$ sudo rake install --trace
(in /Users/pro/code/merb)
** Invoke install (first_time)
** Execute install
rake package
(in /Users/pro/code/merb)
rm -r .config
rm -r ext/optimized_locking/Makefilepkg
rm -r .config
make
make: *** No rule to make target `ruby.h', needed by `optimized_locking.o'.  Stop.
rake aborted!
Command failed with status (2): [make]

(See full trace by running task with --trace)
rake aborted!
Command failed with status (1): [rake package]
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:722:in `sh'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:729:in `call'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:729:in `sh'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:812:in `sh'
/Users/pro/code/merb/rakefile:86
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in `call'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in `execute'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in `each'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:387:in `execute'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:357:in `invoke'
/opt/local/lib/ruby/1.8/thread.rb:135:in `synchronize'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:350:in `invoke'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in `run'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in `each'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/lib/rake.rb:1906:in `run'
/opt/local/lib/ruby/gems/1.8/gems/rake-0.7.1/bin/rake:7
/opt/local/bin/rake:18:in `load'
/opt/local/bin/rake:18