+4.1.2 (?? Nov 2022)
+[BUG FIX] Packages for which the flavor mechanism is newly introduced sometimes had their old packages remain as conflict.
+[BUG FIX] As of OS version 13, the specification change of grep(1) caused "empty (sub)expression" errors resulting in wrong processing at many points.
+[BUG FIX] The signal trapping mechanism showed a wrong behavior when the termination happened before option parsing.
4.1.1 (20 April 2022)
[IMPROVED] Adapt to the specification change of pkg-create(8) that the default extension of the package files become "pkg".
[IMPROVED] Adapt to the behavior change grep(1) as of 12.0-RELEASE that the case distinction is ineffective in some locale, which as a result prevented the execution by users in such locales.