无法使用jspm安装托管在私有注册表上的npm软件包

我正在尝试让jspm与私有npm注册表一起工作（该镜像反映了公共注册表）。

我使用端点配置工具从.npmrc配置jspm似乎可以正常工作

GAVINJ:jspm-test gavinj$ jspm endpoint config npm
npmrc found, would you like to use these settings? [yes]:
npm registry [http://registry.npm.ourcompanyname.net/]:
Would you like to test these credentials? [yes]:
ok   npm authentication is working successfully.
ok   Endpoint npm configured successfully.

安装我们的软件包“ michelangelo”（不在公共npm注册表中）可以正常工作

GAVINJ:jspm-test gavinj$ npm install michelangelo
[email protected] node_modules/highstock-release
[email protected] node_modules/jquery
[email protected] node_modules/d3
[email protected] node_modules/lodash
[email protected] node_modules/michelangelo

尝试通过jspm安装相同的npm软件包不起作用。

GAVINJ:jspm-test gavinj$ jspm install michelangelo=npm:michelangelo
     Looking up npm:michelangelo

err  Repo michelangelo not found!

warn Installation changes not saved.

尝试通过jspm安装lodash效果很好

GAVINJ:jspm-test gavinj$ jspm install lodash=npm:lodash
     Looking up npm:lodash
     Updating registry cache...
     Looking up github:jspm/nodelibs-process
     Looking up npm:process
ok   Up to date - lodash as npm:lodash@^3.3.1 (3.3.1)
ok   Install tree has no forks.

ok   Install complete.

这是我的jspm配置文件的样子

{
  "registry": "jspm",
  "endpoints": {
    "github": {
      "timeouts": {
        "lookups": 60
      },
      "handler": "jspm-github",
      "remote": "https://github.jspm.io"
    },
    "npm": {
      "timeouts": {
        "lookups": 60
      },
      "registry": "http://registry.npm.ourcompanyname.net/",
      "remote": "https://npm.jspm.io",
      "auth": "PRIVATE_HERE_BUT_SAME_AS_NPMRC_FILE",
      "handler": "jspm-npm"
    },
    "jspm": {
      "timeouts": {
        "lookups": 60
      },
      "handler": "jspm-registry",
      "remote": "https://registry.jspm.io"
    }
  }
}

知道为什么我无法通过jspm安装npm pacakge吗？或者，关于如何找到问题的任何建议？