diff --git a/Gemfile b/Gemfile
index 1e476dde..78eb020c 100644
--- a/Gemfile
+++ b/Gemfile
@@ -48,9 +48,9 @@ gem 'image_processing'
 gem 'icalendar'
 gem 'inline_svg'
 gem 'httparty'
-gem 'safe_yaml', source: 'https://gems.sutty.nl'
+gem 'safe_yaml'
 gem 'jekyll', '~> 4.2'
-gem 'jekyll-data', source: 'https://gems.sutty.nl'
+gem 'jekyll-data'
 gem 'jekyll-commonmark'
 gem 'jekyll-images'
 gem 'jekyll-include-cache'
@@ -99,18 +99,6 @@ gem 'net-ssh'
 gem 'ed25519'
 gem 'bcrypt_pbkdf'
 
-group :themes do
-  gem 'adhesiones-jekyll-theme', require: false
-  gem 'editorial-autogestiva-jekyll-theme', require: false
-  gem 'minima', require: false
-  gem 'sutty-minima', require: false
-  gem 'radios-comunitarias-jekyll-theme', require: false
-  gem 'share-to-fediverse-jekyll-theme', require: false
-  gem 'sutty-donaciones-jekyll-theme', require: false
-  gem 'sutty-jekyll-theme', require: false
-  gem 'recursero-jekyll-theme', require: false
-end
-
 group :production do
   gem 'lograge'
 end
diff --git a/Gemfile.lock b/Gemfile.lock
index 87812726..dffe90bf 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -88,15 +88,6 @@ GEM
       zeitwerk (~> 2.3)
     addressable (2.8.0)
       public_suffix (>= 2.0.2, < 5.0)
-    adhesiones-jekyll-theme (0.2.1)
-      jekyll (~> 4.0)
-      jekyll-data (~> 1.1)
-      jekyll-feed (~> 0.9)
-      jekyll-images (~> 0.2)
-      jekyll-include-cache (~> 0)
-      jekyll-locales (~> 0.1)
-      jekyll-relative-urls (~> 0.0)
-      jekyll-seo-tag (~> 2.1)
     ast (2.4.2)
     autoprefixer-rails (10.3.3.0)
       execjs (~> 2)
@@ -169,25 +160,6 @@ GEM
     down (5.2.4)
       addressable (~> 2.8)
     ed25519 (1.2.4-x86_64-linux-musl)
-    editorial-autogestiva-jekyll-theme (0.3.4)
-      jekyll (~> 4)
-      jekyll-commonmark (~> 1.3)
-      jekyll-data (~> 1.1)
-      jekyll-dotenv (>= 0.2)
-      jekyll-feed (~> 0.15)
-      jekyll-hardlinks (~> 0)
-      jekyll-ignore-layouts (~> 0)
-      jekyll-images (~> 0.2)
-      jekyll-include-cache (~> 0)
-      jekyll-linked-posts (~> 0)
-      jekyll-locales (~> 0.1)
-      jekyll-order (~> 0)
-      jekyll-relative-urls (~> 0)
-      jekyll-seo-tag (~> 2)
-      jekyll-spree-client (~> 0)
-      jekyll-unique-urls (~> 0)
-      jekyll-write-and-commit-changes (~> 0)
-      sutty-liquid (~> 0)
     em-websocket (0.5.3)
       eventmachine (>= 0.12.9)
       http_parser.rb (~> 0)
@@ -369,10 +341,6 @@ GEM
     mini_magick (4.11.0)
     mini_mime (1.1.2)
     mini_portile2 (2.6.1)
-    minima (2.5.1)
-      jekyll (>= 3.5, < 5.0)
-      jekyll-feed (~> 0.9)
-      jekyll-seo-tag (~> 2.1)
     minitest (5.14.4)
     mobility (1.2.4)
       i18n (>= 0.6.10, < 2)
@@ -415,17 +383,6 @@ GEM
       rack
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
-    radios-comunitarias-jekyll-theme (0.1.5)
-      jekyll (~> 4.0)
-      jekyll-data (~> 1.1)
-      jekyll-feed (~> 0.9)
-      jekyll-images (~> 0.2)
-      jekyll-include-cache (~> 0)
-      jekyll-linked-posts (~> 0)
-      jekyll-locales (~> 0.1)
-      jekyll-relative-urls (~> 0.0)
-      jekyll-seo-tag (~> 2.1)
-      jekyll-turbolinks (~> 0)
     rails (6.1.4.1)
       actioncable (= 6.1.4.1)
       actionmailbox (= 6.1.4.1)
@@ -462,24 +419,6 @@ GEM
     rb-fsevent (0.11.0)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
-    recursero-jekyll-theme (0.2.0)
-      jekyll (~> 4)
-      jekyll-commonmark (~> 1.3)
-      jekyll-data (~> 1.1)
-      jekyll-dotenv (>= 0.2)
-      jekyll-feed (~> 0.15)
-      jekyll-ignore-layouts (~> 0)
-      jekyll-images (~> 0.2)
-      jekyll-include-cache (~> 0)
-      jekyll-linked-posts (~> 0)
-      jekyll-locales (~> 0.1)
-      jekyll-lunr (~> 0.1)
-      jekyll-order (~> 0)
-      jekyll-relative-urls (~> 0)
-      jekyll-seo-tag (~> 2)
-      jekyll-unique-urls (~> 0.1)
-      sutty-archives (~> 2.2)
-      sutty-liquid (~> 0)
     redis (4.5.1)
     redis-actionpack (5.2.0)
       actionpack (>= 5, < 7)
@@ -552,14 +491,6 @@ GEM
       rubyzip (>= 1.2.2)
     semantic_range (3.0.0)
     sexp_processor (4.16.0)
-    share-to-fediverse-jekyll-theme (0.1.4)
-      jekyll (~> 4.0)
-      jekyll-data (~> 1.1)
-      jekyll-feed (~> 0.9)
-      jekyll-images (~> 0.2)
-      jekyll-include-cache (~> 0)
-      jekyll-relative-urls (~> 0.0)
-      jekyll-seo-tag (~> 2.1)
     simpleidn (0.2.1)
       unf (~> 0.1.4)
     sourcemap (0.1.1)
@@ -583,30 +514,9 @@ GEM
       concurrent-ruby (~> 1.0)
     sutty-archives (2.5.4)
       jekyll (>= 3.6, < 5.0)
-    sutty-donaciones-jekyll-theme (0.1.2)
-      jekyll (~> 4.0)
-      jekyll-data (~> 1.1)
-      jekyll-feed (~> 0.9)
-      jekyll-images (~> 0.2)
-      jekyll-include-cache (~> 0)
-      jekyll-locales (~> 0.1)
-      jekyll-relative-urls (~> 0.0)
-      jekyll-seo-tag (~> 2.1)
-      sutty-archives (~> 2.2)
-    sutty-jekyll-theme (0.1.2)
-      jekyll (~> 4.0)
-      jekyll-feed (~> 0.9)
-      jekyll-images (~> 0.2)
-      jekyll-include-cache (~> 0)
-      jekyll-relative-urls (~> 0.0)
-      jekyll-seo-tag (~> 2.1)
     sutty-liquid (0.7.4)
       fast_blank (~> 1.0)
       jekyll (~> 4)
-    sutty-minima (2.5.0)
-      jekyll (>= 3.5, < 5.0)
-      jekyll-feed (~> 0.9)
-      jekyll-seo-tag (~> 2.1)
     symbol-fstring (1.0.2-x86_64-linux-musl)
     sysexits (1.2.0)
     temple (0.8.2)
@@ -654,7 +564,6 @@ PLATFORMS
   x86_64-linux-musl
 
