(I know I asked this many times in IRC channel but I don't remember getting any answers. I apologize if anyone had answered this on IRC channel and I missed) With current build system, even if I choose "devel1" it always builds stage2 compiler too. A comment in build.mk says that it's for working on stage1 compiler, so I'd expect it to build only stage1. The reason I want stage1-only builds is the time it takes to build both stages. It takes approximately 30 minutes and if I could reduce this down to half that would greatly improve my work flow. Most of the time I don't need a full build, but in my experience, it's very easy to end up in a state where `make` simply can't build, and only easy fix is a `make clean`, which costs 30 minutes because then I have to build from scratch. This happens way too often, and so I need a stage1-only build. Thanks..