ption"/>
      </rule>
      <rule pattern="(dependencyClosure|fetchTarball|filterSource|currentTime|removeAttrs|baseNameOf|derivation|toString|builtins|getAttr|hasAttr|getEnv|isNull|abort|dirOf|toXML|map)(?![a-zA-Z0-9_&#39;-])">
        <token type="NameBuiltin"/>
      </rule>
    </state>
    <state name="literals">
      <rule pattern="(false|true|null)(?![a-zA-Z0-9_&#39;-])">
        <token type="NameConstant"/>
      </rule>
      <rule>
        <include state="uri"/>
      </rule>
      <rule>
        <include state="path"/>
      </rule>
      <rule>
        <include state="int"/>
      </rule>
      <rule>
        <include state="float"/>
      </rule>
    </state>
    <state name="keywords">
      <rule pattern="import(?![a-zA-Z0-9_&#39;-])">
        <token type="KeywordNamespace"/>
      </rule>
      <rule pattern="(inherit|assert|with|then|else|rec|if)(?![a-zA-Z0-9_&#39;-])">
        <token type="Keyword"/>
      </rule>
    </state>
    <state name="list">
      <rule pattern="\]">
        <token type="Punctuation"/>
        <pop depth="1"/>
      </rule>
      <rule>
        <include state="root"/>
      </rule>
    </state>
    <state name="operators">
      <rule pattern=" [/-] ">
        <token type="Operator"/>
      </rule>
      <rule pattern="(\.)(\${)">
        <bygroups>
          <token type="Operator"/>
          <token type="LiteralStringInterpol"/>
        </bygroups>
        <push state="interpol"/>
      </rule>
      <rule pattern="(\?)(\s*)(\${)">
        <bygroups>
          <token type="Operator"/>
          <token type="Text"/>
          <token type="LiteralStringInterpol"/>
        </bygroups>
        <push state="interpol"/>
      </rule>
      <rule pattern="(&amp;&amp;|&gt;=|&lt;=|\+\+|-&gt;|!=|\|\||//|==|@|!|\+|\?|&lt;|\.|&gt;|\*)">
        <token type="Operator"/>
      </rule>
      <rule pattern="[;:]">
        <token type="Punctuation"/>
      </rule>
    </state>
    <state name="comment">
      <rule pattern="\*/">
        <token type="CommentMultiline"/>
        <pop depth="1"/>
      </rule>
      <rule pattern=".|\n">
        <token type="CommentMultiline"/>
      </rule>
    </state>
    <state name="interpol">
      <rule pattern="}">
        <token type="LiteralStringInterpol"/>
        <pop depth="1"/>
      </rule>
      <rule>
        <include state="root"/>
      </rule>
    </state>
    <state name="path">
      <rule pattern="[a-zA-Z0-9._+-]*(/[a-zA-Z0-9._+-]+)+">
        <token type="LiteralStringRegex"/>
      </rule>
      <rule pattern="~(/[a-zA-Z0-9._+-]+)+/?">
        <token type="LiteralStringRegex"/>
      </rule>
      <rule pattern="&lt;[a-zA-Z0-9._+-]+(/[a-zA-Z0-9._+-]+)*&gt;">
        <token type="LiteralStringRegex"/>
      </rule>
    </state>
    <state name="float">
      <rule pattern="-?(([1-9][0-9]*\.[0-9]*)|(0?\.[0-9]+))([Ee][+-]?[0-9]+)?(?![a-zA-Z0-9_&#39;-])">
        <token type="LiteralNumberFloat"/>
      </rule>
    </state>
    <state name="root">
      <rule>
        <include state="keywords"/>
      </rule>
      <rule>
        <include state="builtins"/>
      </rule>
      <rule>
        <include state="literals"/>
      </rule>
      <rule>
        <include state="operators"/>
      </rule>
      <rule pattern="#.*$">
        <token type="CommentSingle"/>
      </rule>
      <rule pattern="/\*">
        <token type="CommentMultiline"/>
        <push state="comment"/>
      </rule>
      <rule pattern="\(">
        <token type="Punctuation"/>
        <push state="paren"/>
      </rule>
      <rule pattern="\[">
        <token type="Punctuation"/>
        <push state="list"/>
      </rule>
      <rule pattern="&#34;">
        <token type="LiteralStringDouble"/>
        <push state="qstring"/>
      </rule>
      <rule pattern="&#39;&#39;">
        <token type="LiteralStringSingle"/>
        <push state="istring"/>
      </rule>
      <rule pattern="{">
        <token type="Punctuation"/>
        <push state="scope"/>
      </rule>
      <rule pattern="let(?![a-zA-Z0-9_&#39;-])">
        <token type="Keyword"/>
        <push state="scope"/>
      </rule>
      <rule>
        <include state="id"/>
      </rule>
      <rule>
        <include state="space"/>
      </rule>
    </state>
    <state name="int">
      <rule pattern="-?[0-9]+(?![a-zA-Z0-9_&#39;-])">
        <token type="LiteralNumberInteger"/>
      </rule>
    </state>
    <state name="uri">
      <rule pattern="[a-zA-Z][a-zA-Z0-9+.-]*:[a-zA-Z0-9%/?:@&amp;=+$,_.!~*&#39;-]+">
        <token type="LiteralStringDoc"/>
      </rule>
    </state>
    <state name="qstring">
      <rule pattern="&#34;">
        <token type="LiteralStringDouble"/>
        <pop depth="1"/>
      </rule>
      <rule pattern="\${">
        <token type="LiteralStringInterpol"/>
        <push state="interpol"/>
      </rule>
      <rule pattern="\\.">
        <token type="LiteralStringEscape"/>
      </rule>
      <rule pattern=".|\n">
        <token type="LiteralStringDouble"/>
      </rule>
    </state>
    <state name="istring">
      <rule pattern="&#39;&#39;\$">
        <token type="LiteralStringEscape"/>
      </rule>
      <rule pattern="&#39;&#39;&#39;">
        <token type="LiteralStringEscape"/>
      </rule>
      <rule pattern="&#39;&#39;\\.">
        <token type="LiteralStringEscape"/>
      </rule>
      <rule pattern="&#39;&#39;">
        <token type="LiteralStringSingle"/>
        <pop depth="1"/>
      </rule>
      <rule pattern="\${">
        <token type="LiteralStringInterpol"/>
        <push state="interpol"/>
      </rule>
      <rule pattern="\$.">
        <token type="LiteralStringSingle"/>
      </rule>
      <rule pattern=".|\n">
        <token type="LiteralStringSingle"/>
      </rule>
    </state>
    <state name="id">
      <rule pattern="[a-zA-Z_][a-zA-Z0-9_&#39;-]*">
        <token type="Name"/>
      </rule>
    </state>
  </rules>
</lexer>