diff --git a/index.js b/index.js
index 7c2b6ddb..18da6912 100644
--- a/index.js
+++ b/index.js
@@ -1,10 +1,10 @@
-const { basename, extname, posix, relative } = require('path');
+const { basename, extname, relative } = require('path');
 const { compile, preprocess } = require('svelte');
 const { getOptions } = require('loader-utils');
-const { statSync, utimesSync, writeFileSync } = require('fs');
-const { tmpdir } = require('os');
+const VirtualModulesPlugin = require('webpack-virtual-modules');
 
 const hotApi = require.resolve('./lib/hot-api.js');
+const virtualModules = new VirtualModulesPlugin();
 
 function makeHot(id, code, hotOptions) {
 	const options = JSON.stringify(hotOptions);
@@ -107,18 +107,19 @@ module.exports = function(source, map) {
 	options.preprocess.filename = options.filename;
 
 	preprocess(source, options.preprocess).then(processed => {
-		let { js, css, ast } = normalize(compile(processed.toString(), options));
+		let { js, css } = normalize(compile(processed.toString(), options));
 
 		if (options.emitCss && css.code) {
-			const posixTmpdir = posixify(tmpdir());
-			const tmpFile = posix.join(posixTmpdir, 'svelte-' + ast.hash + '.css');
-
+			const cssFilepath = options.filename.replace(
+				/\.[^/.]+$/,
+				`.svelte.css`
+			);
 			css.code += '\n/*# sourceMappingURL=' + css.map.toUrl() + '*/';
-			js.code = js.code + `\nrequire('${tmpFile}');\n`;
-
-			writeFileSync(tmpFile, css.code);
-			const { atime, mtime } = statSync(tmpFile);
-			utimesSync(tmpFile, new Date(atime.getTime() - 99999), new Date(mtime.getTime() - 99999));
+			js.code = js.code + `\nrequire('${cssFilepath}');\n`;
+			/** If the webpack compiler is initialized, write the file to its vitual file system */
+			if (this.fs) {
+				virtualModules.writeModule(cssFilepath, css.code);
+			}
 		}
 
 		if (options.hotReload && !isProduction && !isServer) {
@@ -134,3 +135,6 @@ module.exports = function(source, map) {
 		callback(new Error(`${err.name}: ${err.toString()}`));
 	});
 };
+
+module.exports.plugin = virtualModules;
+module.exports.loader = __filename;
diff --git a/package-lock.json b/package-lock.json
index f7d8eb91..2aad6d52 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,13 +1,13 @@
 {
   "name": "svelte-loader",
-  "version": "2.5.1",
+  "version": "2.8.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
     "acorn": {
-      "version": "5.2.1",
-      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.2.1.tgz",
-      "integrity": "sha512-jG0u7c4Ly+3QkkW18V+NRDN+4bWHdln30NL1ZL2AvFZZmQe/BfopYCtghCKKVBUSetZ4QKcyA0pY6/4Gw8Pv8w==",
+      "version": "5.5.3",
+      "resolved": "https://registry.npmjs.org/acorn/-/acorn-5.5.3.tgz",
+      "integrity": "sha512-jd5MkIUlbbmb07nXH0DT3y7rDVtkzDi4XZOUVWAer8ajmF/DTSSbl5oNFyDOl/OXA33Bl79+ypHhl2pN20VeOQ==",
       "dev": true
     },
     "acorn-jsx": {
@@ -62,9 +62,9 @@
       "dev": true
     },
     "argparse": {
-      "version": "1.0.9",
-      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.9.tgz",
-      "integrity": "sha1-c9g7wmP4bpf4zE9rrhsOkKfSLIY=",
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
       "dev": true,
       "requires": {
         "sprintf-js": "1.0.3"
@@ -92,9 +92,9 @@
       "dev": true
     },
