linecache fails to build with 1.9.3

[ghost]

When I want to install linecache19 I see this output 👍

sing warden (1.2.1)
Using devise (2.1.2)
Using jquery-rails (2.1.3)
Using libv8 (3.3.10.4)
Using ruby_core_source (0.1.5)
Installing linecache19 (0.5.12) with native extensions .............

Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.

    /usr/bin/ruby extconf.rb                                                                                                                             

checking for vm_core.h... no
/home/roelof/.gem/ruby/1.9.1/gems/ruby_core_source-0.1.5/lib/ruby_core_source.rb:39: Use RbConfig instead of obsolete and deprecated Config.
checking for vm_core.h... no
*** 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.

Roelof