diff --git a/packages/build/build/build.js b/packages/build/build/build.js
index 991e845..6816966 100644
--- a/packages/build/build/build.js
+++ b/packages/build/build/build.js
@@ -1,5 +1,5 @@
 const {realpath} = require('fs/promises');
-const {dirname, join} = require('path');
+const {dirname, join, relative} = require('path');
 
 const D = require('@flecks/core/build/debug');
 const {Flecks} = require('@flecks/core/build/flecks');
@@ -279,7 +279,7 @@ module.exports = class Build extends Flecks {
     return this.resolver.resolve(join(fleck, 'build', config));
   }
 
-  async runtimeCompiler(runtime, config, {allowlist = []} = {}) {
+  async runtimeCompiler(runtime, config, {additionalModuleDirs = [], allowlist = []} = {}) {
     // Compile?
     const needCompilation = Object.entries(this.compiled);
     if (needCompilation.length > 0) {
@@ -300,13 +300,10 @@ module.exports = class Build extends Flecks {
             // Alias.
             config.resolve.alias[path] = source || path;
             // Root aliases.
-            if (root) {
-              config.resolve.alias[
-                join(root, 'node_modules')
-              ] = join(FLECKS_CORE_ROOT, 'node_modules');
-              config.resolve.fallback[path] = root;
-            }
-            includes.push(root || path);
+            config.resolve.fallback[path] = root;
+            config.resolve.modules.push(relative(FLECKS_CORE_ROOT, join(root, 'node_modules')));
+            additionalModuleDirs.push(relative(FLECKS_CORE_ROOT, join(root, 'node_modules')));
+            includes.push(root);
           }),
       );
       // Compile.
diff --git a/packages/build/build/explicate.js b/packages/build/build/explicate.js
index 6889a9f..5126828 100644
--- a/packages/build/build/explicate.js
+++ b/packages/build/build/explicate.js
@@ -1,7 +1,8 @@
+const {join, relative, resolve} = require('path');
+
 const {
-  join,
-  resolve,
-} = require('path');
+  FLECKS_CORE_ROOT = process.cwd(),
+} = process.env;
 
 module.exports = async function explicate(
   maybeAliasedPaths,
@@ -83,8 +84,15 @@ module.exports = async function explicate(
     if (resolved) {
       await doExplication(descriptor);
     }
+    let descriptorRequest = descriptor.request;
+    if (areDescriptorsTheSame) {
+      descriptorRequest = join(descriptorRequest, 'src');
+    }
     if (descriptor.path !== descriptor.request) {
-      resolver.addAlias(descriptor.path, descriptor.request);
+      resolver.addAlias(descriptor.path, descriptorRequest);
+      if (descriptorRequest !== descriptor.request) {
+        resolver.addFallback(descriptor.path, descriptor.request);
+      }
     }
     await Promise.all(
       platforms
@@ -100,10 +108,10 @@ module.exports = async function explicate(
               resolver.addAlias(path, request);
             }
           }
-          else if (await resolver.resolve(join(descriptor.request, 'src', platform))) {
+          else if (await resolver.resolve(join(descriptorRequest, 'src', platform))) {
             const [path, request] = [
               join(descriptor.path, platform),
-              join(descriptor.request, 'src', platform),
+              join(descriptorRequest, 'src', platform),
             ];
             await doExplication({path, request});
             if (path !== request) {
@@ -119,7 +127,10 @@ module.exports = async function explicate(
     if (!rootDescriptor || roots[rootDescriptor.request]) {
       return;
     }
-    const {request} = rootDescriptor;
+    const {path, request} = rootDescriptor;
+    if (path !== request) {
+      resolver.addModules(relative(FLECKS_CORE_ROOT, join(request, 'node_modules')));
+    }
     roots[request] = true;
     // Import bootstrap script.
     const bootstrapPath = await resolver.resolve(join(request, 'build', 'flecks.bootstrap'));
diff --git a/packages/build/build/resolver.js b/packages/build/build/resolver.js
index 02f6ac1..45a08c5 100644
--- a/packages/build/build/resolver.js
+++ b/packages/build/build/resolver.js
@@ -4,6 +4,7 @@ const D = require('@flecks/core/build/debug');
 const {CachedInputFileSystem, ResolverFactory} = require('enhanced-resolve');
 const AppendPlugin = require('enhanced-resolve/lib/AppendPlugin');
 const AliasPlugin = require('enhanced-resolve/lib/AliasPlugin');
+const ModulesInHierarchicalDirectoriesPlugin = require('enhanced-resolve/lib/ModulesInHierarchicalDirectoriesPlugin');
 const fs = require('graceful-fs');
 
 const debug = D('@flecks/build/build/resolver');
@@ -27,10 +28,7 @@ module.exports = class Resolver {
       extensions: ['.js', '.json', '.node'],
       fileSystem: nodeFileSystem,
       symlinks: false,
-      ...{
-        modules: [join(FLECKS_CORE_ROOT, 'node_modules')],
-        ...options,
-      },
+      ...options,
     });
   }
 
@@ -59,6 +57,15 @@ module.exports = class Resolver {
     ).apply(this.resolver);
   }
 
+  addModules(path) {
+    debugSilly("adding modules: '%s'", path);
+    new ModulesInHierarchicalDirectoriesPlugin(
+      "raw-module",
+      path,
+      "module"
+    ).apply(this.resolver);
+  }
+
   static isResolutionError(error) {
     return error.message.startsWith("Can't resolve");
   }
diff --git a/packages/build/build/webpack.js b/packages/build/build/webpack.js
index 22ca5f2..ece8153 100644
--- a/packages/build/build/webpack.js
+++ b/packages/build/build/webpack.js
@@ -44,6 +44,7 @@ exports.defaultConfig = (flecks, specializedConfig) => {
       alias: {},
       extensions,
       fallback: {},
+      modules: ['node_modules'],
     },
     stats: {
       colors: true,