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diff --git a/doc/functions/nix-gitignore.xml b/doc/functions/nix-gitignore.xml
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@@ -1,70 +0,0 @@
-<section xmlns="http://docbook.org/ns/docbook"
-         xmlns:xlink="http://www.w3.org/1999/xlink"
-         xmlns:xi="http://www.w3.org/2001/XInclude"
-         xml:id="sec-pkgs-nix-gitignore">
- <title>pkgs.nix-gitignore</title>
-
- <para>
-  <function>pkgs.nix-gitignore</function> is a function that acts similarly to <literal>builtins.filterSource</literal> but also allows filtering with the help of the gitignore format.
- </para>
-
- <section xml:id="sec-pkgs-nix-gitignore-usage">
-  <title>Usage</title>
-
-  <para>
-   <literal>pkgs.nix-gitignore</literal> exports a number of functions, but you'll most likely need either <literal>gitignoreSource</literal> or <literal>gitignoreSourcePure</literal>. As their first argument, they both accept either 1. a file with gitignore lines or 2. a string with gitignore lines, or 3. a list of either of the two. They will be concatenated into a single big string.
-  </para>
-
-<programlisting><![CDATA[
-{ pkgs ? import <nixpkgs> {} }:
-
- nix-gitignore.gitignoreSource [] ./source
-     # Simplest version
-
- nix-gitignore.gitignoreSource "supplemental-ignores\n" ./source
-     # This one reads the ./source/.gitignore and concats the auxiliary ignores
-
- nix-gitignore.gitignoreSourcePure "ignore-this\nignore-that\n" ./source
-     # Use this string as gitignore, don't read ./source/.gitignore.
-
- nix-gitignore.gitignoreSourcePure ["ignore-this\nignore-that\n", ~/.gitignore] ./source
-     # It also accepts a list (of strings and paths) that will be concatenated
-     # once the paths are turned to strings via readFile.
-  ]]></programlisting>
-
-  <para>
-   These functions are derived from the <literal>Filter</literal> functions by setting the first filter argument to <literal>(_: _: true)</literal>:
-  </para>
-
-<programlisting><![CDATA[
-gitignoreSourcePure = gitignoreFilterSourcePure (_: _: true);
-gitignoreSource = gitignoreFilterSource (_: _: true);
-  ]]></programlisting>
-
-  <para>
-   Those filter functions accept the same arguments the <literal>builtins.filterSource</literal> function would pass to its filters, thus <literal>fn: gitignoreFilterSourcePure fn ""</literal> should be extensionally equivalent to <literal>filterSource</literal>. The file is blacklisted iff it's blacklisted by either your filter or the gitignoreFilter.
-  </para>
-
-  <para>
-   If you want to make your own filter from scratch, you may use
-  </para>
-
-<programlisting><![CDATA[
-gitignoreFilter = ign: root: filterPattern (gitignoreToPatterns ign) root;
-  ]]></programlisting>
- </section>
-
- <section xml:id="sec-pkgs-nix-gitignore-usage-recursive">
-  <title>gitignore files in subdirectories</title>
-
-  <para>
-   If you wish to use a filter that would search for .gitignore files in subdirectories, just like git does by default, use this function:
-  </para>
-
-<programlisting><![CDATA[
-gitignoreFilterRecursiveSource = filter: patterns: root:
-# OR
-gitignoreRecursiveSource = gitignoreFilterSourcePure (_: _: true);
-  ]]></programlisting>
- </section>
-</section>