diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 69090c5b..8fa448d4 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -60,7 +60,9 @@ jobs:
       - name: Generate the project with the default value
         run: |
           rm -rf src/serious_scaffold
-          copier copy -x '!src/serious_scaffold' -r HEAD -f . .
+          rm -rf .github
+          rm -rf .gitlab-ci.yml
+          copier copy -x '!src/serious_scaffold' -d ci=both -r HEAD -f . .
       - run: git diff
       - run: git status --porcelain
       - run: |
diff --git a/.gitignore.jinja b/.gitignore.jinja
index b1b96cb2..489ea814 100644
--- a/.gitignore.jinja
+++ b/.gitignore.jinja
@@ -1,9 +1,9 @@
 # Custom
 *.swp
 .DS_Store
-{%- if project_name == "Serious Scaffold Python" %}
+[%- if project_name == "Serious Scaffold Python" %]
 .copier-answers.yml
-{%- endif %}
+[%- endif %]
 Pipfile
 public
 
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 42bd69fd..aebf53aa 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -72,6 +72,7 @@
     "sortJSONValuesReverse": false
   },
   "vscode-yaml-sort.customSortKeywords_2": [
+    "_envops",
     "_exclude",
     "project_name",
     "project_description",
@@ -86,6 +87,7 @@
     "min_py",
     "max_py",
     "default_py",
+    "ci",
     "choices",
     "stages",
     "default",
diff --git a/Makefile.jinja b/Makefile.jinja
index fb980f19..15e6f22f 100644
--- a/Makefile.jinja
+++ b/Makefile.jinja
@@ -18,9 +18,9 @@ PUBLIC_DIR := $(if $(shell [ "$$READTHEDOCS" = "True" ] && echo 1),$$READTHEDOCS
 clean:
 	-rm -rf \
 		${PUBLIC_DIR} \
-{%- if project_name == "Serious Scaffold Python" %}
+[%- if project_name == "Serious Scaffold Python" %]
 		.copier-answers.yml \
-{%- endif %}
+[%- endif %]
 		.coverage \
 		.mypy_cache \
 		.pytest_cache \
diff --git a/.gitlab-ci.yml.jinja b/[% if ci == 'gitlab' or ci == 'both' %].gitlab-ci.yml[% endif %].jinja
similarity index 76%
rename from .gitlab-ci.yml.jinja
rename to [% if ci == 'gitlab' or ci == 'both' %].gitlab-ci.yml[% endif %].jinja
index 11ed9823..515ee7b6 100644
--- a/.gitlab-ci.yml.jinja
+++ b/[% if ci == 'gitlab' or ci == 'both' %].gitlab-ci.yml[% endif %].jinja	
@@ -1,4 +1,4 @@
-{% from pathjoin("includes", "version_compare.jinja") import version_between -%}
+[% from pathjoin("includes", "version_compare.jinja") import version_between -%]
 stages:
   - lint_test
   - build_release
@@ -14,18 +14,18 @@ lint:
   parallel:
     matrix:
       - PYTHON_VERSION:
-{%- if version_between("3.8", min_py, max_py) %}
+[%- if version_between("3.8", min_py, max_py) %]
           - '3.8'
-{%- endif %}
-{%- if version_between("3.9", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.9", min_py, max_py) %]
           - '3.9'
-{%- endif %}
-{%- if version_between("3.10", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.10", min_py, max_py) %]
           - '3.10'
-{%- endif %}
-{%- if version_between("3.11", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.11", min_py, max_py) %]
           - '3.11'
-{%- endif %}
+[%- endif %]
   script:
     - env | sort
     - make dev-lint
@@ -47,18 +47,18 @@ test:
   parallel:
     matrix:
       - PYTHON_VERSION:
-{%- if version_between("3.8", min_py, max_py) %}
+[%- if version_between("3.8", min_py, max_py) %]
           - '3.8'
-{%- endif %}
-{%- if version_between("3.9", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.9", min_py, max_py) %]
           - '3.9'
-{%- endif %}
-{%- if version_between("3.10", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.10", min_py, max_py) %]
           - '3.10'
-{%- endif %}
-{%- if version_between("3.11", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.11", min_py, max_py) %]
           - '3.11'
-{%- endif %}
+[%- endif %]
   script:
     - env | sort
     - make dev-test
diff --git a/.github/FUNDING.yml.jinja b/[% if ci=='github' or ci == 'both' %].github[% endif %]/FUNDING.yml.jinja
similarity index 100%
rename from .github/FUNDING.yml.jinja
rename to [% if ci=='github' or ci == 'both' %].github[% endif %]/FUNDING.yml.jinja
diff --git a/.github/workflows/ci.yml.jinja b/[% if ci=='github' or ci == 'both' %].github[% endif %]/workflows/ci.yml.jinja
similarity index 68%
