Hi,
Mixxx for 4MLinux does not exist. However, you can try to run it via Wine:
1) Install Wine (Menu > Extensions > Wine > WineCfg)
2) Download Mixxx installer:
https://downloads.mixxx.org/mixxx-2.....1.4-win32.exe
3) Double click on the mixxx-2.1.4-win32.exe file to start the Mixxx installer.
4) The installer will create a desktop icon, which you can use to start Mixxx.
I have no idea if Mixxx runs flawlessly via Wine. You will have to check it.
Good luck!
.