Providing the main.c and Makefile I'm using, but even the bundled z88dk sample projects generate the same error (with empty bin files)

gistfile1.txt

zcc +zx -vn  -create-app -Cz"--sna" -v main.c

PROCESSING main.c
z88dk-ucpp -iquote"." -D__Z88DK -D__SPECTRUM -DSPECTRUM -D__SPECTRUM__ -D__Z80 -DZ80  -DSCCZ80 -DSMALL_C -D__SCCZ80 -isystem"C:\z88dk\lib\config\..\..\/include"    "main.c" "D:\WinTemp\zcc0000129C139A2.i2"
z88dk-zpragma -sccz80 -zcc-opt=D:\WinTemp\zcc0000129C139A3/zcc_opt.def < "D:\WinTemp\zcc0000129C139A2.i2" > "D:\WinTemp\zcc0000129C139A2.i"
sccz80  -ext=opt -mz80 -zcc-opt=D:\WinTemp\zcc0000129C139A3/zcc_opt.def -standard-escape-chars   "D:\WinTemp\zcc0000129C139A2.i" -o "D:\WinTemp\zcc0000129C139A2.opt"
z88dk-copt  "C:\z88dk\lib\config\..\..\/lib/z80rules.9" < "D:\WinTemp\zcc0000129C139A2.opt" > "D:\WinTemp\zcc0000129C139A2.op1"
z88dk-copt  "C:\z88dk\lib\config\..\..\/lib/z80rules.2" < "D:\WinTemp\zcc0000129C139A2.op1" > "D:\WinTemp\zcc0000129C139A2.opt"
z88dk-copt  "C:\z88dk\lib\config\..\..\/lib/z80rules.1" < "D:\WinTemp\zcc0000129C139A2.opt" > "D:\WinTemp\zcc0000129C139A2.asm"
type "D:\WinTemp\zcc0000129C139A2.asm" >> "D:\WinTemp\zcc0000129C139A2.tmp"
type "D:\WinTemp\zcc0000129C139A2.tmp" >> "D:\WinTemp\zcc0000129C139A2.asm"
z80asm -I"C:\z88dk\lib\config\..\..\\lib\target\zx\def" -I"D:\WinTemp\zcc0000129C139A3" -D__SCCZ80  -s  -mz80 -I"C:\z88dk\lib\config\..\..\/lib" "D:\WinTemp\zcc0000129C139A2.asm"

PROCESSING C:\z88dk\lib\config\..\..\\lib\target\zx\classic\spec_crt0.asm
type "C:\z88dk\lib\config\..\..\\lib\target\zx\classic\spec_crt0.asm" >> "D:\WinTemp\zcc0000129C139A4.asm"
type "D:\WinTemp\zcc0000129C139A4.asm" >> "D:\WinTemp\zcc0000129C139A4.tmp"
type "D:\WinTemp\zcc0000129C139A4.tmp" >> "D:\WinTemp\zcc0000129C139A4.asm"
WILL ACT AS CRT

GENERATING OUTPUT

PROCESSING CRT
z80asm -I"C:\z88dk\lib\config\..\..\\lib\target\zx\def" -I"D:\WinTemp\zcc0000129C139A3" -D__SCCZ80  -s  -mz80 -I"C:\z88dk\lib\config\..\..\/lib" -I"C:\z88dk\lib\config\..\..\\lib\target\zx\classic"  "D:\WinTemp\zcc0000129C139A4.asm"

z80asm -mz80 -b -d  -o"a.bin" -m -s -L.   -I"D:\WinTemp\zcc0000129C139A3" -D__SCCZ80 -L"C:\z88dk\lib\config\..\..\/lib/clibs" -I"C:\z88dk\lib\config\..\..\/lib" -lzx_clib -l"z80_crt0"     "D:\WinTemp\zcc0000129C139A4.o" "D:\WinTemp\zcc0000129C139A2.o"
appmake --sna +zx  -b "a.bin" -c "D:\WinTemp\zcc0000129C139A4"
zx: Error: ORG address cannot be determined
Building application code failed
make: *** [Makefile:5: main.sna] Error 1

main.c

int main() {
        return -1;
}

Makefile

ZCC=zcc +zx -vn  $(CREATE_APP) -v
CREATE_APP=-create-app -Cz"--sna"

main.sna:
        $(ZCC) main.c

Provided the main.c and Makefile I'm using, but even the bundled z88dk sample projects generate the same error (with empty bin files).

This is Windows 10, by the way. 1909. z88dk is the latest nightly timestamped "2020-08-18 03:28".