     "assertion-error": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.0.2.tgz",
-      "integrity": "sha1-E8pRXYYgbaC6xm6DTdOX2HWBCUw=",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/assertion-error/-/assertion-error-1.1.0.tgz",
+      "integrity": "sha512-jgsaNduz+ndvGyFt3uSuWqvy4lCnIJiovtouQN5JZHOKCS2QuhEdbcQHFhVksz2N2U9hXJo8odG7ETyWlEeuDw==",
       "dev": true
     },
     "babel-code-frame": {
@@ -120,9 +120,9 @@
       "integrity": "sha512-+hN/Zh2D08Mx65pZ/4g5bsmNiZUuChDiQfTUQ7qJr4/kuopCr88xZsAXv6mBoZEsUI4OuGHlX59qE94K2mMW8Q=="
     },
     "brace-expansion": {
-      "version": "1.1.8",
-      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.8.tgz",
-      "integrity": "sha1-wHshHHyVLsH479Uad+8NHTmQopI=",
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
       "dev": true,
       "requires": {
         "balanced-match": "1.0.0",
@@ -135,6 +135,12 @@
       "integrity": "sha1-81HTKWnTL6XXpVZxVCY9korjvR8=",
       "dev": true
     },
+    "buffer-from": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.0.0.tgz",
+      "integrity": "sha512-83apNb8KK0Se60UE1+4Ukbe3HbfELJ6UlI4ldtOGs7So4KD26orJM8hIY9lxdzP+UpItH1Yh/Y8GUvNFWFFRxA==",
+      "dev": true
+    },
     "caller-path": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/caller-path/-/caller-path-0.1.0.tgz",
@@ -156,7 +162,7 @@
       "integrity": "sha1-TQJjewZ/6Vi9v906QOxW/vc3Mkc=",
       "dev": true,
       "requires": {
-        "assertion-error": "1.0.2",
+        "assertion-error": "1.1.0",
         "deep-eql": "0.1.3",
         "type-detect": "1.0.0"
       }
@@ -223,13 +229,14 @@
       "dev": true
     },
     "concat-stream": {
-      "version": "1.6.0",
-      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.0.tgz",
-      "integrity": "sha1-CqxmL9Ur54lk1VMvaUeE5wEQrPc=",
+      "version": "1.6.2",
+      "resolved": "https://registry.npmjs.org/concat-stream/-/concat-stream-1.6.2.tgz",
+      "integrity": "sha512-27HBghJxjiZtIk3Ycvn/4kbJk/1uZuJFfuPEns6LaEvpvG1f0hTea8lilrouyo9mVc2GWdcEZ8OLoGmSADlrCw==",
       "dev": true,
       "requires": {
+        "buffer-from": "1.0.0",
         "inherits": "2.0.3",
-        "readable-stream": "2.3.3",
+        "readable-stream": "2.3.6",
         "typedarray": "0.0.6"
       }
     },
@@ -245,7 +252,7 @@
       "integrity": "sha1-dUu1v+VUUdpppYuU1F9MWwRi1Y8=",
       "dev": true,
       "requires": {
-        "es5-ext": "0.10.37"
+        "es5-ext": "0.10.42"
       }
     },
     "debug": {
@@ -288,7 +295,7 @@
       "requires": {
         "globby": "5.0.0",
         "is-path-cwd": "1.0.0",
-        "is-path-in-cwd": "1.0.0",
+        "is-path-in-cwd": "1.0.1",
         "object-assign": "4.1.1",
         "pify": "2.3.0",
         "pinkie-promise": "2.0.1",
@@ -302,9 +309,9 @@
       "dev": true
     },
     "doctrine": {
-      "version": "2.0.2",
-      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-2.0.2.tgz",
-      "integrity": "sha512-y0tm5Pq6ywp3qSTZ1vPgVdAnbDEoeoc5wlOHXoY1c4Wug/a7JvqHIl7BTvwodaHmejWkK/9dSb3sCYfyo/om8A==",
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/doctrine/-/doctrine-2.1.0.tgz",
+      "integrity": "sha512-35mSku4ZXK0vfCuHEDAwt55dg2jNajHZ1odvF+8SSr82EsZY4QmXfuWso8oEd8zRhVObSN18aM0CjSdoBX7zIw==",
       "dev": true,
