Cannot cmake box86 on arm cpu, unrecognized option '-marm' - cmake

Question

I'm trying to install box86 with cmake in a script, the error I get in console is:
Scanning dependencies of target WRAPPERS
Scanning dependencies of target dynarec_arm
[ 0%] Built target PRINTER
[ 0%] Generating ../src/wrapped/generated/functions_list.txt
[ 0%] Building C object CMakeFiles/dynarec_arm.dir/src/dynarec/dynablock.c.o
[ 1%] Building C object CMakeFiles/dynarec_arm.dir/src/dynarec/dynarec_arm.c.o
cc: error: unrecognized command line option '-marm'; did you mean '-fasm'?
make[2]: *** [CMakeFiles/dynarec_arm.dir/build.make:76: CMakeFiles/dynarec_arm.dir/src/dynarec/dynarec_arm.c.o] Error 1
make[2]: *** Waiting for unfinished jobs....
cc: error: unrecognized command line option '-marm'; did you mean '-fasm'?
make[2]: *** [CMakeFiles/dynarec_arm.dir/build.make:63: CMakeFiles/dynarec_arm.dir/src/dynarec/dynablock.c.o] Error 1
[ 1%] Building C object CMakeFiles/dynarec_arm.dir/src/dynarec/dynarec_arm_functions.c.o
cc: error: unrecognized command line option '-marm'; did you mean '-fasm'?
make[2]: *** [CMakeFiles/dynarec_arm.dir/build.make:89: CMakeFiles/dynarec_arm.dir/src/dynarec/dynarec_arm_functions.c.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:73: CMakeFiles/dynarec_arm.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
Detected same build as last run, skipping
[ 1%] Built target WRAPPERS
make: *** [Makefile:163: all] Error 2
My script for this installation is:
git clone https://github.com/ptitSeb/box86
cd box86
echo 'cd box86'
mkdir build; cd build; cmake .. -DARM_DYNAREC=ON -DCMAKE_BUILD_TYPE=RelWithDebInfo; make -j$(nproc)
exit
I'm not sure what this error means since I never specified -marm as an option... where is this coming from?