.
Message: 'tunneling socket could not be established, cause=connect EINVAL 0.0.0.80:80 - Local (0.0.0.0:0)'

Stack: RequestError: tunneling socket could not be established, cause=connect EINVAL 0.0.0.80:80 - Local (0.0.0.0:0)
    at ClientRequest.<anonymous> (/root/.nvm/v4.8.3/lib/node_modules/ghost-cli/node_modules/download/node_modules/got/index.js:73:21)
    at ClientRequest.g (events.js:260:16)
    at emitOne (events.js:77:13)
    at ClientRequest.emit (events.js:169:7)
    at ClientRequest.onError (/root/.nvm/v4.8.3/lib/node_modules/ghost-cli/node_modules/download/node_modules/caw/node_modules/tunnel-agent/index.js:178:21)
    at ClientRequest.g (events.js:260:16)
    at emitOne (events.js:77:13)
    at ClientRequest.emit (events.js:169:7)
    at Socket.socketErrorListener (_http_client.js:269:9)
    at emitOne (events.js:77:13)
    at Socket.emit (events.js:169:7)
    at emitErrorNT (net.js:1272:8)
    at nextTickCallbackWith2Args (node.js:511:9)
    at process._tickCallback (node.js:425:17)
Code: ECONNRESET
Path: /ghost/-/ghost-1.0.0-beta.1.tgz