R1 System Development Environment ... more than a Linux distribution. ... thanks to T2/SDE.
R1 SDE is not just a regular Linux distribution - it is a flexible Open Source System Development Environment or Distribution Build Kit. Others might even name it Meta Distribution. R1 allows the creation of custom distributions with state of the art technology, up-to-date packages and integrated support for cross compilation. Currently the Linux kernel is usually used, but we also started to port R1 to support compiling home-brew like open source package add-ons on macOS, other BSDs, classic Unix systems (Irix, ...) or support bootstrapping alternative micro kernel systems (like a L4 variant or Fuchsia). Similarly building Haiku, Android, Minix, Hurd, Open (or Pure) Darwin, Haiku and OpenBSD could be supported, too.
Notice: We are a fork of https://t2sde.org/.
It is usually best to start with a pre-built ISO download. More information, including about the latest source tree are at:
SOON
"R1" started as a community driven fork of the T2 Linux project in 2026 which aims at simplicity, clean and lightweight Linux build system.
"R1" was an intern project name for "Revision One".