This guide is for Linux only. If you are running Windows, please install Windows Subsystem for Linux and use that for this guide.

1. Install devkitPro pacman from here.
2. Run: sudo dkp-pacman -S 3ds-libtheora 3ds-sdl libctru 3ds-dev.
3. Install Git. The command to do this will vary depending on what Linux distro you're using, but for Debian/Ubuntu, that command will look like this: sudo apt-get install git.
4. Download the Sonic Mania 3DS Quick Build Script from here.
5. Make the script executable by running chmod +x Mania3DSQuickBuild.sh.
6. Run it using ./Mania3DSQuickBuild.sh.
7. When the script is done running, your 3DSX will be located in RSDKv5-Decompilation/bin/3DS/CTR.

If you need any support, please feel free to reach out to the Retro Engine Modding Server on Discord. Invite: http://dc.railgun.works/retroengine