       "requires": {
         "esutils": "2.0.2"
@@ -316,13 +323,14 @@
       "integrity": "sha1-TapNnbAPmBmIDHn6RXrlsJof04k="
     },
     "es5-ext": {
-      "version": "0.10.37",
-      "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.37.tgz",
-      "integrity": "sha1-DudB0Ui4AGm6J9AgOTdWryV978M=",
+      "version": "0.10.42",
+      "resolved": "https://registry.npmjs.org/es5-ext/-/es5-ext-0.10.42.tgz",
+      "integrity": "sha512-AJxO1rmPe1bDEfSR6TJ/FgMFYuTBhR5R57KW58iCkYACMyFbrkqVyzXSurYoScDGvgyMpk7uRF/lPUPPTmsRSA==",
       "dev": true,
       "requires": {
         "es6-iterator": "2.0.3",
-        "es6-symbol": "3.1.1"
+        "es6-symbol": "3.1.1",
+        "next-tick": "1.0.0"
       }
     },
     "es6-iterator": {
@@ -332,7 +340,7 @@
       "dev": true,
       "requires": {
         "d": "1.0.0",
-        "es5-ext": "0.10.37",
+        "es5-ext": "0.10.42",
         "es6-symbol": "3.1.1"
       }
     },
@@ -343,7 +351,7 @@
       "dev": true,
       "requires": {
         "d": "1.0.0",
-        "es5-ext": "0.10.37",
+        "es5-ext": "0.10.42",
         "es6-iterator": "2.0.3",
         "es6-set": "0.1.5",
         "es6-symbol": "3.1.1",
@@ -357,7 +365,7 @@
       "dev": true,
       "requires": {
         "d": "1.0.0",
-        "es5-ext": "0.10.37",
+        "es5-ext": "0.10.42",
         "es6-iterator": "2.0.3",
         "es6-symbol": "3.1.1",
         "event-emitter": "0.3.5"
@@ -370,7 +378,7 @@
       "dev": true,
       "requires": {
         "d": "1.0.0",
-        "es5-ext": "0.10.37"
+        "es5-ext": "0.10.42"
       }
     },
     "es6-weak-map": {
@@ -380,7 +388,7 @@
       "dev": true,
       "requires": {
         "d": "1.0.0",
-        "es5-ext": "0.10.37",
+        "es5-ext": "0.10.42",
         "es6-iterator": "2.0.3",
         "es6-symbol": "3.1.1"
       }
@@ -399,7 +407,7 @@
       "requires": {
         "es6-map": "0.1.5",
         "es6-weak-map": "2.0.2",
-        "esrecurse": "4.2.0",
+        "esrecurse": "4.2.1",
         "estraverse": "4.2.0"
       }
     },
@@ -411,26 +419,26 @@
       "requires": {
         "babel-code-frame": "6.26.0",
         "chalk": "1.1.3",
-        "concat-stream": "1.6.0",
+        "concat-stream": "1.6.2",
         "debug": "2.6.9",
-        "doctrine": "2.0.2",
+        "doctrine": "2.1.0",
         "escope": "3.6.0",
-        "espree": "3.5.2",
-        "esquery": "1.0.0",
+        "espree": "3.5.4",
+        "esquery": "1.0.1",
         "estraverse": "4.2.0",
         "esutils": "2.0.2",
         "file-entry-cache": "2.0.0",
         "glob": "7.1.2",
         "globals": "9.18.0",
-        "ignore": "3.3.7",
+        "ignore": "3.3.8",
         "imurmurhash": "0.1.4",
         "inquirer": "0.12.0",
-        "is-my-json-valid": "2.16.1",
-        "is-resolvable": "1.0.1",
-        "js-yaml": "3.10.0",
+        "is-my-json-valid": "2.17.2",
+        "is-resolvable": "1.1.0",
+        "js-yaml": "3.11.0",
         "json-stable-stringify": "1.0.1",
         "levn": "0.3.0",
-        "lodash": "4.17.4",
+        "lodash": "4.17.10",
         "mkdirp": "0.5.1",
         "natural-compare": "1.4.0",
         "optionator": "0.8.2",
@@ -447,21 +455,21 @@
       }
     },
     "eslint-plugin-mocha": {