rename from .github/workflows/ci.yml.jinja
rename to [% if ci=='github' or ci == 'both' %].github[% endif %]/workflows/ci.yml.jinja
index 1f59a361..21838659 100644
--- a/.github/workflows/ci.yml.jinja
+++ b/[% if ci=='github' or ci == 'both' %].github[% endif %]/workflows/ci.yml.jinja	
@@ -1,4 +1,4 @@
-{% from pathjoin("includes", "version_compare.jinja") import version_between -%}
+[% from pathjoin("includes", "version_compare.jinja") import version_between -%]
 jobs:
   lint:
     runs-on: ubuntu-latest
@@ -15,18 +15,18 @@ jobs:
     strategy:
       matrix:
         python-version:
-{%- if version_between("3.8", min_py, max_py) %}
+[%- if version_between("3.8", min_py, max_py) %]
           - '3.8'
-{%- endif %}
-{%- if version_between("3.9", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.9", min_py, max_py) %]
           - '3.9'
-{%- endif %}
-{%- if version_between("3.10", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.10", min_py, max_py) %]
           - '3.10'
-{%- endif %}
-{%- if version_between("3.11", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.11", min_py, max_py) %]
           - '3.11'
-{%- endif %}
+[%- endif %]
   test:
     runs-on: ubuntu-latest
     steps:
@@ -46,19 +46,19 @@ jobs:
     strategy:
       matrix:
         python-version:
-{%- if version_between("3.8", min_py, max_py) %}
+[%- if version_between("3.8", min_py, max_py) %]
           - '3.8'
-{%- endif %}
-{%- if version_between("3.9", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.9", min_py, max_py) %]
           - '3.9'
-{%- endif %}
-{%- if version_between("3.10", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.10", min_py, max_py) %]
           - '3.10'
-{%- endif %}
-{%- if version_between("3.11", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.11", min_py, max_py) %]
           - '3.11'
-{%- endif %}
-{%- if project_name == "Serious Scaffold Python" %}
+[%- endif %]
+[%- if project_name == "Serious Scaffold Python" %]
   consistency:
     runs-on: ubuntu-latest
     steps:
@@ -78,7 +78,9 @@ jobs:
       - name: Generate the project with the default value
         run: |
           rm -rf src/serious_scaffold
-          copier copy -x '!src/serious_scaffold' -r HEAD -f . .
+          rm -rf .github
+          rm -rf .gitlab-ci.yml
+          copier copy -x '!src/serious_scaffold' -d ci=both -r HEAD -f . .
       - run: git diff
       - run: git status --porcelain
       - run: |
@@ -88,19 +90,19 @@ jobs:
     strategy:
       matrix:
         python-version:
-{%- if version_between("3.8", min_py, max_py) %}
+[%- if version_between("3.8", min_py, max_py) %]
           - '3.8'
-{%- endif %}
-{%- if version_between("3.9", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.9", min_py, max_py) %]
           - '3.9'
-{%- endif %}
-{%- if version_between("3.10", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.10", min_py, max_py) %]
           - '3.10'
-{%- endif %}
-{%- if version_between("3.11", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.11", min_py, max_py) %]
           - '3.11'
-{%- endif %}
-{%- endif %}
+[%- endif %]
+[%- endif %]
 name: CI
 on:
   pull_request:
diff --git a/.github/workflows/readthedocs-preview.yml.jinja b/[% if ci=='github' or ci == 'both' %].github[% endif %]/workflows/readthedocs-preview.yml.jinja
similarity index 100%
rename from .github/workflows/readthedocs-preview.yml.jinja
rename to [% if ci=='github' or ci == 'both' %].github[% endif %]/workflows/readthedocs-preview.yml.jinja
diff --git a/.github/workflows/release.yml.jinja b/[% if ci=='github' or ci == 'both' %].github[% endif %]/workflows/release.yml.jinja
similarity index 100%
rename from .github/workflows/release.yml.jinja
rename to [% if ci=='github' or ci == 'both' %].github[% endif %]/workflows/release.yml.jinja
diff --git a/copier.yaml b/copier.yaml
index e0043155..ac319ec0 100644
--- a/copier.yaml
+++ b/copier.yaml
@@ -1,3 +1,6 @@
+_envops:
+  block_end_string: '%]'
+  block_start_string: '[%'
 _exclude:
   - '*.py[co]'
   - .DS_Store
@@ -27,11 +30,11 @@ organization_name:
   type: str
 author_email:
   default: |-
-    {% if author_name == 'huxuan' and organization_name == 'Serious Scaffold' -%}
