I'm trying to install BG1 with the Linux installer and when the installation is finished I get this message


start.sh: 6: Bad substitution
start.sh: 8: source: not found
start.sh: 11: get_gameinfo: not found
start.sh: 12: get_gameinfo: not found
start.sh: 13: get_gameinfo: not found
start.sh: 28: define_option: not found
start.sh: 31: standard_options: not found

What could it be due to?