title: Using jekyll with gitlab pages, it says when it's deploying the website with gitlab CI that theme could not be found, and I already installed it
body: <h2>My objetive</h2>
  
  <p>To have a repository with the jekyll site configuration files (but not the _site), and each time I push to the repository, a gitlab pipeline runs. With that pipeline, the site is build with Jekyll (I'm using this theme <a href="https://github.com/mmistakes/jekyll-theme-basically-basic" rel="nofollow noreferrer">https://github.com/mmistakes/jekyll-theme-basically-basic</a>)</p>
  
  <h2>A quick view on the essential files which I'm troubling with</h2>
  
  <p>Gemfile</p>
  
  <pre><code>source "https://rubygems.org"
  # Hello! This is where you manage which Jekyll version is used to run.
  # When you want to use a different version, change it below, save the
  # file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
  #
  #     bundle exec jekyll serve
  #
  # This will help ensure the proper Jekyll version is running.
  # Happy Jekylling!
  gem "jekyll", "~&gt; 4.0.0"
  # This is the default theme for new Jekyll sites. You may change this to anything you like.
  
  #######
  #THEMES
  #######
  
  # MANUALLY COMMENTED
  #gem "minima", "~&gt; 2.5"
  # New content by me
  #gem "jekyll-theme-basically-basic"
  #gem 'jekyll-theme-basically-basic', '~&gt; 1.4', '&gt;= 1.4.4'
  
  ########################
  
  
  
  # If you want to use GitHub Pages, remove the "gem "jekyll"" above and
  # uncomment the line below. To upgrade, run `bundle update github-pages`.
  # gem "github-pages", group: :jekyll_plugins
  # If you have any plugins, put them here!
  group :jekyll_plugins do
    gem "jekyll-feed", "~&gt; 0.12"
  end
  
  # Windows and JRuby does not include zoneinfo files, so bundle the tzinfo-data gem
  # and associated library.
  install_if -&gt; { RUBY_PLATFORM =~ %r!mingw|mswin|java! } do
    # gem "tzinfo", "~&gt; 1.2"
    # gem "tzinfo-data"
  end
  
  # Performance-booster for watching directories on Windows
  # gem "wdm", "~&gt; 0.1.1", :install_if =&gt; Gem.win_platform?
  
  </code></pre>
  
  <p>Maybe you are wondering why so many comments there. That's because I was having problems with the deployment in gitlab, and I found out that If I installed them in the .gitlab-ci.yml, I wouldn't encounter those problems.  </p>
  
  <p>_config.yml</p>
  
  <pre><code># Welcome to Jekyll!
  #
  # This config file is meant for settings that affect your whole blog, values
  # which you are expected to set up once and rarely edit after that. If you find
  # yourself editing this file very often, consider using Jekyll's data files
  # feature for the data you need to update frequently.
  #
  # For technical reasons, this file is *NOT* reloaded automatically when you use
  # 'bundle exec jekyll serve'. If you change this file, please restart the server process.
  #
  # If you need help with YAML syntax, here are some quick references for you: 
  # https://learn-the-web.algonquindesign.ca/topics/markdown-yaml-cheat-sheet/#yaml
  # https://learnxinyminutes.com/docs/yaml/
  #
  # Site settings
  # These are used to personalize your new site. If you look in the HTML files,
  # you will see them accessed via {{ site.title }}, {{ site.email }}, and so on.
  # You can create any custom variable you would like, and they will be accessible
  # in the templates via {{ site.myvariable }}.
  
  lang: es-ES
  title: La casa de los titanes
  email: adristudy@gmail.com
  description: &gt;- # this means to ignore newlines until "baseurl:"
    Write an awesome description for your new site here. You can edit this
    line in _config.yml. It will appear in your document head meta (for
    Google search results) and in your feed.xml site description.
  baseurl: "" # the subpath of your site, e.g. /blog
  url: "" # the base hostname &amp; protocol for your site, e.g. http://example.com
  author:
    name: Adrián Jaramillo
  twitter_username: sample
  github_username: sample
  
  # Build settings
  theme: jekyll-theme-basically-basic
  #theme: minima
  plugins:
    - jekyll-feed
  
  # Exclude from processing.
  # The following items will not be processed, by default.
  # Any item listed under the `exclude:` key here will be automatically added to
  # the internal "default list".
  #
  # Excluded items can be processed by explicitly listing the directories or
  # their entries' file path in the `include:` list.
  #
  # exclude:
  #   - .sass-cache/
  #   - .jekyll-cache/
  #   - gemfiles/
  #   - Gemfile
  #   - Gemfile.lock
  #   - node_modules/
  #   - vendor/bundle/
  #   - vendor/cache/
  #   - vendor/gems/
  #   - vendor/ruby/
  
