nested node exec call debugging

output.log

» node test.js
outer call $PATH:
 /Users/gguthe/.cargo/bin:/Developer/NVIDIA/CUDA-5.0/bin:/usr/local/share/npm/bin:/usr/local/bin:/usr/local/sbin:/usr/local/lib:/usr/local/lib/python2.7/site-packages:/Users/gguthe/bin:/Users/gguthe/.cabal/bin:/usr/local/bin:/usr/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/Users/gguthe/.cargo/bin:/Developer/NVIDIA/CUDA-5.0/bin:/usr/local/share/npm/bin:/usr/local/lib:/usr/local/lib/python2.7/site-packages:/Users/gguthe/bin:/Users/gguthe/.cabal/bin:/usr/local/opt/go/libexec/bin:/Users/gguthe/bin/bin:/usr/local/opt/go/libexec/bin:/Users/gguthe/bin/bin

inner call $PATH:
 /usr/gnu/bin:/usr/local/bin:/bin:/usr/bin:.

test.js

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

var cp = require('child_process')

var cmd = 'echo $PATH'
cp.exec(cmd, function(err, stdout) {
    var cmd = 'echo $PATH'
    console.log('outer call $PATH:\n', stdout)
    cp.exec(cmd, { env: { GIT_CONFIG: 'BLAH' } }, function(err, stdout) {
      console.log('inner call $PATH:\n', stdout)
    })
})