FWIW, this is really a bug in the build daemon that should not set XDG_RUNTIME_DIR to some incorrect value: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=842565
But I'll work around it in the mean time. Cheers, -- ⢀⣴⠾⠻⢶⣦⠀ Raphaël Hertzog <hert...@debian.org> ⣾⠁⢠⠒⠀⣿⡁ ⢿⡄⠘⠷⠚⠋ The Debian Handbook: https://debian-handbook.info/get/ ⠈⠳⣄⠀⠀⠀⠀ Debian Long Term Support: https://deb.li/LTS