diff --git a/package.json b/package.json
index 607a8b4..c4f6532 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,7 @@
   "name": "patcher",
   "main": "dist/index.js",
   "scripts": {
-    "start": "rm -rf dist && tsc && node dist/index.js",
+    "start": "rm -rf dist && tsc",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "devDependencies": {
diff --git a/src/ssn/extractFileStream.ts b/src/ssn/extractFileStream.ts
index 43f9899..7e7dab9 100644
--- a/src/ssn/extractFileStream.ts
+++ b/src/ssn/extractFileStream.ts
@@ -11,18 +11,18 @@ import streamSetMaxLength from './streams/streamSetMaxLength';
  * and must transparently span across multiple disks if necessary.
  */
 export default function extractFileStream(file: ISsnFileEntry, inputStream: stream.Readable): stream.Readable {
-  const headerBuffer: Buffer = inputStream.read(30);
-  const localFileHeader = new DataView(headerBuffer.buffer);
+  const localFileHeader: Buffer = inputStream.read(30);
 
   //Local file header signature
-  if (localFileHeader.getUint32(0, true) !== 0x04034B50) {
-    throw new Error('Local file header had wrong magic');
+  const magic = localFileHeader.readUInt32LE(0);
+  if (magic !== 0x04034B50) {
+    throw new Error(`Local file header had wrong magic; expected 0x04034B50 but got 0x${magic.toString(16).padStart(8, '0')}`);
   }
   //All fields in the local file header are copies of the central file header, so we can skip them.
   //FIXME: Maybe we should actually read these fields to verify that they are identical?
   //skip 22 bytes
-  const localFilenameSize = localFileHeader.getUint16(26, true);
-  const localExtraSize = localFileHeader.getUint16(28, true);
+  const localFilenameSize = localFileHeader.readUInt16LE(26);
+  const localExtraSize = localFileHeader.readUInt16LE(28);
 
   //skip local file name and extra field
   inputStream.read(localFilenameSize + localExtraSize);