diff --git a/.vscode/settings.json b/.vscode/settings.json
index 5185419..e840f59 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -7,7 +7,6 @@
   "eslint.nodePath": ".yarn/sdks",
   "typescript.enablePromptUseWorkspaceTsdk": true,
   "editor.codeActionsOnSave": {
-    "source.fixAll": true,
     "source.fixAll.eslint": true
   }
 }
diff --git a/mkshims.ts b/mkshims.ts
index 0d761c9..939ec17 100644
--- a/mkshims.ts
+++ b/mkshims.ts
@@ -1,24 +1,14 @@
-import cmdShim                    from '@zkochan/cmd-shim';
-import fs                         from 'fs';
-import {SupportedPackageManagers} from 'sources/types';
+import cmdShim                      from '@zkochan/cmd-shim';
+import fs                           from 'fs';
 
-import config                     from './config.json';
+import {Engine}                     from './sources/Engine';
+import {SupportedPackageManagerSet} from './sources/types';
+
+const engine = new Engine();
 
 async function main() {
-  for (const packageManager of Object.keys(config.definitions) as Array<SupportedPackageManagers>) {
-    const binSet = new Set<string>();
-
-    for (const spec of Object.values(config.definitions[packageManager].ranges)) {
-      if (Array.isArray(spec.bin)) {
-        for (const entry of spec.bin) {
-          binSet.add(entry);
-        }
-      } else {
-        for (const entry of Object.keys(spec.bin)) {
-          binSet.add(entry);
-        }
-      }
-    }
+  for (const packageManager of SupportedPackageManagerSet) {
+    const binSet = engine.getBinariesFor(packageManager);
 
     for (const binaryName of binSet) {
       const entryPath = `${__dirname}/dist/${binaryName}.js`;
diff --git a/sources/main.ts b/sources/main.ts
index bf49a1d..8161f1e 100644
--- a/sources/main.ts
+++ b/sources/main.ts
@@ -95,8 +95,6 @@ export function runMain(argv: Array<string>) {
   });
 }
 
-declare const __non_webpack_require__: any;
-
-if (typeof __non_webpack_require__ === `undefined` && process.mainModule === module)
+// Using `eval` to be sure that Webpack doesn't transform it
+if (process.mainModule === eval(`module`))
   runMain(process.argv.slice(2));
-