Adding those lines to .bashrc, helped with the flatpak commands. I can run them without having to type “flatpak run”. I did this for nix: export XDG_DATA_DIRS=$HOME/.nix-profile/share:$HOME/.share:“${XDG_DATA_DIRS:-/usr/local/share/:/usr/share/}” However, I still cannot see the entries in rofi. The package is Chromium browser.