build set error

./build set webserver nginx

[root@ns1 custombuild]# ./build set webserver nginx
./build: command substitution: line 97: syntax error near unexpected token `else'
./build: command substitution: line 97: `else'
./build: line 114: iw: command not found
cut: invalid option -- '_'
Try `cut --help' for more information.
./build: line 114: riabl: command not found
cut: invalid option -- '_'
Try `cut --help' for more information.
./build: command substitution: line 96: unexpected EOF while looking for matching `''
./build: command substitution: line 99: syntax error: unexpected end of file
./build: line 96: ^fT%l/etcuie ^fDie: No such file or directory
grep: WGET/local/directad/wget.: No such file or directory
grep: TAS_CONF=tad/oot.: No such file or directory
grep: CHOWN_CONF=OFTPD: No such file or directory
./build: line 115: iw: command not found
grep: Unmatched [ or [^
./build: line 267: syntax error near unexpected token `NT'
./build: line 267: `NT        " ]; tm1 $1: ${.txt'

wget -O /usr/local/directadmin/custombuild/build http://files1.directadmin.com/services/custombuild/2.0/custombuild/build