You are now in the directory for the port "math/ruby-gsl" (package name "ruby-gsl-0.2.3").
This is the one-line description for this port:
A Ruby extension library for GSL (GNU Scientific Library)
Please read the "description file" for a longer description.
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This port requires package(s) "gsl-1.2 ruby-1.6.8" to build.
This port requires package(s) "gsl-1.2 ruby-1.6.8" to run.