+    [% if author_name == 'huxuan' and organization_name == 'Serious Scaffold' -%]
       i@huxuan.org
-    {%- else -%}
+    [%- else -%]
       {{ author_name }}@{{ organization_name|lower|replace(" ", "-") }}.com
-    {%- endif %}
+    [%- endif %]
   help: 'Specify the email address of the author:'
   type: str
 repo_namespace:
@@ -54,7 +57,7 @@ coverage_threshold:
   default: 100
   help: 'Set the threshold for test coverage, ranging from 0 to 100:'
   type: int
-  validator: '{% if not 0 <= coverage_threshold <= 100 %}Test Coverage threshold should be between 0 and 100{% endif %}'
+  validator: '[% if not 0 <= coverage_threshold <= 100 %]Test Coverage threshold should be between 0 and 100[% endif %]'
 min_py:
   choices:
     - '3.8'
@@ -67,13 +70,13 @@ min_py:
 max_py:
   choices:
     '3.8':
-      validator: '{% from pathjoin("includes", "version_compare.jinja") import version_higher_than_validator %}{{ version_higher_than_validator("3.8", min_py) }}'
+      validator: '[% from pathjoin("includes", "version_compare.jinja") import version_higher_than_validator %]{{ version_higher_than_validator("3.8", min_py) }}'
       value: '3.8'
     '3.9':
-      validator: '{% from pathjoin("includes", "version_compare.jinja") import version_higher_than_validator %}{{ version_higher_than_validator("3.9", min_py) }}'
+      validator: '[% from pathjoin("includes", "version_compare.jinja") import version_higher_than_validator %]{{ version_higher_than_validator("3.9", min_py) }}'
       value: '3.9'
     '3.10':
-      validator: '{% from pathjoin("includes", "version_compare.jinja") import version_higher_than_validator %}{{ version_higher_than_validator("3.10", min_py) }}'
+      validator: '[% from pathjoin("includes", "version_compare.jinja") import version_higher_than_validator %]{{ version_higher_than_validator("3.10", min_py) }}'
       value: '3.10'
     '3.11':
       value: '3.11'
@@ -83,17 +86,25 @@ max_py:
 default_py:
   choices:
     '3.8':
-      validator: '{% from pathjoin("includes", "version_compare.jinja") import version_between_validator %}{{ version_between_validator("3.8", min_py, max_py) }}'
+      validator: '[% from pathjoin("includes", "version_compare.jinja") import version_between_validator %]{{ version_between_validator("3.8", min_py, max_py) }}'
       value: '3.8'
     '3.9':
-      validator: '{% from pathjoin("includes", "version_compare.jinja") import version_between_validator %}{{ version_between_validator("3.9", min_py, max_py) }}'
+      validator: '[% from pathjoin("includes", "version_compare.jinja") import version_between_validator %]{{ version_between_validator("3.9", min_py, max_py) }}'
       value: '3.9'
     '3.10':
-      validator: '{% from pathjoin("includes", "version_compare.jinja") import version_between_validator %}{{ version_between_validator("3.10", min_py, max_py) }}'
+      validator: '[% from pathjoin("includes", "version_compare.jinja") import version_between_validator %]{{ version_between_validator("3.10", min_py, max_py) }}'
       value: '3.10'
     '3.11':
-      validator: '{% from pathjoin("includes", "version_compare.jinja") import version_between_validator %}{{ version_between_validator("3.11", min_py, max_py) }}'
+      validator: '[% from pathjoin("includes", "version_compare.jinja") import version_between_validator %]{{ version_between_validator("3.11", min_py, max_py) }}'
       value: '3.11'
   default: '{{ max_py }}'
   help: 'Choose the default Python version for development, documentation generation, and package build:'
   type: str
+ci:
+  choices:
+    Both (for test only): both
+    GitHub Actions: github
+    GitLab CI: gitlab
+  default: github
+  help: 'Choose the Continuous Integration service to use:'
+  type: str
diff --git a/includes/version_compare.jinja b/includes/version_compare.jinja
index 0f45c83f..0fc94c36 100644
--- a/includes/version_compare.jinja
+++ b/includes/version_compare.jinja
@@ -1,23 +1,23 @@
-{% macro version_higher_than(version1, version2) -%}
+[% macro version_higher_than(version1, version2) -%]
   {{ "1" if version1.split(".") | map("int") | list >= version2.split(".") | map("int") | list }}
-{%- endmacro %}
+[%- endmacro %]
 
