Can't install on 1.9.3-p374 or 1.9.3-p385

[samuelkadolph]

$ gem install debugger-linecache
Building native extensions.  This could take a while...
ERROR:  Error installing debugger-linecache:
    ERROR: Failed to build gem native extension.

        /Users/samuelkadolph/.rvm/rubies/ruby-1.9.3-p385-perf/bin/ruby extconf.rb
checking for vm_core.h... no
checking for vm_core.h... no
Makefile creation failed
**************************************************************************
No source for ruby-1.9.3-p385 provided with debugger-ruby_core_source gem.
**************************************************************************
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

[cldwalker]

Just released with p385 headers. Closing. I can reopen if needed.

[JacobEvelyn]

Still not working; same error as described above.