WINEPREFIX If set, the content of this variable is taken as the name of the directory where wine stores its data (the default is $HOME/.wine ). This directory is also used to identify the socket which is used to communicate with the wineserver. All wine processes using the same wine‐ server (i.e.: same user) share certain things like registry, shared memory, and config file. By setting WINEPREFIX to different values for different wine processes, it is possible to run a number of truly independent wine processes.