Issue #20560 has been updated by MSP-Greg (Greg L). I've maintained a GH repo that outputs build information about Ruby versions available on GitHub Actions. The most recent CI run is at: https://github.com/MSP-Greg/github-actions-ruby-info/actions/runs/9583386691 See the bottom of the 'Ruby Info' step, which shows installed gems. Check any of the head MRI builds on any OS, and all are missing power_assert. ---------------------------------------- Bug #20560: make install - skipped bundled gems - minor issue https://bugs.ruby-lang.org/issues/20560#change-108862 * Author: MSP-Greg (Greg L) * Status: Open * Backport: 3.1: UNKNOWN, 3.2: UNKNOWN, 3.3: UNKNOWN ---------------------------------------- See most recent job: https://github.com/ruby/ruby/actions/runs/9389674968/job/25857719333#step:9:... Which is logging the following during `make install`: ``` skipped bundled gems: power_assert-2.0.4dev.gem not found in bundled_gems syslog-0.1.2.gem not found in bundled_gems ``` Not sure what the correct versioning should be. Or, should bundled gems use 'dev' versions, etc... -- https://bugs.ruby-lang.org/