isol
Mittels pinning sollte du es ja halbwegs sicher funktionieren.
/etc/apt/preferences.d/ohh-bunt-du
# 550 https://download.grommunio.com/supported/Ubuntu_24.04 Ubuntu_24.04/main amd64 Packages
# release v=supported,o=grommunio,n=Ubuntu_24.04,l=grommunio,c=main,b=amd64
# 50 https://download.grommunio.com/devel/Ubuntu_24.04 Ubuntu_24.04/main amd64 Packages
# release v=devel,o=grommunio,n=Ubuntu_24.04,l=grommunio,c=main,b=amd64
# 450 https://download.grommunio.com/community/Ubuntu_24.04 Ubuntu_24.04/main amd64 Packages
# release v=community,o=grommunio,n=Ubuntu_24.04,l=grommunio,c=main,b=amd64
#
Package: *
Pin: release o=grommunio, v=community, n=ubuntu*
Pin-Priority: 450
Package: *
Pin: release o=grommunio, v=supported, n=ubuntu*
Pin-Priority: 550
Package: *
Pin: release o=grommunio, v=devel
Pin-Priority: 50