 DEPENDENCIES
-  adhesiones-jekyll-theme
   bcrypt (~> 3.1.7)
   bcrypt_pbkdf
   blazer
@@ -672,7 +581,6 @@ DEPENDENCIES
   dotenv-rails
   down
   ed25519
-  editorial-autogestiva-jekyll-theme
   email_address!
   exception_notification
   factory_bot_rails
@@ -691,7 +599,7 @@ DEPENDENCIES
   jbuilder (~> 2.5)
   jekyll (~> 4.2)
   jekyll-commonmark
-  jekyll-data!
+  jekyll-data
   jekyll-images
   jekyll-include-cache
   kaminari
@@ -702,7 +610,6 @@ DEPENDENCIES
   lograge
   memory_profiler
   mini_magick
-  minima
   mobility
   net-ssh
   nokogiri
@@ -714,31 +621,25 @@ DEPENDENCIES
   pundit
   rack-cors
   rack-mini-profiler
-  radios-comunitarias-jekyll-theme
   rails (~> 6)
   rails-i18n
   rails_warden
-  recursero-jekyll-theme
   redis
   redis-rails
   rollups!
   rubocop-rails
   rubyzip
   rugged
-  safe_yaml!
+  safe_yaml
   sassc-rails
   selenium-webdriver
-  share-to-fediverse-jekyll-theme
   sourcemap
   spring
   spring-watcher-listen (~> 2.0.0)
   sqlite3
   stackprof
   sucker_punch
-  sutty-donaciones-jekyll-theme
-  sutty-jekyll-theme
   sutty-liquid (>= 0.7.3)
-  sutty-minima
   symbol-fstring
   terminal-table
   timecop
diff --git a/app/models/deploy_local.rb b/app/models/deploy_local.rb
index 1b661059..66a8345a 100644
--- a/app/models/deploy_local.rb
+++ b/app/models/deploy_local.rb
@@ -93,11 +93,7 @@ class DeployLocal < Deploy
   end
 
   def bundle
-    if Rails.env.production?
-      run %(bundle install --no-cache --path="#{gems_dir}")
-    else
-      run %(bundle install)
-    end
+    run %(bundle install --no-cache --path="#{gems_dir}")
   end
 
   def jekyll_build
diff --git a/app/models/site.rb b/app/models/site.rb
index fd318995..8cab0ae0 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -54,10 +54,6 @@ class Site < ApplicationRecord
   before_create :clone_skel!
   # Elimina el directorio al destruir un sitio
   before_destroy :remove_directories!
-  # Carga el sitio Jekyll una vez que se inicializa el modelo o después
-  # de crearlo
-  after_initialize :load_jekyll
-  after_create :load_jekyll
   # Cambiar el nombre del directorio
   before_update :update_name!
   before_save :add_private_key_if_missing!
@@ -355,10 +351,19 @@ class Site < ApplicationRecord
     status == 'building'
   end
 