-      "version": "4.11.0",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-mocha/-/eslint-plugin-mocha-4.11.0.tgz",
-      "integrity": "sha1-kRk6L1XiCl41l0BUoAidMBmO5Xg=",
+      "version": "4.12.1",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-mocha/-/eslint-plugin-mocha-4.12.1.tgz",
+      "integrity": "sha512-hxWtYHvLA0p/PKymRfDYh9Mxt5dYkg2Goy1vZDarTEEYfELP9ksga7kKG1NUKSQy27C8Qjc7YrSWTLUhOEOksA==",
       "dev": true,
       "requires": {
-        "ramda": "0.24.1"
+        "ramda": "0.25.0"
       }
     },
     "espree": {
-      "version": "3.5.2",
-      "resolved": "https://registry.npmjs.org/espree/-/espree-3.5.2.tgz",
-      "integrity": "sha512-sadKeYwaR/aJ3stC2CdvgXu1T16TdYN+qwCpcWbMnGJ8s0zNWemzrvb2GbD4OhmJ/fwpJjudThAlLobGbWZbCQ==",
+      "version": "3.5.4",
+      "resolved": "https://registry.npmjs.org/espree/-/espree-3.5.4.tgz",
+      "integrity": "sha512-yAcIQxtmMiB/jL32dzEp2enBeidsB7xWPLNiw3IIkpVds1P+h7qF9YwJq1yUNzp2OKXgAprs4F61ih66UsoD1A==",
       "dev": true,
       "requires": {
-        "acorn": "5.2.1",
+        "acorn": "5.5.3",
         "acorn-jsx": "3.0.1"
       }
     },
@@ -472,22 +480,21 @@
       "dev": true
     },
     "esquery": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/esquery/-/esquery-1.0.0.tgz",
-      "integrity": "sha1-z7qLV9f7qT8XKYqKAGoEzaE9gPo=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/esquery/-/esquery-1.0.1.tgz",
+      "integrity": "sha512-SmiyZ5zIWH9VM+SRUReLS5Q8a7GxtRdxEBVZpm98rJM7Sb+A9DVCndXfkeFUd3byderg+EbDkfnevfCwynWaNA==",
       "dev": true,
       "requires": {
         "estraverse": "4.2.0"
       }
     },
     "esrecurse": {
-      "version": "4.2.0",
-      "resolved": "https://registry.npmjs.org/esrecurse/-/esrecurse-4.2.0.tgz",
-      "integrity": "sha1-+pVo2Y04I/mkHZHpAtyrnqblsWM=",
+      "version": "4.2.1",
+      "resolved": "https://registry.npmjs.org/esrecurse/-/esrecurse-4.2.1.tgz",
+      "integrity": "sha512-64RBB++fIOAXPw3P9cy89qfMlvZEXZkqqJkjqqXIvzP5ezRZjW+lPWjw35UX/3EhUPFYbg5ER4JYgDw4007/DQ==",
       "dev": true,
       "requires": {
-        "estraverse": "4.2.0",
-        "object-assign": "4.1.1"
+        "estraverse": "4.2.0"
       }
     },
     "estraverse": {
@@ -509,7 +516,7 @@
       "dev": true,
       "requires": {
         "d": "1.0.0",
-        "es5-ext": "0.10.37"
+        "es5-ext": "0.10.42"
       }
     },
     "exit-hook": {
@@ -660,9 +667,9 @@
       "dev": true
     },
     "ignore": {
-      "version": "3.3.7",
-      "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.7.tgz",
-      "integrity": "sha512-YGG3ejvBNHRqu0559EOxxNFihD0AjpvHlC/pdGKd3X3ofe+CoJkYazwNJYTNebqpPKN+VVQbh4ZFn1DivMNuHA==",
+      "version": "3.3.8",
+      "resolved": "https://registry.npmjs.org/ignore/-/ignore-3.3.8.tgz",
+      "integrity": "sha512-pUh+xUQQhQzevjRHHFqqcTy0/dP/kS9I8HSrUydhihjuD09W6ldVWFtIrwhXdUJHis3i2rZNqEHpZH/cbinFbg==",
       "dev": true
     },
     "imurmurhash": {
@@ -699,7 +706,7 @@
         "cli-cursor": "1.0.2",
         "cli-width": "2.2.0",
         "figures": "1.7.0",
-        "lodash": "4.17.4",
+        "lodash": "4.17.10",
         "readline2": "1.0.1",
         "run-async": "0.1.0",
         "rx-lite": "3.1.2",
@@ -723,14 +730,21 @@
         "number-is-nan": "1.0.1"
