cmake: cannot execute binary file in mac build

[ggould-tri]

What happened?

A CI build failed with the error:

[3:16:20 AM]  /bin/sh: /opt/homebrew/bin/cmake: cannot execute binary file
[3:16:20 AM]  make[1]: *** [CMakeFiles/drake_cxx_python.dir/all] Error 126
[3:16:20 AM]  make: *** [all] Error 2

This is described in slack as having happened twice before:
https://drakedevelopers.slack.com/archives/C270MN28G/p1736782108393449

This is not the first occurrence, so it stays open.

Version

current HEAD

What operating system are you using?

macOS 15 (Sequoia)

What installation option are you using?

compiled from source code using CMake

Relevant log output

[3:16:35 AM]  INFO: Found 1 target...
[3:16:35 AM]  Target @@drake+//:install up-to-date:
[3:16:35 AM]    /Users/admin/workspace/mac-arm-sequoia-clang-cmake-nightly-everything-release/_cmake_admin/_bazel_admin/d012f0c58e499e449def8b9401503fed/execroot/_main/bazel-out/darwin_arm64-opt/bin/external/drake+/install_test_commands
[3:16:35 AM]    /Users/admin/workspace/mac-arm-sequoia-clang-cmake-nightly-everything-release/_cmake_admin/_bazel_admin/d012f0c58e499e449def8b9401503fed/execroot/_main/bazel-out/darwin_arm64-opt/bin/external/drake+/install
[3:16:35 AM]  [10,058 / 10,058] no actions running
[3:16:36 AM]  INFO: Elapsed time: 1463.163s, Critical Path: 152.00s
[3:16:36 AM]  INFO: 10058 processes: 2 remote cache hit, 5131 internal, 4920 darwin-sandbox, 5 worker.
[3:16:36 AM]  INFO: Build completed successfully, 10058 total actions
[3:16:36 AM]  /bin/sh: /opt/homebrew/bin/cmake: cannot execute binary file
[3:16:36 AM]  make[1]: *** [CMakeFiles/drake_cxx_python.dir/all] Error 126
[3:16:36 AM]  make: *** [all] Error 2
[3:16:36 AM]  Error(s) when building project
[3:16:36 AM]     0 Compiler errors
[3:16:36 AM]     4 Compiler warnings
[3:16:39 AM]  -- *** Submitted to CDash with build id 1830504
[3:16:39 AM]  
[3:16:39 AM]    ------------------------------------------------------------------------------
[3:16:39 AM]    *** Disk usage for /tmp:
[3:16:39 AM]   Filesystem      Size    Used   Avail Capacity iused ifree %iused  Mounted on
[3:16:39 AM]  /dev/disk2s5   186Gi    23Gi   147Gi    14%    576k  1.5G    0%   /System/Volumes/Data
[3:16:39 AM]    ------------------------------------------------------------------------------
[3:16:39 AM]  
[3:16:39 AM]  
[3:16:39 AM]    ------------------------------------------------------------------------------
[3:16:39 AM]    *** CTest Result: FAILURE DURING CMAKE BUILD
[3:16:39 AM]    ------------------------------------------------------------------------------
[3:16:39 AM]    *** CDash URL: https://drake-cdash.csail.mit.edu/index.php?project=Drake&showfilters=1&filtercount=2&showfilters=1&filtercombine=and&field1=label&compare1=61&value1=jenkins-mac-arm-sequoia-clang-cmake-nightly-everything-release-24&field2=buildstarttime&compare2=84&value2=now
[3:16:39 AM]    ------------------------------------------------------------------------------
[3:16:39 AM]  
[3:16:39 AM]  CMake Error at /Users/admin/workspace/mac-arm-sequoia-clang-cmake-nightly-everything-release/ci/ctest_driver_script.cmake:154 (message):
[3:16:39 AM]    *** Return value set to NON-ZERO due to failure during build
[3:16:39 AM]

[BetsyMcPhail]

1/17 - mac-arm-sequoia-clang-cmake-nightly-release

[BetsyMcPhail]

1/19 - https://drake-jenkins.csail.mit.edu/job/mac-arm-sequoia-clang-cmake-nightly-everything-release/32
1/20 - https://drake-jenkins.csail.mit.edu/job/mac-arm-sequoia-clang-cmake-nightly-everything-release/33