+  def jekyll?
+    File.directory? path
+  end
+
   def jekyll
-    run_in_path do
-      @jekyll ||= Jekyll::Site.new(configuration)
-    end
+    @jekyll ||=
+      begin
+        install_gems
+
+        Jekyll::Site.new(configuration).tap do |site|
+          site.reader = JekyllData::Reader.new(site) if site.theme
+        end
+      end
   end
 
   # Cargar el sitio Jekyll
@@ -404,9 +409,6 @@ class Site < ApplicationRecord
       @configuration[unneeded] = [] if @configuration.key? unneeded
     end
 
-    # Eliminar el theme si no es una gema válida
-    @configuration.delete('theme') unless theme_available?
-
     # Si estamos usando nuestro propio plugin de i18n, los posts están
     # en "colecciones"
     locales.map(&:to_s).each do |i|
@@ -416,20 +418,6 @@ class Site < ApplicationRecord
     @configuration
   end
 
-  # Lista los nombres de las plantillas disponibles como gemas,
-  # tomándolas dinámicamente de las que agreguemos en el grupo :themes
-  # del Gemfile.
-  def available_themes
-    @available_themes ||= Bundler.load.current_dependencies.select do |gem|
-      gem.groups.include? :themes
-    end.map(&:name)
-  end
-
-  # Detecta si el tema actual es una gema
-  def theme_available?
-    available_themes.include? design&.gem
-  end
-
   # Devuelve el dominio actual
   def self.domain
     ENV.fetch('SUTTY', 'sutty.nl')
@@ -468,7 +456,7 @@ class Site < ApplicationRecord
   # Clona el esqueleto de Sutty para crear el sitio nuevo, no pasa nada
   # si el sitio ya existe
   def clone_skel!
-    return if File.directory? path
+    return if jekyll?
 
     Rugged::Repository.clone_at ENV['SKEL_SUTTY'], path
   end
@@ -551,4 +539,11 @@ class Site < ApplicationRecord
   def run_in_path(&block)
     Dir.chdir path, &block
   end
+
+  def install_gems
+    return unless persisted?
+    return if Rails.root.join('_storage', 'gems', name).directory?
+
+    deploys.find_by_type('DeployLocal').send(:bundle)
+  end
 end
diff --git a/app/views/sites/index.haml b/app/views/sites/index.haml
index d69dbeac..56178775 100644
--- a/app/views/sites/index.haml
+++ b/app/views/sites/index.haml
@@ -14,7 +14,7 @@
     %table.table.table-condensed
       %tbody
         - @sites.each do |site|
-          - next unless site.jekyll
+          - next unless site.jekyll?
           - rol = current_usuarie.rol_for_site(site)
           -#
             TODO: Solo les usuaries cachean porque tenemos que separar
diff --git a/config/initializers/core_extensions.rb b/config/initializers/core_extensions.rb
index 66d2c92b..1516a43a 100644
--- a/config/initializers/core_extensions.rb
+++ b/config/initializers/core_extensions.rb
@@ -37,6 +37,13 @@ end
 #
 # TODO: Aplicar monkey patches en otro lado...
 module Jekyll
+  Site.class_eval do
+    def configure_theme
+      self.theme = nil
+      self.theme = Jekyll::Theme.new(config['theme'], self) unless config['theme'].nil?
+    end
+  end
+
   Reader.class_eval do
     # No necesitamos otros posts
     def retrieve_posts(_); end
@@ -69,6 +76,46 @@ module Jekyll
     end
   end
 
+  Theme.class_eval do
+    attr_reader :site
+
+    def initialize(name, site)
+      @name = name.downcase.strip
+      @site = site
+    end
+
+    def root
+      @root ||= begin
+        lockfile = Bundler::LockfileParser.new(File.read(site.in_source_dir('Gemfile.lock')))
+        spec = lockfile.specs.find do |spec|
+          spec.name == name
+        end
+
+        ruby_version = Gem::Version.new(RUBY_VERSION)
+        ruby_version.canonical_segments[2] = 0
+        base_path = Rails.root.join('_storage', 'gems', File.basename(site.source), 'ruby',
+                                    ruby_version.canonical_segments.join('.'))
+
+        File.realpath(
+          case spec.source
+          when Bundler::Source::Git
+            File.join(base_path, 'bundler', 'gems', spec.source.extension_dir_name)
+          when Bundler::Source::Rubygems
+            File.join(base_path, 'gems', spec.full_name)
+          end
+        )
+      end
+    end
+
+    def runtime_dependencies
+      []
+    end
+
+    private
+
+    def gemspec; end
+  end
+
   # No necesitamos los archivos de la plantilla
   ThemeAssetsReader.class_eval do
     def read; end