nrm 1.2.1报错：

[TypeError [ERR_INVALID_ARG_TYPE]: The "path" argument must be of type string. Received undefined
  at validateString (internal/validators.js:122:11)
  at Object.join (path.js:375:7)
  at Object.<anonymous> (C:\Users\liyin\AppData\Roaming\npm\node_modules\nrm\cli.js:17:20)
  at Module._compile (internal/modules/cjs/loader.js:1076:30)
  at Object.Module._extensions..js (internal/modules/cjs/loader.js:1097:10)
  at Module.load (internal/modules/cjs/loader.js:941:32)
  at Function.Module._load (internal/modules/cjs/loader.js:782:14)
  at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:72:12)
  at internal/main/run_main_module.js:17:47
] {
  code: 'ERR_INVALID_ARG_TYPE'
}

找到nrm目录(错误第四行)

打开cli.js 第17行修改成

//const NRMRC = path.join(process.env.HOME, '.nrmrc'); (删除)
const NRMRC = path.join(process.env[(process.platform == 'win32') ? 'USERPROFILE' : 'HOME'], '.nrmrc');

参考： #79