- Clone slack-git from https://aur.archlinux.org/slack-desktop.git and enter to slack-desktop folder
git clone https://aur.archlinux.org/slack-desktop.git
- Show de git log to select the slack-desktop version, i selected the commit
be95059895d8910b435e75defd58d909dd84ac17
git checkout be95059895d8910b435e75defd58d909dd84ac17
- Install using makepkg