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-rw-r--r--nixpkgs/doc/languages-frameworks/ruby.section.md2
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diff --git a/nixpkgs/doc/languages-frameworks/ruby.section.md b/nixpkgs/doc/languages-frameworks/ruby.section.md
index 9527395de58f..7dede6944a3d 100644
--- a/nixpkgs/doc/languages-frameworks/ruby.section.md
+++ b/nixpkgs/doc/languages-frameworks/ruby.section.md
@@ -124,11 +124,13 @@ mkShell { buildInputs = [ gems (lowPrio gems.wrappedRuby) ]; }
 Sometimes a Gemfile references other files. Such as `.ruby-version` or vendored gems. When copying the Gemfile to the nix store we need to copy those files alongside. This can be done using `extraConfigPaths`. For example:
 
 ```nix
+{
   gems = bundlerEnv {
     name = "gems-for-some-project";
     gemdir = ./.;
     extraConfigPaths = [ "${./.}/.ruby-version" ];
   };
+}
 ```
 
 ### Gem-specific configurations and workarounds {#gem-specific-configurations-and-workarounds}