postinstall error - can't find /etc/motd

[Paul Goyette <paul%vps1.whooppee.com@localhost>]

I was just updating from 7.99.15 to 7.99.18 and I got the following 
error.  ((Lines longer than 80 chars have been manually wrapped))

# ./build.sh -T /build/netbsd-local/tools/x86_64/amd64 \
-D /build/netbsd-local/dest/amd64 -O /build/netbsd-local/obj/amd64 \
-R /build/netbsd-local/release -V RELEASEMACHINEDIR=amd64 -m amd64 \
-j6 -x install=/
...
makedev check:
motd check:
eval: cannot open /build/netbsd-local/src/etc/motd: no such file
        Bug reporting messages do not seem to match the installed release
mtree check:
named check:
...
obsolete check:
        Remove obsolete file ///usr/include/miscfs/syncfs/syncfs.h
        Remove obsolete directory ///usr/include/miscfs/syncfs
        Remove obsolete file ///usr/include/dev/iscsi/iscsi_test.h
        Remove obsolete file ///usr/include/dev/iscsi/iscsi_perf.h
        Remove obsolete file ///usr/lib/libintl.so.1.0
        Remove obsolete file ///usr/lib/i386/libintl.so.1.0
postinstall checks passed: bluetooth ddbonpanic defaults dhcpcd \
dhcpcdrundir envsys fontconfig gid gpio hosts iscsi makedev mtree \
named pam periodic pf pwd_mkdb rc ssh wscons x11 xkb uid varrwho \
tcpdumpchroot atf catpages ptyfsoldnodes varshm
postinstall checks failed: motd obsolete
To fix, run:
    /bin/sh /build/netbsd-local/src/usr.sbin/postinstall/postinstall -s /build/netbsd-local/src -d // fix motd obsolete
Note that this may overwrite local changes.
   ================================


When I manually run postinstall as directed (to fix the errors), I get

# /bin/sh /build/netbsd-local/src/usr.sbin/postinstall/postinstall \
-s /build/netbsd-local/src -d // fix motd obsolete
Source directory: /build/netbsd-local/src
Target directory: //
motd fix:
eval: cannot open /build/netbsd-local/src/etc/motd: no such file
eval: cannot open /build/netbsd-local/src/etc/motd: no such file
obsolete fix:
        Removed obsolete file ///usr/include/miscfs/syncfs/syncfs.h
        Removed obsolete directory ///usr/include/miscfs/syncfs
        Removed obsolete file ///usr/include/dev/iscsi/iscsi_test.h
        Removed obsolete file ///usr/include/dev/iscsi/iscsi_perf.h
        Removed obsolete file ///usr/lib/libintl.so.1.0
        Removed obsolete file ///usr/lib/i386/libintl.so.1.0
postinstall fixes passed: motd obsolete
postinstall fixes failed:


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| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:       |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at whooppee.com    |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at netbsd.org  |
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