https://tbpl.mozilla.org/php/getParsedLog.php?id=17011402&tree=Try etc.: Mock Version: 1.0.3 INFO: Mock Version: 1.0.3 INFO: Mock Version: 1.0.3 DEBUG: rootdir = /builds/mock_mozilla/mozilla-centos6-i386/root/ DEBUG: resultdir = /builds/mock_mozilla/mozilla-centos6-i386/result INFO: calling preinit hooks INFO: enabled root cache DEBUG: ensuring that dir exists: /builds/mock_mozilla/cache/mozilla-centos6-i386/root_cache/ State Changed: unpacking root cache DEBUG: Executing command: ['tar', '--use-compress-program', 'pigz', '-xf', '/builds/mock_mozilla/cache/mozilla-centos6-i386/root_cache/cache.tar.gz', '-C', '/builds/mock_mozilla/mozilla-centos6-i386/root/'] DEBUG: pigz abort: corrupted input -- invalid deflate data: <stdin> DEBUG: tar: Unexpected EOF in archive DEBUG: tar: Unexpected EOF in archive DEBUG: tar: Error is not recoverable: exiting now DEBUG: Child return code was: 2 ERROR: Command failed. See logs for output. # ['tar', '--use-compress-program', 'pigz', '-xf', '/builds/mock_mozilla/cache/mozilla-centos6-i386/root_cache/cache.tar.gz', '-C', '/builds/mock_mozilla/mozilla-centos6-i386/root/'] DEBUG: kill orphans program finished with exit code 2 Which catlee has already fixed, the cure being "mock_mozilla -v -r mozilla-centos6-i386 --scrub=all"