       }
     },
+    "is-my-ip-valid": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/is-my-ip-valid/-/is-my-ip-valid-1.0.0.tgz",
+      "integrity": "sha512-gmh/eWXROncUzRnIa1Ubrt5b8ep/MGSnfAUI3aRp+sqTCs1tv1Isl8d8F6JmkN3dXKc3ehZMrtiPN9eL03NuaQ==",
+      "dev": true
+    },
     "is-my-json-valid": {
-      "version": "2.16.1",
-      "resolved": "https://registry.npmjs.org/is-my-json-valid/-/is-my-json-valid-2.16.1.tgz",
-      "integrity": "sha512-ochPsqWS1WXj8ZnMIV0vnNXooaMhp7cyL4FMSIPKTtnV0Ha/T19G2b9kkhcNsabV9bxYkze7/aLZJb/bYuFduQ==",
+      "version": "2.17.2",
+      "resolved": "https://registry.npmjs.org/is-my-json-valid/-/is-my-json-valid-2.17.2.tgz",
+      "integrity": "sha512-IBhBslgngMQN8DDSppmgDv7RNrlFotuuDsKcrCP3+HbFaVivIBU7u9oiiErw8sH4ynx3+gOGQ3q2otkgiSi6kg==",
       "dev": true,
       "requires": {
         "generate-function": "2.0.0",
         "generate-object-property": "1.2.0",
+        "is-my-ip-valid": "1.0.0",
         "jsonpointer": "4.0.1",
         "xtend": "4.0.1"
       }
@@ -742,9 +756,9 @@
       "dev": true
     },
     "is-path-in-cwd": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/is-path-in-cwd/-/is-path-in-cwd-1.0.0.tgz",
-      "integrity": "sha1-ZHdYK4IU1gI0YJRWcAO+ip6sBNw=",
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/is-path-in-cwd/-/is-path-in-cwd-1.0.1.tgz",
+      "integrity": "sha512-FjV1RTW48E7CWM7eE/J2NJvAEEVektecDBVBE5Hh3nM1Jd0kvhHtX68Pr3xsDf857xt3Y4AkwVULK1Vku62aaQ==",
       "dev": true,
       "requires": {
         "is-path-inside": "1.0.1"
@@ -766,9 +780,9 @@
       "dev": true
     },
     "is-resolvable": {
-      "version": "1.0.1",
-      "resolved": "https://registry.npmjs.org/is-resolvable/-/is-resolvable-1.0.1.tgz",
-      "integrity": "sha512-y5CXYbzvB3jTnWAZH1Nl7ykUWb6T3BcTs56HUruwBf8MhF56n1HWqhDWnVFo8GHrUPDgvUUNVhrc2U8W7iqz5g==",
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/is-resolvable/-/is-resolvable-1.1.0.tgz",
+      "integrity": "sha512-qgDYXFSR5WvEfuS5dMj6oTMEbrrSaM0CrFk2Yiq/gXnBvD9pMa2jGXxyhGLfvhZpuMZe18CJpFxAt3CRs42NMg==",
       "dev": true
     },
     "isarray": {
@@ -784,12 +798,12 @@
       "dev": true
     },
     "js-yaml": {
-      "version": "3.10.0",
-      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.10.0.tgz",
-      "integrity": "sha512-O2v52ffjLa9VeM43J4XocZE//WT9N0IiwDa3KSHH7Tu8CtH+1qM8SIZvnsTh6v+4yFy5KUY3BHUVwjpfAWsjIA==",
+      "version": "3.11.0",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.11.0.tgz",
+      "integrity": "sha512-saJstZWv7oNeOyBh3+Dx1qWzhW0+e6/8eDzo7p5rDFqxntSztloLtuKu+Ejhtq82jsilwOIZYsCz+lIjthg1Hw==",
       "dev": true,
       "requires": {
-        "argparse": "1.0.9",
+        "argparse": "1.0.10",
         "esprima": "4.0.0"
       }
     },
@@ -846,9 +860,9 @@
       }
     },
     "lodash": {
-      "version": "4.17.4",
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-      "integrity": "sha1-0lCRrmltwkFX+ZgGDWdulWQ7UPY="
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@@ -1467,6 +1473,24 @@
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diff --git a/package.json b/package.json
index 0bde836e..e36bb82d 100644
--- a/package.json
+++ b/package.json
@@ -16,8 +16,8 @@
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