diff --git a/src/backend/src/Kernel.js b/src/backend/src/Kernel.js
index 5c2b5516a..0373e315f 100644
--- a/src/backend/src/Kernel.js
+++ b/src/backend/src/Kernel.js
@@ -36,7 +36,7 @@ const { RuntimeModuleRegistry } = require('./extension/RuntimeModuleRegistry');
 const { RuntimeModule } = require('./extension/RuntimeModule');
 const deep_proto_merge = require('./config/deep_proto_merge');
 const { kv } = require('./util/kvSingleton');
-
+const url = require('url');
 const { quot } = libs.string;
 
 class Kernel extends AdvancedBase {
@@ -452,7 +452,7 @@ class Kernel extends AdvancedBase {
     async _run_extern_mod (mod_entry) {
         let exportObject = null;
 
-        const {
+        let {
             module: mod,
             require_dir,
             context,
@@ -470,8 +470,14 @@ class Kernel extends AdvancedBase {
 
         mod.extension.name = packageJSON.name;
 
+        // Platform normalization for if import is used in the place of require();
+        let importPath = path_.join(require_dir, packageJSON.main ?? 'index.js');
+        if ( process.platform === 'win32' ) {
+            importPath = (url.pathToFileURL(importPath)).href;
+        }
+
         const maybe_promise = (typ => typ.trim().toLowerCase())(packageJSON.type ?? '') === 'module'
-            ? await import(path_.join(require_dir, packageJSON.main ?? 'index.js'))
+            ? await import(importPath)
             : require(require_dir);
 
         if ( maybe_promise && maybe_promise instanceof Promise ) {
@@ -582,8 +588,11 @@ class Kernel extends AdvancedBase {
     }
 
     async run_npm_install (path) {
-        const npmCmd = process.platform === 'win32' ? 'npm.cmd' : 'npm';
-        const proc = spawn(npmCmd, ['install'], { cwd: path, stdio: 'pipe' });
+        const npmOptions = process.platform === 'win32'
+            ? ['npm.cmd', ['install'], { shell: true, cwd: path, stdio: 'pipe' }]
+            : ['npm', ['install'], { cwd: path, stdio: 'pipe' }];
+
+        const proc = spawn(...npmOptions);
 
         let buffer = '';
 
diff --git a/src/backend/src/modules/selfhosted/DevWatcherService.js b/src/backend/src/modules/selfhosted/DevWatcherService.js
index f5fcea8b9..073304340 100644
--- a/src/backend/src/modules/selfhosted/DevWatcherService.js
+++ b/src/backend/src/modules/selfhosted/DevWatcherService.js
@@ -21,6 +21,7 @@ const BaseService = require('../../services/BaseService');
 
 const path_ = require('node:path');
 const fs = require('node:fs');
+const url = require('node:url');
 
 class ProxyLogger {
     constructor (log) {
@@ -131,7 +132,7 @@ class DevWatcherService extends BaseService {
             ['webpack.config.mjs', 'module'],
         ];
 
-        const {
+        let {
             configjsPath: webpackConfigPath,
             moduleType,
         } = await this.get_configjs({
@@ -179,6 +180,11 @@ class DevWatcherService extends BaseService {
             }
             process.env = newEnv; // Yep, it totally lets us do this
         }
+
+        if ( moduleType === 'module' && process.platform === 'win32' ) {
+            webpackConfigPath = url.pathToFileURL(webpackConfigPath).href;
+        }
+
         let webpackConfig = moduleType === 'module'
             ? (await import(webpackConfigPath)).default
             : require(webpackConfigPath);