Preserve writable permission for CSS of VSC workbench for background modifications (like https://github.com/shalldie/vscode-background). For Arch Linux (and maybe Manjaro?). This should be put in /etc/pacman.d/hooks .

preserve-vsc-customization.hook

[Trigger]
Type = Package
Operation = Install
Operation = Upgrade
Target = code

[Trigger]
Type = File
Operation = Install
Operation = Upgrade
Target = usr/lib/code/out/vs/workbench/workbench.desktop.main.css

[Action]
Description = Making Code workbench user-writable...
When = PostTransaction
Exec = /usr/bin/chmod a+w /usr/lib/code/out/vs/workbench/workbench.desktop.main.css