CompatHelper Github action stopped finding Julia

Tooling
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1

In the last few days my CompatHelper workflows on Github have stopped working, e.g.,

2026-11-13T03:52:07.3754547Z ##[group]Run julia -e 'using Pkg; Pkg.add("CompatHelper")'
2026-11-13T03:52:07.3755579Z julia -e 'using Pkg; Pkg.add("CompatHelper")'
2026-11-13T03:52:07.4295235Z shell: /usr/bin/bash -e {0}
2026-11-13T03:52:07.4296434Z ##[endgroup]
2026-11-13T03:52:07.4553099Z /home/runner/work/_temp/d7d72ccc-8bd5-41fc-975e-f0c1b9da2450.sh: line 1: julia: command not found

Do we now have to add the julia-setup action to compathelper? I cannot switch to Dependabot because I’m using a private registry.

2

Yes, on ubuntu-latest, as this has updated to Ubuntu 26, which doesn’t ship with Julia.

3

Yeah, just add a setup-julia step.

4

See also the latest Compathelper.yml, which includes the Julia install step.