spawn-fcgi.c.211: child exited with: 127, Unknown error: 127

# ./script/process/spawner fcgi -e staging -p 7000 -i 5
=> Starting FCGI dispatchers
Checking if something is already running on 0.0.0.0:7000...NO
Starting dispatcher on port: 0.0.0.0:7000
exec: /usr/local/sites/somesite/releases/20070723060143/public/dispatch.fcgi:
not found
spawn-fcgi.c.211: child exited with: 127, Unknown error: 127

fixed by changing dispatch.fcgi

#!/opt/local/bin/ruby

to

#!/usr/local/bin/ruby