diff --git a/gemfiles/contexts/core.gemfile b/gemfiles/contexts/core.gemfile
deleted file mode 100644
index 2572e2b..0000000
--- a/gemfiles/contexts/core.gemfile
+++ /dev/null
@@ -1,7 +0,0 @@
-# frozen_string_literal: true
-
-# Dev
-gem "rake", "~> 13.0"
-
-# Binding.pry - Irb replacement
-gem "pry", "~> 0.14"
diff --git a/gemfiles/contexts/coverage.gemfile b/gemfiles/contexts/coverage.gemfile
deleted file mode 100644
index d05877c..0000000
--- a/gemfiles/contexts/coverage.gemfile
+++ /dev/null
@@ -1,11 +0,0 @@
-# CodeCov + GitHub setup: https://github.com/marketplace/actions/codecov
-# NOTE: CodeCov no longer supports integration via ruby gem!
-#   see https://docs.codecov.com/docs/deprecated-uploader-migration-guide#ruby-uploader
-# gem "codecov", "~> 0.6", require: false # For CodeCov
-gem "simplecov", "~> 0.22", require: false
-gem "simplecov-cobertura", require: false # XML for Jenkins
-gem "simplecov-json", "~> 0.2", require: false # For CodeClimate
-gem "simplecov-lcov", "~> 0.8", require: false
-# SimpleCov extension gems can be slow to update.
-# Avoid deprecations by using fixed forks.
-gem "simplecov-rcov", github: "pboling/simplecov-rcov", branch: "patch-1", require: false
diff --git a/gemfiles/contexts/debug.gemfile b/gemfiles/contexts/debug.gemfile
deleted file mode 100644
index 6b4bb65..0000000
--- a/gemfiles/contexts/debug.gemfile
+++ /dev/null
@@ -1,7 +0,0 @@
-platform :mri do
-  eval_gemfile "./mri/debug.gemfile"
-end
-
-platform :jruby do
-  eval_gemfile "./jruby/debug.gemfile"
-end
diff --git a/gemfiles/contexts/docs.gemfile b/gemfiles/contexts/docs.gemfile
deleted file mode 100644
index 9c981a8..0000000
--- a/gemfiles/contexts/docs.gemfile
+++ /dev/null
@@ -1,5 +0,0 @@
-# frozen_string_literal: true
-
-gem "yard", ["~> 0.9", ">= 0.9.34"]
-gem "yard-junk", "~> 0.0"
-gem "redcarpet", "~> 3.6"
diff --git a/gemfiles/contexts/jruby/debug.gemfile b/gemfiles/contexts/jruby/debug.gemfile
deleted file mode 100644
index 4d23fcb..0000000
--- a/gemfiles/contexts/jruby/debug.gemfile
+++ /dev/null
@@ -1,8 +0,0 @@
-if DEBUG_IDE
-  # See: https://github.com/ruby-debug/ruby-debug-ide#install-debugging-gems
-  gem "debase", "~> 0.2"
-  gem "ruby-debug-base", "~> 0.10"
-else
-  # See: https://gitlab.com/ivoanjo/pry-debugger-jruby
-  gem "pry-debugger-jruby", "~> 2.1"
-end
diff --git a/gemfiles/contexts/mri/debug.gemfile b/gemfiles/contexts/mri/debug.gemfile
deleted file mode 100644
index 8386880..0000000
--- a/gemfiles/contexts/mri/debug.gemfile
+++ /dev/null
@@ -1,10 +0,0 @@
-if DEBUG_IDE
-  # See: https://github.com/ruby-debug/ruby-debug-ide#install-debugging-gems
-  gem "debase", "~> 0.2"
-  gem "ruby-debug-ide", "~> 0.7.3"
-else
-  # See:
-  #   https://blog.pawandubey.com/explained-binding-pry-byebug-debugger/
-  #   https://github.com/davidcelis/pry-suite
-  gem "pry-suite", "~> 1.2"
-end
diff --git a/gemfiles/contexts/style.gemfile b/gemfiles/contexts/style.gemfile
deleted file mode 100644
index ef507c6..0000000
--- a/gemfiles/contexts/style.gemfile
+++ /dev/null
@@ -1,32 +0,0 @@
-# frozen_string_literal: true
-
-# Runtime dependencies are managed by gemspec
-# gem "rubocop-gradual"
-# gem "rubocop-md"
-# gem "rubocop-rake"
-# gem "rubocop-rspec"
-# gem "rubocop-shopify"
-# gem "rubocop-thread_safety"
-# gem "standard-rubocop-lts"
-
-# Development only
-# RubyGems adding this gem will need to explicitly add rubocop-packaging to their dependencies.
-# Since it only applies to rubygems we do not add it as a runtime dependency of this gem.
-gem "rubocop-packaging", "~> 0.5", ">= 0.5.2", require: false  # Ruby >= 2.6.0
-
-# Code tested with RSpec will need to explicitly add rubocop-rspec to their dependencies.
-# Since it only applies to RSpec, which some people or projects don't use,
-#   we do not add it as a runtime dependency of this gem.
-gem "rubocop-rspec", "~> 2.22", require: false                 # Ruby >= 2.7.0
-
-# standard-rails pulls in rubocop-rails
-# Rails apps will need to explicitly add standard-rails to their dependencies.
-# Since it only applies to Rails, which some people or projects don't use,
-#   we do not add it as a runtime dependency of this gem.
-gem "standard-rails", "~> 0.1", require: false                 # Ruby >= 2.7.0
-
-# betterlint pulls in rubocop & rubocop-rspec
-# Rails apps will need to explicitly add betterlint to their dependencies.
-# Since it only applies to Rails, which some people or projects don't use,
-#   we do not add it as a runtime dependency of this gem.
-gem "betterlint", "~> 1.4", ">= 1.4.7", require: false         # Ruby >= 2.7.0
diff --git a/gemfiles/contexts/testing.gemfile b/gemfiles/contexts/testing.gemfile
deleted file mode 100644
index 4b233ee..0000000
--- a/gemfiles/contexts/testing.gemfile
+++ /dev/null
@@ -1,5 +0,0 @@
-# frozen_string_literal: true
-
-# Testing
-gem "rspec", "~> 3.12"
-gem "rspec-block_is_expected", "~> 1.0" # Ships a RuboCop rule
diff --git a/gemfiles/coverage.gemfile b/gemfiles/coverage.gemfile
index 8c971e9..91137db 100644
--- a/gemfiles/coverage.gemfile
+++ b/gemfiles/coverage.gemfile
@@ -1,11 +1,10 @@
-# frozen_string_literal: true
+source "https://rubygems.org"
 
