$ brew doctor Please note that these warnings are just used to help the Homebrew maintainers with debugging if you file an issue. If everything you use Homebrew for is working fine: please don't worry and just ignore them. Thanks! Warning: python is symlinked to python3 This will confuse build scripts and in general lead to subtle breakage. Warning: "config" scripts exist outside your system or Homebrew directories. `./configure` scripts often look for *-config scripts to determine if software packages are installed, and what additional flags to use when compiling and linking. Having additional scripts in your path can confuse software installed via Homebrew if the config script overrides a system or Homebrew provided script of the same name. We found the following "config" scripts: /Users/m_fujii/.pyenv/shims/curl-config /Users/m_fujii/.pyenv/shims/freetype-config /Users/m_fujii/.pyenv/shims/libdynd-config /Users/m_fujii/.pyenv/shims/libpng-config /Users/m_fujii/.pyenv/shims/libpng16-config /Users/m_fujii/.pyenv/shims/python-config /Users/m_fujii/.pyenv/shims/python2-config /Users/m_fujii/.pyenv/shims/python2.7-config /Users/m_fujii/.pyenv/shims/python3-config /Users/m_fujii/.pyenv/shims/python3.4-config /Users/m_fujii/.pyenv/shims/python3.4m-config /Users/m_fujii/.pyenv/shims/xml2-config /Users/m_fujii/.pyenv/shims/xslt-config
$ brew doctor Your system is ready to brew.