mkdir /tmp/foo
chicken-install -init /tmp/foo
export CHICKEN_REPOSITORY=/tmp/foo

#works
chicken-install matchable

#does not
chicken-install setup-helper

#error: cp: cannot create regular file ‘/usr/share/chicken/setup-#helper.scm’: Permission denied
#Warning: cannot copy to Chicken Home: must use CHICKEN_INCLUDE_PATH #when installing an egg using "setup-helper"