 git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
+git_source(:gitlab) { |repo_name| "https://gitlab.com/#{repo_name}" }
 
-source "https://rubygems.org"
-
-eval_gemfile "./contexts/core.gemfile"
-eval_gemfile "./contexts/coverage.gemfile"
-eval_gemfile "./contexts/testing.gemfile"
+# Root Gemfile is only for local development.
+# On CI we only need the gemspecs' dependencies (including development dependencies).
+# Exceptions, if any, will be found in gemfiles/*.gemfile
 
 gemspec path: "../"
diff --git a/gemfiles/rails7.gemfile b/gemfiles/rails7.gemfile
index e2f7019..aa21597 100644
--- a/gemfiles/rails7.gemfile
+++ b/gemfiles/rails7.gemfile
@@ -1,5 +1,12 @@
-# frozen_string_literal: true
+source "https://rubygems.org"
 
-eval_gemfile "./vanilla.gemfile"
+git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
+git_source(:gitlab) { |repo_name| "https://gitlab.com/#{repo_name}" }
 
 gem "rails", "~> 7.0"
+
+# Root Gemfile is only for local development.
+# On CI we only need the gemspecs' dependencies (including development dependencies).
+# Exceptions, if any, will be found in gemfiles/*.gemfile
+
+gemspec path: "../"
diff --git a/gemfiles/style.gemfile b/gemfiles/style.gemfile
index da4212e..91137db 100644
--- a/gemfiles/style.gemfile
+++ b/gemfiles/style.gemfile
@@ -1,9 +1,10 @@
-# frozen_string_literal: true
-
 source "https://rubygems.org"
 
-eval_gemfile "./contexts/core.gemfile"
-eval_gemfile "./contexts/style.gemfile"
-eval_gemfile "./contexts/testing.gemfile" # Because some RSpec plugins ship Rubocop Rules
+git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
+git_source(:gitlab) { |repo_name| "https://gitlab.com/#{repo_name}" }
+
+# Root Gemfile is only for local development.
+# On CI we only need the gemspecs' dependencies (including development dependencies).
+# Exceptions, if any, will be found in gemfiles/*.gemfile
 
 gemspec path: "../"
diff --git a/gemfiles/vanilla.gemfile b/gemfiles/vanilla.gemfile
index ff5abea..91137db 100644
--- a/gemfiles/vanilla.gemfile
+++ b/gemfiles/vanilla.gemfile
@@ -1,8 +1,10 @@
-# frozen_string_literal: true
-
 source "https://rubygems.org"
 
-eval_gemfile "./contexts/core.gemfile"
-eval_gemfile "./contexts/testing.gemfile"
+git_source(:github) { |repo_name| "https://github.com/#{repo_name}" }
+git_source(:gitlab) { |repo_name| "https://gitlab.com/#{repo_name}" }
+
+# Root Gemfile is only for local development.
+# On CI we only need the gemspecs' dependencies (including development dependencies).
+# Exceptions, if any, will be found in gemfiles/*.gemfile
 
 gemspec path: "../"