*nix shell: How to disable pipe buffering for ALL pipes in a command?

I want *every* pipe to be unbuffered, so I don't have to type stdbuf -oL for every piped command. When concocting commands with multiple pipes, it would be nice if there was a environment variable or something to enable it globally or at least for the remainder of the pipes in the command. Yes I know about unbuffer and stdbuf but they need to be invoked for every pipe... I'm trying to save typing because I do this often. Something like: before:

stdbuf -oL command_1 | stdbuf -oL command_2 | stdbuf -oL command_3

after:

BUFFERING=-oL command_1 | command_2 | command_3