UmVirt ReactOS autobuild

ReactOS source code packages bundle with automated build script.

Final product is bootable ISO disk image.

What is ReactOS

Free Windows-compatible Operating System.

WWW: https://github.com/reactos/reactos

Video

Autonomous and automatic ReactOS compilation in ULFS - https://www.youtube.com/watch?v=gXQFmsZtpR4

Objectives

• proof that ULFS can be used as build environment
• building ReactOS in off-line mode
• compilation benchmarking
• testing old hardware and emulators
• education

Downloads

ReactOS-0.4.15-dev for ULFS 0.2.3

reactos-0.4.15_dev-autobuild-2025-08-05.tar [ MD5-checksum ]

ReactOS-0.4.14-dev for ULFS 0.2

reactos-0.4.14_dev-autobuild-2023-05-10.tar [ MD5-checksum ]

Preparation

• Install package "python2"

• Create symlink "/usr/bin/python" which lead to "/usr/bin/python2":

  ln -s python2 /usr/bin/python
  

Building

• Extract archive

• Run build script:

  time ./build