Here you will find the steps to build your own Haiku using Linux - Mint Linux in this case.

1. Install Prerequisites
   
   You'll need at least a Git and SSH client. There's some other packages you'll need which you can install with this command line:-
   
   sudo apt-get install git yasm autoconf automake texinfo flex bison gawk build-essential unzip curl zip less zlib1g-dev libcurl4-openssl-dev
   
   For more information, please navigate to here.
   
   
2. Download the Source
   
   First, setup a place to store the files.
   
   mkdir haiku
   cd haiku
   
   Configure Git
   git config --global user.name "John Doe"
   git config --global user.email "john.doe@developers.com"
   
   Build Tools
   git clone https://git.haiku-os.org/buildtools
   
   Haiku
   git clone https://git.haiku-os.org/haiku
   
   Update the sources
   git pull --rebase
   
   
3. Configure
   
   cd haiku
   
   Building GCC 2.95 binutils
   ./configure --build-cross-tools x86_gcc2 ../buildtools/
   
   Building GCC 4.x binutils
   /configure --build-cross-tools x86 ../buildtools/
   
   
4. Compile
   
   jam -q -j2 @image
   
   NB: Change -jX to be the number of cores in your build machine.
   
   

Happy Haiku-ing !