diff --git a/Makefile.inc1 b/Makefile.inc1
index 256a6f81a137..8b54edf4c457 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -50,11 +50,14 @@
 .include <bsd.arch.inc.mk>
 .include <bsd.compiler.mk>
 
-# We must do lib/ and libexec/ before bin/, because if installworld
-# installs a new /bin/sh, the 'make' command will *immediately*
-# use that new version.  And the new (dynamically-linked) /bin/sh
-# will expect to find appropriate libraries in /lib and /libexec.
-#
+# We must do lib/ and libexec/ before bin/ in case of a mid-install error to
+# keep the users system reasonably usable.  For static->dynamic root upgrades,
+# we don't want to install a dynamic binary without rtld and the needed
+# libraries.  More commonly, for dynamic root, we don't want to install a
+# binary that requires a newer library version that hasn't been installed yet.
+# This ordering is not a guarantee though.  The only guarantee of a working
+# system here would require fine-grained ordering of all components based
+# on their dependencies.
 SRCDIR?=	${.CURDIR}
 .if defined(SUBDIR_OVERRIDE)
 SUBDIR=	${SUBDIR_OVERRIDE}