I am trying this on a fresh github pull, cc65 v 2.19, OSX Sonoma 14.6, Apple M3. Lzsa v1.4.1, Python v3.9.6. Exact command line that produced the error is below. The problem variable appears to be a valid hex number.

git diff --quiet && /bin/echo -n $( (git rev-parse --short=8 HEAD || /bin/echo "00000000") | tr '[:lower:]' '[:upper:]') > build/x16/../signature.bin \ || /bin/echo -n $( /bin/echo -n $(git rev-parse --short=7 HEAD || echo "0000000") | tr '[:lower:]' '[:upper:]'; /bin/echo -n '+') > build/x16/../signature.bin ld65 -C build/x16/cfg/kernal-x16.cfg build/x16/kernal/declare.o build/x16/kernal/vectors.o build/x16/kernal/kbdbuf.o build/x16/kernal/memory.o build/x16/kernal/lzsa.o build/x16/kernal/signature.o build/x16/kernal/cbm/editor.o build/x16/kernal/cbm/channel/channel.o build/x16/kernal/cbm/init.o build/x16/kernal/cbm/memory.o build/x16/kernal/cbm/nmi.o build/x16/kernal/cbm/irq.o build/x16/kernal/cbm/util.o build/x16/kernal/cbm/serial.o build/x16/kernal/x16/extapi.o build/x16/kernal/x16/65c816/interrupt.o build/x16/kernal/x16/65c816/stack.o build/x16/kernal/x16/65c816/extapi16.o build/x16/kernal/drivers/x16/x16.o build/x16/kernal/drivers/x16/memory.o build/x16/kernal/drivers/x16/screen.o build/x16/kernal/drivers/x16/ps2data.o build/x16/kernal/drivers/x16/ps2kbd.o build/x16/kernal/drivers/x16/ps2mouse.o build/x16/kernal/drivers/x16/joystick.o build/x16/kernal/drivers/x16/clock.o build/x16/kernal/drivers/x16/framebuffer.o build/x16/kernal/drivers/x16/sprites.o build/x16/kernal/drivers/x16/entropy.o build/x16/kernal/drivers/x16/beep.o build/x16/kernal/drivers/x16/i2c.o build/x16/kernal/drivers/x16/smc.o build/x16/kernal/drivers/x16/rtc.o build/x16/kernal/drivers/generic/softclock_timer.o build/x16/kernal/graph/graph.o build/x16/kernal/fonts/fonts.o build/x16/kernal/graph/console.o build/x16/kernal/graph/palette.o build/x16/kernal/ieee_switch.o -o build/x16/kernal.bin -m build/x16/kernal.map -Ln build/x16/kernal.sym \ -D __CHARLAE_LOAD__=$EE00 -D __CHARLAE2_LOAD__=$F100 -D __CHARPET_LOAD__=$C000 -D __CHARPET2_LOAD__=$D000 \ \ -D __CHARISO2_LOAD__=$D800 -D __CHARKAT_LOAD__=$F400 -D __CHARISO_LOAD__=$C800 -D __CHARCYR_LOAD__=$E800 \ \ -D __CHARANSI_LOAD__=$E000 -D __CHARCYR2_LOAD__=$EB00 \ ld65: Invalid definition: '__CHARLAE_LOAD__=' make: *** [build/x16/kernal.bin] Error 1