Building Cyanogen's android source

After finished playing with the official master branch, I went on to check out Cyanogen's modified tree. After checking it out, I had to modify build/core/tasks/localize.mk to read

values_resource_files := $(-- $(foreach elem, $(all_resource_files), $(shell echo $(elem) | \
tr -s / | \
tr " " "\n" | \
grep -E "\/values[^/]*/(strings.xml|arrays.xml)$$" | \
grep -v -E -e "-[a-zA-Z]{2}[/\-]")))

because otherwise I would get an error saying too many arguments are passed to /bin/bash