  # New content by me 
  # theme: jekyll-theme-basically-basic
  
  </code></pre>
  
  <p>.gitlab-ci.yml</p>
  
  <pre><code>image: ruby:2.5
  
  pages:
    script:
    - gem install jekyll
    #- gem install minima
    - gem install jekyll-theme-basically-basic -v 1.4.1
    - gem install tzinfo -v 1.2.2
    - gem install tzinfo-data
    - bundle install
    - jekyll build --trace -d public/
    artifacts:
      paths:
      - public
    only:
    - master
  
  </code></pre>
  
  <h2>Furthermore, you have here the public repository</h2>
  
  <p><a href="https://gitlab.com/unveiled_adri/jekyll_project" rel="nofollow noreferrer">https://gitlab.com/unveiled_adri/jekyll_project</a></p>
  
  <h2>And of course, the whole process of deployment on the docker vm of gitlab, which shows the error</h2>
  
  <pre><code>Running with gitlab-runner 12.3.0 (a8a019e0)
    on docker-auto-scale ed2dce3a
  Using Docker executor with image ruby:2.5 ...
  Pulling docker image ruby:2.5 ...
  Using docker image sha256:092689b795107d1b2eadb82494acf4764191baa0aa5bf4673b8ee2a50f70ba97 for ruby:2.5 ...
  Running on runner-ed2dce3a-project-14628881-concurrent-0 via runner-ed2dce3a-srm-1571178048-5f8825dc...
  Fetching changes with git depth set to 50...
  Initialized empty Git repository in /builds/unveiled_adri/jekyll_project/.git/
  Created fresh repository.
  From https://gitlab.com/unveiled_adri/jekyll_project
   * [new ref]         refs/pipelines/89060084 -&gt; refs/pipelines/89060084
   * [new branch]      master                  -&gt; origin/master
  Checking out 745d8811 as master...
  
  Skipping Git submodules setup
  $ gem install jekyll
  Successfully installed public_suffix-4.0.1
  Successfully installed addressable-2.7.0
  Successfully installed colorator-1.1.0
  Building native extensions. This could take a while...
  Successfully installed http_parser.rb-0.6.0
  Building native extensions. This could take a while...
  Successfully installed eventmachine-1.2.7
  Successfully installed em-websocket-0.5.1
  Successfully installed concurrent-ruby-1.1.5
  
  HEADS UP! i18n 1.1 changed fallbacks to exclude default locale.
  But that may break your application.
  
  Please check your Rails app for 'config.i18n.fallbacks = true'.
  If you're using I18n (&gt;= 1.1.0) and Rails (&lt; 5.2.2), this should be
  'config.i18n.fallbacks = [I18n.default_locale]'.
  If not, fallbacks will be broken in your app by I18n 1.1.x.
  
  For more info see:
  https://github.com/svenfuchs/i18n/releases/tag/v1.1.0
  
  Successfully installed i18n-1.7.0
  Building native extensions. This could take a while...
  Successfully installed ffi-1.11.1
  Building native extensions. This could take a while...
  Successfully installed sassc-2.2.1
  Successfully installed jekyll-sass-converter-2.0.1
  Successfully installed rb-fsevent-0.10.3
  Successfully installed rb-inotify-0.10.0
  Successfully installed listen-3.2.0
  Successfully installed jekyll-watch-2.2.1
  Successfully installed kramdown-2.1.0
  Successfully installed kramdown-parser-gfm-1.1.0
  Successfully installed liquid-4.0.3
  Successfully installed mercenary-0.3.6
  Successfully installed forwardable-extended-2.6.0
  Successfully installed pathutil-0.16.2
  Successfully installed rouge-3.12.0
  Successfully installed safe_yaml-1.0.5
  Successfully installed unicode-display_width-1.6.0
  Successfully installed terminal-table-1.8.0
  -------------------------------------------------------------------------------------
  Jekyll 4.0 comes with some major changes, notably:
  
    * Our `link` tag now comes with the `relative_url` filter incorporated into it.
      You should no longer prepend `{{ site.baseurl }}` to `{% link foo.md %}`
      For further details: https://github.com/jekyll/jekyll/pull/6727
  
    * Our `post_url` tag now comes with the `relative_url` filter incorporated into it.
      You shouldn't prepend `{{ site.baseurl }}` to `{% post_url 2019-03-27-hello %}`
      For further details: https://github.com/jekyll/jekyll/pull/7589
  
    * Support for deprecated configuration options has been removed. We will no longer
      output a warning and gracefully assign their values to the newer counterparts
      internally.
  -------------------------------------------------------------------------------------
  Successfully installed jekyll-4.0.0
  26 gems installed
  $ gem install jekyll-theme-basically-basic -v 1.4.1
  Successfully installed i18n-0.9.5
  Successfully installed sass-listen-4.0.0
  
  Ruby Sass has reached end-of-life and should no longer be used.
  
