Circonflex install

Installing bourbon (1.3.6)
Installing bcrypt-ruby (3.0.1)
Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

        /opt/boxen/rbenv/versions/1.9.2-p320/bin/ruby extconf.rb
creating Makefile

make
/opt/boxen/homebrew/bin/gcc-4.2 -I. -I/opt/boxen/rbenv/versions/1.9.2-p320/include/ruby-1.9.1/x86_64-darwin12.2.0 -I/opt/boxen/rbenv/versions/1.9.2-p320/include/ruby-1.9.1/ruby/backward -I/opt/boxen/rbenv/versions/1.9.2-p320/include/ruby-1.9.1 -I. -I'/opt/boxen/rbenv/versions/1.9.2-p320/include'  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -fno-common -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-missing-field-initializers -Wshorten-64-to-32 -Wno-long-long  -pipe  -o bcrypt_ext.o -c bcrypt_ext.c
make: /opt/boxen/homebrew/bin/gcc-4.2: No such file or directory
make: *** [bcrypt_ext.o] Error 1


Gem files will remain installed in /opt/boxen/rbenv/versions/1.9.2-p320/lib/ruby/gems/1.9.1/gems/bcrypt-ruby-3.0.1 for inspection.
Results logged to /opt/boxen/rbenv/versions/1.9.2-p320/lib/ruby/gems/1.9.1/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out

An error occurred while installing bcrypt-ruby (3.0.1), and Bundler cannot continue.
Make sure that `gem install bcrypt-ruby -v '3.0.1'` succeeds before bundling.
➜  circonflex git:(master) Cgem install bcrypt-ruby -v '3.0.1'
➜  circonflex git:(master) gem install bcrypt-ruby -v '3.0.1'
Building native extensions.  This could take a while...
ERROR:  Error installing bcrypt-ruby:
	ERROR: Failed to build gem native extension.

        /opt/boxen/rbenv/versions/1.9.2-p320/bin/ruby extconf.rb
creating Makefile

make
/opt/boxen/homebrew/bin/gcc-4.2 -I. -I/opt/boxen/rbenv/versions/1.9.2-p320/include/ruby-1.9.1/x86_64-darwin12.2.0 -I/opt/boxen/rbenv/versions/1.9.2-p320/include/ruby-1.9.1/ruby/backward -I/opt/boxen/rbenv/versions/1.9.2-p320/include/ruby-1.9.1 -I. -I'/opt/boxen/rbenv/versions/1.9.2-p320/include'  -D_XOPEN_SOURCE -D_DARWIN_C_SOURCE   -fno-common -O3 -ggdb -Wextra -Wno-unused-parameter -Wno-parentheses -Wpointer-arith -Wwrite-strings -Wno-missing-field-initializers -Wshorten-64-to-32 -Wno-long-long  -pipe  -o bcrypt_ext.o -c bcrypt_ext.c
make: /opt/boxen/homebrew/bin/gcc-4.2: No such file or directory
make: *** [bcrypt_ext.o] Error 1


Gem files will remain installed in /opt/boxen/rbenv/versions/1.9.2-p320/lib/ruby/gems/1.9.1/gems/bcrypt-ruby-3.0.1 for inspection.
Results logged to /opt/boxen/rbenv/versions/1.9.2-p320/lib/ruby/gems/1.9.1/gems/bcrypt-ruby-3.0.1/ext/mri/gem_make.out
➜  circonflex git:(master) rbenv -versions