ctfmerge i/o error

[Patrick Welche <prlw1%talktalk.net@localhost>]

While trying to build a release, I am having trouble trying to make
GENERIC_KASLR.debug, so manually, I tried

cd /usr/obj/sys/arch/amd64/compile.amd64/GENERIC_KASLR
make clean
make dependall

and repeatedly get

#      link  GENERIC_KASLR/netbsd
ld -Map netbsd.map --cref -T netbsd.ldscript -Ttext 0xffffffff80200000 -e start --split-by-file=0x100000 -r -d -X -o netbsd ${SYSTEM_OBJ:[@]:Nswapnetbsd.o} ${EXTRA_OBJ} vers.o swapnetbsd.o
NetBSD 9.99.108 (GENERIC_KASLR) #4: Wed Dec 14 10:40:49 CST 2022
   text    data     bss     dec     hex filename
21686890         686136  466512 22839538        15c80f2 netbsd
ERROR: ctfmerge: netbsd.ctf: Cannot finalize temp file: I/O error: Operation already in progress
*** Error code 1

which is not a message I recognize. FWIW /usr/obj is a ZFS filesystem, but
this hasn't caused trouble so far...

Thoughts?


Cheers,

Patrick