source: node_modules/prismjs/components/prism-nix.js@ d24f17c

Prism.languages.nix = {
        'comment': {
                pattern: /\/\*[\s\S]*?\*\/|#.*/,
                greedy: true
        },
        'string': {
                pattern: /"(?:[^"\\]|\\[\s\S])*"|''(?:(?!'')[\s\S]|''(?:'|\\|\$\{))*''/,
                greedy: true,
                inside: {
                        'interpolation': {
                                // The lookbehind ensures the ${} is not preceded by \ or ''
                                pattern: /(^|(?:^|(?!'').)[^\\])\$\{(?:[^{}]|\{[^}]*\})*\}/,
                                lookbehind: true,
                                inside: null // see below
                        }
                }
        },
        'url': [
                /\b(?:[a-z]{3,7}:\/\/)[\w\-+%~\/.:#=?&]+/,
                {
                        pattern: /([^\/])(?:[\w\-+%~.:#=?&]*(?!\/\/)[\w\-+%~\/.:#=?&])?(?!\/\/)\/[\w\-+%~\/.:#=?&]*/,
                        lookbehind: true
                }
        ],
        'antiquotation': {
                pattern: /\$(?=\{)/,
                alias: 'important'
        },
        'number': /\b\d+\b/,
        'keyword': /\b(?:assert|builtins|else|if|in|inherit|let|null|or|then|with)\b/,
        'function': /\b(?:abort|add|all|any|attrNames|attrValues|baseNameOf|compareVersions|concatLists|currentSystem|deepSeq|derivation|dirOf|div|elem(?:At)?|fetch(?:Tarball|url)|filter(?:Source)?|fromJSON|genList|getAttr|getEnv|hasAttr|hashString|head|import|intersectAttrs|is(?:Attrs|Bool|Function|Int|List|Null|String)|length|lessThan|listToAttrs|map|mul|parseDrvName|pathExists|read(?:Dir|File)|removeAttrs|replaceStrings|seq|sort|stringLength|sub(?:string)?|tail|throw|to(?:File|JSON|Path|String|XML)|trace|typeOf)\b|\bfoldl'\B/,
        'boolean': /\b(?:false|true)\b/,
        'operator': /[=!<>]=?|\+\+?|\|\||&&|\/\/|->?|[?@]/,
        'punctuation': /[{}()[\].,:;]/
};

Prism.languages.nix.string.inside.interpolation.inside = Prism.languages.nix;