Werk #18941: Fix installation failure on AlmaLinux 9 due to GLIBC_2.35 symbol mismatch

Component

Linux distributions

Title

Fix installation failure on AlmaLinux 9 due to GLIBC_2.35 symbol mismatch

Date

Mar 25, 2026

Level

Trivial Change

Class

Bug Fix

Compatibility

Compatible - no manual interaction needed

Checkmk versions & editions

2.6.0b1 Not yet released	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.5.0b3	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p25	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.3.0p46	Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Previously, Checkmk packages for AlmaLinux 9 could fail to install on systems pinned to a minor version below 9.7 with an error like:

ImportError: /lib64/libc.so.6: version `GLIBC_2.35' not found (required by
/omd/versions/2.4.0p22.cee/lib/python3.12/lib-dynload/.../.so.1)

AlmaLinux 9.7 backported glibc 2.35 symbols into its glibc 2.34 binary. When the Checkmk build environment resolved its live package mirror to 9.7, shared libraries compiled during the build would require GLIBC_2.35 symbols — which do not exist on AlmaLinux 9.6 and earlier.

The build environment is now pinned to the vault.almalinux.org/9.2 snapshot, ensuring Checkmk packages are always compiled against a baseline glibc 2.34 without the backported 2.35 symbols. Packages will now install correctly on all supported AlmaLinux 9 minor versions.

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