Chicken Scheme failures

[Watson Ladd]

The chicken scheme port has a broken chicken-setup
typing chicken-setup amb results in:
$chicken-setup amb

The extension amb does not exist.
Do you want to download it ? (yes/no/abort) [yes]
downloading catalog ...
downloading catalog from www.call-with-current-continuation.org ...
downloading amb.egg from (www.call-with-current-continuation.org eggs/
80) ...
  creating directory `amb.egg.dir'
  gunzip -c ../amb.egg | tar xvf -
amb.scm
egg.jpg
amb-base.scm
amb.html
amb.setup
amb-demo.scm
  /opt/local/bin/csc -feature compiling-extension -O2 -d0 -check-imports
-s amb-base.scm -o amb-base.so -emit-exports amb.exports
csc: invalid option `-check-imports'
Error: shell invocation failed with non-zero return status
"/opt/local/bin/csc -feature compiling-extension -O2 -d0 -check-imports
-s amb-...
64

I hit enter for yes. Any help would be greatly appreciated.
Thanks,
Watson Ladd
-- 
They who would give up an essential liberty for temporary security,
 deserve neither liberty or security
--Benjamin Franklin

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