-{% macro version_higher_than_validator(version1, version2) -%}
+[% macro version_higher_than_validator(version1, version2) -%]
   {{
     "Invalid version. The version '%s' is not higher than '%s'." % (version1, version2)
     if not version_higher_than(version1, version2)
   }}
-{%- endmacro %}
+[%- endmacro %]
 
-{% macro version_between(version, version_min, version_max) -%}
+[% macro version_between(version, version_min, version_max) -%]
   {{
     "1" if version_min.split(".") | map("int") | list <= version.split(".") | map("int") | list <= version_max.split(".") | map("int") | list
   }}
-{%- endmacro %}
+[%- endmacro %]
 
-{% macro version_between_validator(version, version_min, version_max) -%}
+[% macro version_between_validator(version, version_min, version_max) -%]
   {{
     "Invalid version. The version '%s' is not between '%s' and '%s'." % (version, version_min, version_max)
     if not version_between(version, version_min, version_max)
   }}
-{%- endmacro %}
+[%- endmacro %]
diff --git a/pyproject.toml.jinja b/pyproject.toml.jinja
index e1903fe5..a39a047c 100644
--- a/pyproject.toml.jinja
+++ b/pyproject.toml.jinja
@@ -1,4 +1,4 @@
-{% from pathjoin("includes", "version_compare.jinja") import version_between -%}
+[% from pathjoin("includes", "version_compare.jinja") import version_between -%]
 [build-system]
 build-backend = "setuptools.build_meta"
 requires = [
@@ -14,18 +14,18 @@ classifiers = [
   "Development Status :: 4 - Beta",
   "License :: OSI Approved :: MIT License",
   "Operating System :: OS Independent",
-{%- if version_between("3.10", min_py, max_py) %}
+[%- if version_between("3.10", min_py, max_py) %]
   "Programming Language :: Python :: 3.10",
-{%- endif %}
-{%- if version_between("3.11", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.11", min_py, max_py) %]
   "Programming Language :: Python :: 3.11",
-{%- endif %}
-{%- if version_between("3.8", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.8", min_py, max_py) %]
   "Programming Language :: Python :: 3.8",
-{%- endif %}
-{%- if version_between("3.9", min_py, max_py) %}
+[%- endif %]
+[%- if version_between("3.9", min_py, max_py) %]
   "Programming Language :: Python :: 3.9",
-{%- endif %}
+[%- endif %]
 ]
 description = "{{ project_description }}"
 dynamic = [
@@ -53,9 +53,9 @@ fail_under = {{ coverage_threshold }}
 
 [tool.coverage.run]
 omit = [
-{%- if project_name == "Serious Scaffold Python" %}
+[%- if project_name == "Serious Scaffold Python" %]
   "src/{{ '{{ module_name }}' }}/**",
-{%- endif %}
+[%- endif %]
 ]
 source = [
   "{{ module_name }}",
@@ -73,9 +73,9 @@ enable_error_code = [
   "ignore-without-code",
 ]
 exclude = [
-{%- if project_name == "Serious Scaffold Python" %}
+[%- if project_name == "Serious Scaffold Python" %]
   "src/{{ '{{ module_name }}' }}",
-{%- endif %}
+[%- endif %]
 ]
 no_implicit_optional = true
 show_error_codes = true
diff --git a/src/{{ module_name }}/settings.py.jinja b/src/{{ module_name }}/settings.py.jinja
index b13e2b72..4cc53518 100644
--- a/src/{{ module_name }}/settings.py.jinja	
+++ b/src/{{ module_name }}/settings.py.jinja	
@@ -1,10 +1,10 @@
-{% from pathjoin("includes", "version_compare.jinja") import version_higher_than -%}
+[% from pathjoin("includes", "version_compare.jinja") import version_higher_than -%]
 """Settings Module."""
 import logging
 from logging import getLevelName
-{%- if not version_higher_than(min_py, "3.10") %}
+[%- if not version_higher_than(min_py, "3.10") %]
 from typing import Optional
-{%- endif %}
+[%- endif %]
 
 from pydantic_settings import BaseSettings, SettingsConfigDict
 
@@ -18,17 +18,17 @@ class GlobalSettings(BaseSettings):
 
 class Settings(BaseSettings):
     """Project specific settings."""
-{%- if not version_higher_than(min_py, "3.10") %}
+[%- if not version_higher_than(min_py, "3.10") %]
 
     # NOTE(huxuan): Pydantic cannot leverage future annotations at runtime prior to
     # Python 3.10, so `from __future__ import annotations` cannot be used here, and the
     # lint error need to be ignored unless the minimal Python version >= 3.10.
     # Reference: https://github.com/pydantic/pydantic/issues/3300#issuecomment-1034007897
     logging_level: Optional[str] = getLevelName(logging.INFO)  # noqa: FA100
-{%- else %}
+[%- else %]
 
     logging_level: str | None = getLevelName(logging.INFO)
-{%- endif %}
+[%- endif %]
     """Default logging level for the project."""
 
     model_config = SettingsConfigDict(