  * If you use Sass as a command-line tool, we recommend using Dart Sass, the new
    primary implementation: https://sass-lang.com/install
  
  * If you use Sass as a plug-in for a Ruby web framework, we recommend using the
    sassc gem: https://github.com/sass/sassc-ruby#readme
  
  * For more details, please refer to the Sass blog:
    https://sass-lang.com/blog/posts/7828841
  
  Successfully installed sass-3.7.4
  Successfully installed jekyll-sass-converter-1.5.2
  Successfully installed kramdown-1.17.0
  Successfully installed jekyll-3.8.6
  Successfully installed jekyll-sitemap-1.3.1
  Successfully installed jekyll-seo-tag-2.6.1
  Successfully installed jekyll-paginate-1.1.0
  Successfully installed jekyll-feed-0.12.1
  Successfully installed jekyll-theme-basically-basic-1.4.1
  11 gems installed
  $ gem install tzinfo -v 1.2.2
  Successfully installed thread_safe-0.3.6
  Successfully installed tzinfo-1.2.2
  2 gems installed
  $ gem install tzinfo-data
  Successfully installed tzinfo-data-1.2019.3
  1 gem installed
  $ bundle install
  Fetching gem metadata from https://rubygems.org/...........
  Fetching gem metadata from https://rubygems.org/.
  Resolving dependencies...
  Using public_suffix 4.0.1
  Using addressable 2.7.0
  Using bundler 1.17.3
  Using colorator 1.1.0
  Using concurrent-ruby 1.1.5
  Using eventmachine 1.2.7
  Using http_parser.rb 0.6.0
  Using em-websocket 0.5.1
  Using ffi 1.11.1
  Using forwardable-extended 2.6.0
  Using i18n 1.7.0
  Using sassc 2.2.1
  Using jekyll-sass-converter 2.0.1
  Using rb-fsevent 0.10.3
  Using rb-inotify 0.10.0
  Using listen 3.2.0
  Using jekyll-watch 2.2.1
  Using kramdown 2.1.0
  Using kramdown-parser-gfm 1.1.0
  Using liquid 4.0.3
  Using mercenary 0.3.6
  Using pathutil 0.16.2
  Using rouge 3.12.0
  Using safe_yaml 1.0.5
  Using unicode-display_width 1.6.0
  Using terminal-table 1.8.0
  Using jekyll 4.0.0
  Using jekyll-feed 0.12.1
  Bundle complete! 2 Gemfile dependencies, 28 gems now installed.
  Bundled gems are installed into `/usr/local/bundle`
  $ jekyll build --trace -d public/
  Configuration file: /builds/unveiled_adri/jekyll_project/_config.yml
  /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/theme.rb:76:in `rescue in gemspec': The jekyll-theme-basically-basic theme could not be found. (Jekyll::Errors::MissingDependencyException)
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/theme.rb:73:in `gemspec'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/theme.rb:18:in `root'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/theme.rb:12:in `initialize'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/site.rb:487:in `new'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/site.rb:487:in `configure_theme'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/site.rb:58:in `config='
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/site.rb:23:in `initialize'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/commands/build.rb:30:in `new'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/commands/build.rb:30:in `process'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/command.rb:89:in `block in process_with_graceful_fail'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/command.rb:89:in `each'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/command.rb:89:in `process_with_graceful_fail'
      from /usr/local/bundle/gems/jekyll-4.0.0/lib/jekyll/commands/build.rb:18:in `block (2 levels) in init_with_program'
      from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `block in execute'
      from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `each'
      from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary/command.rb:220:in `execute'
      from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary/program.rb:42:in `go'
      from /usr/local/bundle/gems/mercenary-0.3.6/lib/mercenary.rb:19:in `program'
      from /usr/local/bundle/gems/jekyll-4.0.0/exe/jekyll:15:in `&lt;top (required)&gt;'
      from /usr/local/bundle/bin/jekyll:23:in `load'
      from /usr/local/bundle/bin/jekyll:23:in `&lt;main&gt;'
  ERROR: Job failed: exit code 1
  </code></pre>
  
  <h2>Conclusion</h2>
  
  <p>I have tried everything but at this almost last point of the deployment I'm completely lost. I could solve the installation problems but now I don't know how to solve this.</p>