gyp ERR! stack pyenv: python2: command not found

gyp ERR! stack pyenv: python2: command not found
gyp ERR! stack
gyp ERR! stack The `python2' command exists in these Python versions:
gyp ERR! stack   2.7.5
gyp ERR! stack   2.7.8

解决方案：

$ pyenv versions
  system
  2.7.15
* 3.7.1 (set by /Users/richardlogwood/.pyenv/version)

$ pyenv shell 3.7.1 2.7.15

$ pyenv versions
  system
* 2.7.15 (set by PYENV_VERSION environment variable)
* 3.7.1 (set by PYENV_VERSION environment variable)