Cosmic Beta DE setup performed via native CashyOS 082825 Calamares installer

 Just select Cosmic during initial run of CashyOS 082825 Calamares installer 

and proceed with installation of Cosmic Beta DE utilizing native CachyOS repositories . Finally make sure that Cosmic Beta has been installed in the same way how we may install KDE Plasma 6.4.5 via original Cachyos ISO as of 08282025

> uname -a
Linux cachyos-devs071025 6.17.1-2-cachyos #1 SMP PREEMPT_DYNAMIC Mon, 06 Oct 2025 23:26:58 +0000 x86_64 GNU/Linux

~
❯ pacman -Ss cosmic-*|grep beta
cachyos-extra-v3/cosmic-app-library 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-applets 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-bg 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-comp 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-files 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-greeter 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-idle 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-initial-setup 1.0.0.beta.1.1-1.1
cachyos-extra-v3/cosmic-launcher 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-notifications 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-osd 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-panel 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-player 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-randr 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-screenshot 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-session 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-settings 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-settings-daemon 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-store 1.0.0.beta.1.1-1.1 (cosmic)
cachyos-extra-v3/cosmic-terminal 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-text-editor 1.0.0.beta.1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/cosmic-workspaces 1:1.0.0beta1.1-1.1 (cosmic) [installed]
cachyos-extra-v3/xdg-desktop-portal-cosmic 1.0.0.beta.1.1-1.1 (cosmic) [installed]
extra/cosmic-app-library 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-applets 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-bg 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-comp 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-files 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-greeter 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-icon-theme 1.0.0.beta.1.1-1 [installed]
extra/cosmic-idle 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-initial-setup 1.0.0.beta.1.1-1
extra/cosmic-launcher 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-notifications 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-osd 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-panel 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-player 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-randr 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-screenshot 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-session 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-settings 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-settings-daemon 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-store 1.0.0.beta.1.1-1 (cosmic)
extra/cosmic-terminal 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-text-editor 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]
extra/cosmic-wallpapers 1:1.0.0.beta.1.1-1 (cosmic) [installed]
extra/cosmic-workspaces 1:1.0.0beta1.1-1 (cosmic) [installed: 1:1.0.0beta1.1-1.1]
extra/xdg-desktop-portal-cosmic 1.0.0.beta.1.1-1 (cosmic) [installed: 1.0.0.beta.1.1-1.1]

We also may install Hyprland with ML4W Dotfiles DEV 2.9.9.3 along with Cosmic Beta DE on CachyOS. Apparently pre-loading  Hyprland virtual instance and performing actions causing trouble for Cosmic creates some shared objects in virtual machine RAM serving in particular the target of normal switching between folders contain desktop wallpapers  and afterwards we may work for a while in Cosmice DE instance preserving ability to manage Cosmic Desktop with no issues visible at first glance .

I have to notice that the only CachyOS provides a straightforward setup of Cosmic Beta DE vs an other clones of Arch Linux . Say Garuda Mokka or Manjaro Linux for instance