$ romtool build -o ../amiga600.rom -t kick -k -s 512 index.txt
Traceback (most recent call last):
File "/home/stepan/.local/bin/romtool", line 8, in <module>
sys.exit(main())
^^^^^^
File "/home/stepan/.local/lib/python3.11/site-packages/amitools/tools/romtool.py", line 740, in main
result = opts.cmd(opts)
^^^^^^^^^^^^^^
File "/home/stepan/.local/lib/python3.11/site-packages/amitools/tools/romtool.py", line 202, in do_build_cmd
rom_data = rb.build_rom()
^^^^^^^^^^^^^^
File "/home/stepan/.local/lib/python3.11/site-packages/amitools/rom/rombuilder.py", line 193, in build_rom
rom_data = RomBuilder.build_rom(self)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/home/stepan/.local/lib/python3.11/site-packages/amitools/rom/rombuilder.py", line 148, in build_rom
rom_data[off : off + n] = mod.get_data(addr)
^^^^^^^^^^^^^^^^^^
File "/home/stepan/.local/lib/python3.11/site-packages/amitools/rom/rombuilder.py", line 57, in get_data
return data + hdr
~~~~~^~~~~
TypeError: can only concatenate str (not "bytes") to str