CMake 4.0 broke my workflow on ubuntu-latest

[LegalizeAdulthood]

Description

My CMake/vcpkg based workflow was working fine until CMake was updated to 4.0, now things are failing.

I attempted to revert back to CMake 3.x to verify this, but apparently my apt-fu isn't good enough.

Last working run was 2 days ago:
https://github.com/LegalizeAdulthood/scintilla-example/actions/runs/14164168826

Current failing runs:
https://github.com/LegalizeAdulthood/scintilla-example/actions

Note the macOS workflow is still working because it hasn't been updated to CMake 4 yet.

Platforms affected

• Azure DevOps
• GitHub Actions - Standard Runners
• GitHub Actions - Larger Runners

Runner images affected

• Ubuntu 20.04
• Ubuntu 22.04
• Ubuntu 24.04
• macOS 13
• macOS 13 Arm64
• macOS 14
• macOS 14 Arm64
• macOS 15
• macOS 15 Arm64
• Windows Server 2019
• Windows Server 2022
• Windows Server 2025

Image version and build link

https://github.com/LegalizeAdulthood/scintilla-example/actions/runs/14211819245/job/39820297094

Is it regression?

yes

Expected behavior

last successful build: https://github.com/LegalizeAdulthood/scintilla-example/actions/runs/14164168826

Actual behavior

vcpkg fails to build a dependency and cmake complains that CMAKE_MAKE_PROGRAM is not set

Repro steps

Run the workflow on this repository:
https://github.com/LegalizeAdulthood/scintilla-example

[LegalizeAdulthood]

Hrm, maybe it's a problem with the vcpkg port as the included CMakeLists.txt for gperf specifies CMake version 3.5 which is now a hard failure.

So how do I revert the ubuntu image to use cmake 3.x instead of cmake 4.x until the vcpkg port is fixed?

[vidyasagarnimmagaddi]

Hi @LegalizeAdulthood ,
The issue will taken under #11926.
We have plans of pinning cmake version to 3.31.6 under #11933,
closing this issue.

[LegalizeAdulthood]

Hi, I see that ubuntu is now running 3.31.6, but the Windows runners are still running 4.0