# Mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h **URL:** \ **Category:** Community Edition\ **Created:** [February 2, 2017, 4:37pm UTC](https://discuss.dradis.com/t/mkmf-rb-cant-find-header-files-for-ruby-at-usr-lib-ruby-include-ruby-h/413 "2017-02-02T16:37:32Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![danielm](https://yyz1.discourse-cdn.com/flex035/user_avatar/discuss.dradis.com/danielm/32/88_2.png) [@danielm](https://discuss.dradis.com/u/danielm)\ **Post date:** [February 2, 2017, 4:37pm UTC](https://discuss.dradis.com/t/mkmf-rb-cant-find-header-files-for-ruby-at-usr-lib-ruby-include-ruby-h/413/1 "2017-02-02T16:37:32Z")
My dradis installation on Kali Linux Rolling release fails: > ~/dradis-ce# bundle install > Don’t run Bundler as root. Bundler can ask for sudo if it is needed, and installing your bundle as root will break this application for all non-root users on this > machine. > Fetching gem metadata from [https://rubygems.org/](https://rubygems.org/)… > Fetching additional metadata from [https://rubygems.org/](https://rubygems.org/)… > Resolving dependencies… > Using rake 12.0.0 > Gem::Ext::BuildError: ERROR: Failed to build gem native extension. > ``` > /usr/bin/ruby2.1 extconf.rb > > ``` > > mkmf.rb can’t find header files for ruby at /usr/lib/ruby/include/ruby.h > extconf failed, exit code 1 > Gem files will remain installed in /var/lib/gems/2.1.0/gems/RedCloth-4.3.1 for inspection. > Results logged to /var/lib/gems/2.1.0/extensions/x86-linux/2.1.0/RedCloth-4.3.1/gem\_make.out > An error occurred while installing RedCloth (4.3.1), and Bundler cannot continue. > Make sure that `gem install RedCloth -v '4.3.1'` succeeds before bundling. dpkg -l | grep ruby | grep dev shows me: > ii ruby-dev:i386 1:2.3.3 i386 Header files for compiling extension modules for Ruby (default version) > ii ruby1.8-dev 1.8.7.358-7 i386 Header files for compiling extension modules for the Ruby 1.8 > ii ruby2.3-dev:i386 2.3.3-1 i386 Header files for compiling extension modules for the Ruby 2.3 Obviously. current versions of ruby do not install a ruby.h file in /usr/lib/ruby/include/. Has anyone got Dradis running on Kali Linux? If so, how? ---
**Author:** ![rachkor](https://yyz1.discourse-cdn.com/flex035/user_avatar/discuss.dradis.com/rachkor/32/51_2.png) [@rachkor](https://discuss.dradis.com/u/rachkor)\ **Post date:** [February 7, 2017, 4:02pm UTC](https://discuss.dradis.com/t/mkmf-rb-cant-find-header-files-for-ruby-at-usr-lib-ruby-include-ruby-h/413/2 "2017-02-07T16:02:55Z")
Hi @danielm, I’m Rachael with the Dradis support team. Yes, we’ve got many users running Dradis on Kali Linux (myself included!). Let’s get this sorted out. First, I want to confirm a few details. Did you install using the instructions in our guide here? > **[Installing Dradis on Kali Linux | Dradis Framework](https://dradis.com/ce/documentation/install_kali.html)** > > Dradis Framework documentation to install Dradis Community Edition on Kali Linux. If you were using other instructions, let’s start with the guide above before moving on. > [@danielm](#): > > dpkg -l | grep ruby | grep dev shows me: > > ii ruby-dev:i386 1:2.3.3 i386 Header files for compiling extension modules for Ruby (default version)ii ruby1.8-dev 1.8.7.358-7 i386 Header files for compiling extension modules for the Ruby 1.8ii ruby2.3-dev:i386 2.3.3-1 i386 Header files for compiling extension modules for the Ruby 2.3 Otherwise, the latest version of `dradis-ce` is actually running Ruby v2.2 which isn’t listed in your output. Does `apt-get install ruby2.2-dev` resolve the error? ---
**Author:** ![danielm](https://yyz1.discourse-cdn.com/flex035/user_avatar/discuss.dradis.com/danielm/32/88_2.png) [@danielm](https://discuss.dradis.com/u/danielm)\ **Post date:** [February 7, 2017, 4:42pm UTC](https://discuss.dradis.com/t/mkmf-rb-cant-find-header-files-for-ruby-at-usr-lib-ruby-include-ruby-h/413/3 "2017-02-07T16:42:45Z")
Hi @rachkor I followed the guide you mentioned. Furthermore, apt-get update + apt-get install ruby2.2-dev says: E: Unable to locate package ruby2.2-dev E: Couldn’t find any package by glob ‘ruby2.2-dev’ E: Couldn’t find any package by regex ‘ruby2.2-dev’ It is strange. apt-cache search libruby tells me that only version 2.1 and 2.3 are available. ---
**Author:** ![danielm](https://yyz1.discourse-cdn.com/flex035/user_avatar/discuss.dradis.com/danielm/32/88_2.png) [@danielm](https://discuss.dradis.com/u/danielm)\ **Post date:** [February 14, 2017, 1:26pm UTC](https://discuss.dradis.com/t/mkmf-rb-cant-find-header-files-for-ruby-at-usr-lib-ruby-include-ruby-h/413/4 "2017-02-14T13:26:40Z")
Solution: apt-get remove ruby2.1 apt-get update apt-get --reinstall install ruby2.1 (fails → to old) gem install bundler → reinstalled the bundler. Afterwards, it found ruby2.3.