# Help with setting up discourse An error occurred while installing xorcist (1.1.2), and Bundler cannot continue

**URL:** <https://meta.discourse.org/t/help-with-setting-up-discourse-an-error-occurred-while-installing-xorcist-1-1-2-and-bundler-cannot-continue/209741>\
**Category:** Self-hosting\
**Created:** [November 20, 2021, 11:55pm UTC](https://meta.discourse.org/t/help-with-setting-up-discourse-an-error-occurred-while-installing-xorcist-1-1-2-and-bundler-cannot-continue/209741 "2021-11-20T23:55:47Z")\
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**Author:** ![PowerPlays](https://sea3.discourse-cdn.com/meta/user_avatar/meta.discourse.org/powerplays/32/240626_2.png) [@PowerPlays](https://meta.discourse.org/u/PowerPlays)\
**Post date:** [November 20, 2021, 11:55pm UTC](https://meta.discourse.org/t/help-with-setting-up-discourse-an-error-occurred-while-installing-xorcist-1-1-2-and-bundler-cannot-continue/209741/1 "2021-11-20T23:55:47Z")

</div>

When I do bundle install I get this error: An error occurred while installing xorcist (1.1.2), and Bundler cannot continue.

Can someone help.

Here is the docs Im following currently:

> [@Install Discourse on Ubuntu or Debian for Development](https://meta.discourse.org/t/beginners-guide-to-install-discourse-on-ubuntu-for-development/14727):
>
> warning This guide covers installation instructions in a development environment. For a production guide see: [Install Discourse in production with the official supported instructions](https://meta.discourse.org/t/how-to-install-discourse-in-production/142537) So you want to set up Discourse on Ubuntu or Debian to hack on and develop with? We’ll assume that you work locally and don’t have Ruby/Rails/Postgres/Redis installed on your Ubuntu or Debian system. Let’s begin! Requirements We suggest having at least 4 GB RAM and 2 CPU cores. Current compatibility: O…

> [@Install Discourse on Windows for development](https://meta.discourse.org/t/beginners-guide-to-install-discourse-on-windows-10-for-development/75149):
>
> information_source This tutorial has been tested on Windows 10 and 11. To set up a development environment for Discourse on Windows, you can do it using [Windows Subsystem for Linux](https://msdn.microsoft.com/en-us/commandline/wsl/install-win10) feature. This setup requires the WSL 2 installation. It is only available in Windows 10 builds 18917 or higher. We’ll assume that you already installed [Windows Subsystem for Linux 2 (Ubuntu)](https://docs.microsoft.com/en-us/windows/wsl/install) on your Windows 10 system. WARNING: Install Ubuntu 18.04, and not 20.04 since some installations will fail on 20.04. For m…

here is the full error if that helps.

```plaintext
In Gemfile:
  unf was resolved to 0.1.4, which depends on
    unf_ext

Gem::Ext::BuildError: ERROR: Failed to build gem native extension.

    current directory: /var/lib/gems/2.7.0/gems/xorcist-1.1.2/ext/xorcist
/usr/bin/ruby2.7 -I /usr/lib/ruby/2.7.0 -r ./siteconf20211120-12641-1468e8.rb extconf.rb
mkmf.rb can't find header files for ruby at /usr/lib/ruby/include/ruby.h

You might have to install separate package for the ruby development
environment, ruby-dev or ruby-devel for example.

extconf failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.7.0/gems/xorcist-1.1.2 for inspection.
Results logged to /var/lib/gems/2.7.0/extensions/x86_64-linux/2.7.0/xorcist-1.1.2/gem_make.out

  /usr/lib/ruby/2.7.0/rubygems/ext/builder.rb:97:in `run'
  /usr/lib/ruby/2.7.0/rubygems/ext/ext_conf_builder.rb:48:in `block in build'
  /usr/lib/ruby/2.7.0/tempfile.rb:291:in `open'
  /usr/lib/ruby/2.7.0/rubygems/ext/ext_conf_builder.rb:30:in `build'
  /usr/lib/ruby/2.7.0/rubygems/ext/builder.rb:167:in `block in build_extension'
  /usr/lib/ruby/2.7.0/rubygems/ext/builder.rb:163:in `synchronize'
  /usr/lib/ruby/2.7.0/rubygems/ext/builder.rb:163:in `build_extension'
  /usr/lib/ruby/2.7.0/rubygems/ext/builder.rb:208:in `block in build_extensions'
  /usr/lib/ruby/2.7.0/rubygems/ext/builder.rb:205:in `each'
  /usr/lib/ruby/2.7.0/rubygems/ext/builder.rb:205:in `build_extensions'
  /usr/lib/ruby/2.7.0/rubygems/installer.rb:844:in `build_extensions'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/rubygems_gem_installer.rb:71:in `build_extensions'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/rubygems_gem_installer.rb:28:in `install'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/source/rubygems.rb:200:in `install'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/installer/gem_installer.rb:54:in `install'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/installer/gem_installer.rb:16:in `install_from_spec'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/installer/parallel_installer.rb:186:in `do_install'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/installer/parallel_installer.rb:177:in `block in worker_pool'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/worker.rb:62:in `apply_func'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/worker.rb:57:in `block in process_queue'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/worker.rb:54:in `loop'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/worker.rb:54:in `process_queue'
  /var/lib/gems/2.7.0/gems/bundler-2.2.31/lib/bundler/worker.rb:91:in `block (2 levels) in create_threads'

An error occurred while installing xorcist (1.1.2), and Bundler cannot continue.

In Gemfile:
  xorcist

```

---

_[View the full topic](https://meta.discourse.org/t/help-with-setting-up-discourse-an-error-occurred-while-installing-xorcist-1-1-2-and-bundler-cannot-continue/209741)._