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diff --git a/third_party/nix/doc/manual/expressions/language-operators.xml b/third_party/nix/doc/manual/expressions/language-operators.xml
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--- a/third_party/nix/doc/manual/expressions/language-operators.xml
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@@ -1,222 +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"
-      version="5.0"
-      xml:id="sec-language-operators">
-
-<title>Operators</title>
-
-<para><xref linkend='table-operators' /> lists the operators in the
-Nix expression language, in order of precedence (from strongest to
-weakest binding).</para>
-
-<table xml:id='table-operators'>
-  <title>Operators</title>
-  <tgroup cols='3'>
-    <thead>
-      <row>
-        <entry>Name</entry>
-        <entry>Syntax</entry>
-        <entry>Associativity</entry>
-        <entry>Description</entry>
-        <entry>Precedence</entry>
-      </row>
-    </thead>
-    <tbody>
-      <row>
-        <entry>Select</entry>
-        <entry><replaceable>e</replaceable> <literal>.</literal>
-        <replaceable>attrpath</replaceable>
-        [ <literal>or</literal> <replaceable>def</replaceable> ]
-        </entry>
-        <entry>none</entry>
-        <entry>Select attribute denoted by the attribute path
-        <replaceable>attrpath</replaceable> from set
-        <replaceable>e</replaceable>.  (An attribute path is a
-        dot-separated list of attribute names.)  If the attribute
-        doesn’t exist, return <replaceable>def</replaceable> if
-        provided, otherwise abort evaluation.</entry>
-        <entry>1</entry>
-      </row>
-      <row>
-        <entry>Application</entry>
-        <entry><replaceable>e1</replaceable> <replaceable>e2</replaceable></entry>
-        <entry>left</entry>
-        <entry>Call function <replaceable>e1</replaceable> with
-        argument <replaceable>e2</replaceable>.</entry>
-        <entry>2</entry>
-      </row>
-      <row>
-        <entry>Arithmetic Negation</entry>
-        <entry><literal>-</literal> <replaceable>e</replaceable></entry>
-        <entry>none</entry>
-        <entry>Arithmetic negation.</entry>
-        <entry>3</entry>
-      </row>
-      <row>
-        <entry>Has Attribute</entry>
-        <entry><replaceable>e</replaceable> <literal>?</literal>
-        <replaceable>attrpath</replaceable></entry>
-        <entry>none</entry>
-        <entry>Test whether set <replaceable>e</replaceable> contains
-        the attribute denoted by <replaceable>attrpath</replaceable>;
-        return <literal>true</literal> or
-        <literal>false</literal>.</entry>
-        <entry>4</entry>
-      </row>
-      <row>
-        <entry>List Concatenation</entry>
-        <entry><replaceable>e1</replaceable> <literal>++</literal> <replaceable>e2</replaceable></entry>
-        <entry>right</entry>
-        <entry>List concatenation.</entry>
-        <entry>5</entry>
-      </row>
-      <row>
-        <entry>Multiplication</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>*</literal> <replaceable>e2</replaceable>,
-        </entry>
-        <entry>left</entry>
-        <entry>Arithmetic multiplication.</entry>
-        <entry>6</entry>
-      </row>
-      <row>
-        <entry>Division</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>/</literal> <replaceable>e2</replaceable>
-        </entry>
-        <entry>left</entry>
-        <entry>Arithmetic division.</entry>
-        <entry>6</entry>
-      </row>
-      <row>
-        <entry>Addition</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>+</literal> <replaceable>e2</replaceable>
-        </entry>
-        <entry>left</entry>
-        <entry>Arithmetic addition.</entry>
-        <entry>7</entry>
-      </row>
-      <row>
-        <entry>Subtraction</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>-</literal> <replaceable>e2</replaceable>
-        </entry>
-        <entry>left</entry>
-        <entry>Arithmetic subtraction.</entry>
-        <entry>7</entry>
-      </row>
-      <row>
-        <entry>String Concatenation</entry>
-        <entry>
-          <replaceable>string1</replaceable> <literal>+</literal> <replaceable>string2</replaceable>
-        </entry>
-        <entry>left</entry>
-        <entry>String concatenation.</entry>
-        <entry>7</entry>
-      </row>
-      <row>
-        <entry>Not</entry>
-        <entry><literal>!</literal> <replaceable>e</replaceable></entry>
-        <entry>none</entry>
-        <entry>Boolean negation.</entry>
-        <entry>8</entry>
-      </row>
-      <row>
-        <entry>Update</entry>
-        <entry><replaceable>e1</replaceable> <literal>//</literal>
-        <replaceable>e2</replaceable></entry>
-        <entry>right</entry>
-        <entry>Return a set consisting of the attributes in
-        <replaceable>e1</replaceable> and
-        <replaceable>e2</replaceable> (with the latter taking
-        precedence over the former in case of equally named
-        attributes).</entry>
-        <entry>9</entry>
-      </row>
-      <row>
-        <entry>Less Than</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>&lt;</literal> <replaceable>e2</replaceable>,
-        </entry>
-        <entry>none</entry>
-        <entry>Arithmetic comparison.</entry>
-        <entry>10</entry>
-      </row>
-      <row>
-        <entry>Less Than or Equal To</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>&lt;=</literal> <replaceable>e2</replaceable>
-        </entry>
-        <entry>none</entry>
-        <entry>Arithmetic comparison.</entry>
-        <entry>10</entry>
-      </row>
-      <row>
-        <entry>Greater Than</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>&gt;</literal> <replaceable>e2</replaceable>
-        </entry>
-        <entry>none</entry>
-        <entry>Arithmetic comparison.</entry>
-        <entry>10</entry>
-      </row>
-      <row>
-        <entry>Greater Than or Equal To</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>&gt;=</literal> <replaceable>e2</replaceable>
-        </entry>
-        <entry>none</entry>
-        <entry>Arithmetic comparison.</entry>
-        <entry>10</entry>
-      </row>
-      <row>
-        <entry>Equality</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>==</literal> <replaceable>e2</replaceable>
-        </entry>
-        <entry>none</entry>
-        <entry>Equality.</entry>
-        <entry>11</entry>
-      </row>
-      <row>
-        <entry>Inequality</entry>
-        <entry>
-          <replaceable>e1</replaceable> <literal>!=</literal> <replaceable>e2</replaceable>
-        </entry>
-        <entry>none</entry>
-        <entry>Inequality.</entry>
-        <entry>11</entry>
-      </row>
-      <row>
-        <entry>Logical AND</entry>
-        <entry><replaceable>e1</replaceable> <literal>&amp;&amp;</literal>
-        <replaceable>e2</replaceable></entry>
-        <entry>left</entry>
-        <entry>Logical AND.</entry>
-        <entry>12</entry>
-      </row>
-      <row>
-        <entry>Logical OR</entry>
-        <entry><replaceable>e1</replaceable> <literal>||</literal>
-        <replaceable>e2</replaceable></entry>
-        <entry>left</entry>
-        <entry>Logical OR.</entry>
-        <entry>13</entry>
-      </row>
-      <row>
-        <entry>Logical Implication</entry>
-        <entry><replaceable>e1</replaceable> <literal>-></literal>
-        <replaceable>e2</replaceable></entry>
-        <entry>none</entry>
-        <entry>Logical implication (equivalent to
-        <literal>!<replaceable>e1</replaceable> ||
-        <replaceable>e2</replaceable></literal>).</entry>
-        <entry>14</entry>
-      </row>
-    </tbody>
-  </tgroup>
-</table>
-
-</section>