设置 discourse 的帮助 出现错误，无法安装 xorcist (1.1.2)，Bundler 无法继续

安装
1

当我运行 bundle install 时，我遇到了这个错误：安装 xorcist (1.1.2) 时出错，Bundler 无法继续。

有人能帮忙吗？

这是我目前正在遵循的文档：

如果这有帮助，这是完整的错误信息。

在 Gemfile 中：
  unf 被解析为 0.1.4，它依赖于
    unf_ext


Gem::Ext::BuildError：错误：构建 gem 原生扩展失败。

    当前目录：/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 找不到 ruby 的头文件，位于 /usr/lib/ruby/include/ruby.h

你可能需要安装单独的 ruby 开发环境包，例如 ruby-dev 或 ruby-devel。

extconf 失败，退出代码 1

Gem 文件将保留在 /var/lib/gems/2.7.0/gems/xorcist-1.1.2 以供检查。
结果记录在 /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'

安装 xorcist (1.1.2) 时出错，Bundler 无法继续。

在 Gemfile 中：
  xorcist
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