diff -r 9fb23d7831da -r 88b00e03fc8f rt/mojo/src/main/java/org/apidesign/bck2brwsr/mojo/AOTLibrary.java
--- a/rt/mojo/src/main/java/org/apidesign/bck2brwsr/mojo/AOTLibrary.java	Wed Apr 15 14:32:54 2015 +0200
+++ b/rt/mojo/src/main/java/org/apidesign/bck2brwsr/mojo/AOTLibrary.java	Mon Mar 28 05:55:43 2016 +0200
@@ -18,6 +18,7 @@
 package org.apidesign.bck2brwsr.mojo;
 
 import java.io.File;
+import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.OutputStreamWriter;
@@ -141,10 +142,12 @@
                 }
             }
             
-            FileOutputStream fos = new FileOutputStream(this.aotJar);
-            JarOutputStream os = new JarOutputStream(fos, m);
 
+            JarOutputStream os = null;
             if (!"false".equals(debug)) {
+                if (os == null) {
+                    os = aotJar(m);
+                }
                 os.putNextEntry(new JarEntry(debug));
                 Writer w = new OutputStreamWriter(os, "UTF-8");
                 configureMain(loader).
@@ -154,6 +157,9 @@
                 os.closeEntry();
             }
             if (!"false".equals(minified)) {
+                if (os == null) {
+                    os = aotJar(m);
+                }
                 os.putNextEntry(new JarEntry(minified));
             
                 Writer w = new OutputStreamWriter(os, "UTF-8");
@@ -177,6 +183,9 @@
                         }
                     }
                     {
+                        if (os == null) {
+                            os = aotJar(m);
+                        }
                         os.putNextEntry(new JarEntry(artifactName(a, true)));
                         Writer w = new OutputStreamWriter(os, "UTF-8");
                         c.
@@ -197,7 +206,9 @@
                     }                    
                 }
             }
-            os.close();
+            if (os != null) {
+                os.close();
+            }
             
             projectHelper.attachArtifact(prj, "jar", "bck2brwsr", aotJar);
         } catch (IOException ex) {
@@ -205,6 +216,13 @@
         }
     }
 
+    private JarOutputStream aotJar(Manifest m) throws IOException, FileNotFoundException {
+        this.aotJar.getParentFile().mkdirs();
+        FileOutputStream fos = new FileOutputStream(this.aotJar);
+        JarOutputStream os = new JarOutputStream(fos, m);
+        return os;
+    }
+
     private Bck2Brwsr configureMain(URLClassLoader loader) throws IOException {
         Bck2Brwsr c = Bck2BrwsrJars.configureFrom(null, mainJar, loader, ignoreBootClassPath);
         if (exports != null) {