Add the repository to your configuration (e.g.,
   
    /etc/apt/sources.list.d/other-rkward.list
   
   ):
  
# for binary packages: deb [signed-by=/usr/share/keyrings/rkward-keyring.gpg] https://distribute.kde.org/rkward/debR40 unstable main # for source packages: deb-src [signed-by=/usr/share/keyrings/rkward-keyring.gpg] https://distribute.kde.org/rkward/debR40 unstable main
   You might have to temporarily replace
   
    deb
   
   with
   
    deb [trusted=yes]
   
   in your
   
    other-rkward.list
   
   file until after you installed the following keyring package, or apt might refuse to install it because it doesn't know the included OpenPGP key yet. Make sure you remove the
   
    [trusted=yes]
   
   after the keyring was successfully installed!
  
To be able to make use of secure apt, install the repository's OpenPGP keyring package:
sudo apt update sudo apt install rkward-keyring
You can then install the package:
sudo apt install r-other-rkward-ximple
In case you'd rather like to download the package manually, here it is:
Package source code: