File mozc-ninja-verbose-build.patch of Package mozc
diff --git a/src/build_mozc.py b/src/build_mozc.py
index 651dd30..3f817a5 100644
--- a/src/build_mozc.py
+++ b/src/build_mozc.py
@@ -964,7 +964,7 @@ def BuildOnLinux(options, targets, unused_original_directory_name):
short_basename = GetBuildShortBaseName(options,
GetMozcVersion().GetTargetPlatform())
make_command = ninja
- build_args = ['-C', '%s/%s' % (short_basename, options.configuration)]
+ build_args = ['-C', '%s/%s' % (short_basename, options.configuration), '-v']
RunOrDie([make_command] + build_args + target_names)