anchor.diff:  * Phases: `build`
   * Value: "error"
   
  -### <a id="environment-variable-npm-config-production"></a> NPM_CONFIG_PRODUCTION
  +### <a id="environment-variable-npm-config-production"></a> NPM\_CONFIG\_PRODUCTION
   
   The `NPM_CONFIG_PRODUCTION` environment variable installs only production dependencies if NPM install is used.
   
  
positive.code: * Phases: `build`
  * Value: path to the `node` installation
  
  ### <a id="environment-variable-node-path"></a> NODE_PATH
  
  The `NODE_PATH` environment variable sets a search path for node modules.
  
  * Set by: `yarn-cnb`
  * Phases: `build`
  * Value: path to the `node_modules` directory
  
  ### <a id="environment-variable-node-verbose"></a> NODE_VERBOSE
  
  The `NODE_VERBOSE` environment variable adjusts the amount of logging output from NPM during installs.
  
negative.code: * Phases: `build`
  * Value: false
  
  ### <a id="environment-variable-npm-config-loglevel"></a> NPM\_CONFIG\_LOGLEVEL
  
  The `NPM_CONFIG_LOGLEVEL` environment variable adjusts the level of logging NPM uses.
  
  