Adds all available system environment variables as parameters to the WiX Compiler candle. This behaviour is similar to candle's option -d. Every environment variable is represented as a separate parameter.

Note: Some environment variables like PATH can cause strange behaviour and lead to errors in compilation because of the usage of some forbidden characters. To prevent addition of some defined environment variables, use the rejection list.

Details on the usage of parameters in the preprocessor can be found on the official pages for the WiX toolset.