On X11 clipboard content is owned by the application, Data copied to clipboard remains in the clipboard only as long as the parent application is running and is discarded when the application quits.
I have added xclip as a dependecy to solve this issue. Deepin Screenshot creates a temporary file and then sends it to the xclip.
- martyr-deepin/deepin-screenshot#8
Please see for updated version: https://aur.archlinux.org/packages/deepin-screenshot-copy-patch
mkdir deepin-screenshot-patch
cd mkdir deepin-screenshot-patch
wget https://gist.githubusercontent.com/msenol86/c0c7daad3de32a7922486e5d669f24c6/raw/82abb9ad54f13c8e53d6272e0d0a999498ffa204/PKGBUILD
wget https://gist.githubusercontent.com/msenol86/c0c7daad3de32a7922486e5d669f24c6/raw/82abb9ad54f13c8e53d6272e0d0a999498ffa204/xclip.patch
sudo pacman -Sy --needed base-devel
makepkg -si