Add this in your .bashrc to have your local node_modules/.bin in your path

npm_bin

PROMPT_COMMAND=__prompt_command

__prompt_command() {
  # Remove previous existing .bin in $PATH
  PATH=$(echo $PATH | sed -e "s@[^:]\+node_modules/.bin@@ ; s/\(^:\|:$\)// ; s/::/:/")
  # Add current .bin and export
  export PATH=$(npm bin):$PATH
}