In general, for unsupported (by us) Linux variants, you should install the flatpak version of ChimeraX. In your particular case, if you don't want to use the flatpak, you might want to try the Ubuntu 24.04 version instead of the 22.04 version. Or, if that doesn't work, copy the missing packages from an Ubuntu repository, and install them by hand before installing ChimeraX. HTH, Greg On 7/21/2026 6:40 AM, Bruno Hay Mele via ChimeraX-users wrote:
Hi!
I am unable to install any currently available ChimeraX release or daily build on my Debian testing because the Ubuntu packages depend on libraries that are no longer available in Debian testing.
ucsf-chimerax_1.11.1ubuntu22.04_amd64.deb ucsf-chimerax_1.12ubuntu22.04_amd64.deb ucsf-chimerax-daily:amd64=2026.07.20ubuntu22.04
fail because I do not have/cannot install libnsl2, libosmesa6
ucsf-chimerax-daily:amd64=2026.07.20ubuntu24.04 fail because I do not have/cannot install libosmesa6
ucsf-chimerax-daily:amd64=2026.07.20ubuntu26.04 fail because I do not have/cannot install libc6 and libosmesa6
System information:
Distribution: Debian GNU/Linux testing/forky Architecture: amd64 Kernel: 7.0.7+deb14-amd64 glibc: 2.42-17 GPU: Intel HD Graphics 4000, using the i915 driver Installed NIS library: libnsl3 2.0.1-2 Installed development package: libnsl-dev 2.0.1-2
Available SONAMEs: libnsl.so.3 libnsl.so.1 libnsl.so
Not available from the configured Debian testing repositories:
libnsl2 libosmesa6 libosmesa6-dev
I am somewhat puzzled because, as far as I remember, both the production and daily builds were working on this same system until roughly two weeks ago. It is possible that a recent Debian testing upgrade removed or replaced the required compatibility libraries, so I may simply have been too aggressive in keeping the system fully up to date.