## Summary - preserve FIFOs and character/block device files when copying sources into the build directory - use `file_utils.copy` in the build-step source copy path - add unit tests for copying special files and re-enable the integration test for #1458 ## Testing - pytest -q tests/unit/utils/test_file_utils.py -k "TestCopy" - sudo -E .venv/bin/pytest -q tests/unit/utils/test_file_utils.py -k "test_copy_chardev or test_copy_blockdev or test_copy_fifo" -rs - sudo -E .venv/bin/pytest -q tests/integration/executor/test_organize.py -k special_files -rs Closes #1458