Build failure for NetBSD-HEAD on amd64

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

With sources updated on 2020-12-12 at 01:29:10 UTC, I am getting the
following build error:

...
install ===> tests/lib/libossaudio
#   install  /build/netbsd-compat/dest/amd64/usr/tests/lib/libossaudio/Atffile
/build/netbsd-compat/tools/x86_64/amd64/bin/x86_64--netbsd-install -U -M /build/netbsd-compat/dest/amd64/METALOG -D /build/netbsd-compat/dest/amd64 -h sha256 -N /build/netbsd-compat/src_ro/etc -c  -r  -o root  -g wheel  -m 444   Atffile /build/netbsd-compat/dest/amd64/usr/tests/lib/libossaudio/Atffile
x86_64--netbsd-install: /build/netbsd-compat/dest/amd64/usr/tests/lib/libossaudio/Atffile.inst.NSIKiN: mkstemp: No such file or directory
*** [/build/netbsd-compat/dest/amd64/usr/tests/lib/libossaudio/Atffile] Error code 1

nbmake[7]: stopped in /build/netbsd-compat/src_ro/tests/lib/libossaudio
1 error



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