diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/AdditionalFixesApplyTask.java b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/AdditionalFixesApplyTask.java
index 1f7a9cc9..732c3e40 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/AdditionalFixesApplyTask.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/AdditionalFixesApplyTask.java
@@ -11,7 +11,10 @@
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.nio.file.Path;
+import java.util.List;
+import java.util.function.Predicate;
 import java.util.jar.JarFile;
+import java.util.stream.Collectors;
 import java.util.zip.ZipEntry;
 import java.util.zip.ZipInputStream;
 import java.util.zip.ZipOutputStream;
@@ -31,13 +34,33 @@ public String getName() {
     @Override
     public Path process(Path inputFile) throws IOException {
         Path out = server.launcherBinary.nextPath("post-fixed");
-        try (ClassMetadataReader reader = new ClassMetadataReader()) {
+        try (ZipOutputStream output = new ZipOutputStream(IOHelper.newOutput(out))) {
+        	apply(inputFile, inputFile, output, server, (e) -> false);
+        }
+        return out;
+    }
+
+    public static void apply(Path inputFile, Path addFile, ZipOutputStream output, LaunchServer srv, Predicate<ZipEntry> excluder) throws IOException {
+    	try (ClassMetadataReader reader = new ClassMetadataReader()) {
             reader.getCp().add(new JarFile(inputFile.toFile()));
-            try (ZipInputStream input = IOHelper.newZipInput(inputFile);
-                 ZipOutputStream output = new ZipOutputStream(IOHelper.newOutput(out))) {
+            List<JarFile> libs = srv.launcherBinary.coreLibs.stream().map(e -> {
+				try {
+					return new JarFile(e.toFile());
+				} catch (IOException e1) {
+					throw new RuntimeException(e1);			
+				}
+			}).collect(Collectors.toList());
+            libs.addAll(srv.launcherBinary.addonLibs.stream().map(e -> {
+				try {
+					return new JarFile(e.toFile());
+				} catch (IOException e1) {
+					throw new RuntimeException(e1);
+				}
+			}).collect(Collectors.toList()));
+            try (ZipInputStream input = IOHelper.newZipInput(addFile)) {
                 ZipEntry e = input.getNextEntry();
                 while (e != null) {
-                    if (e.isDirectory()) {
+                    if (e.isDirectory() || excluder.test(e)) {
                         e = input.getNextEntry();
                         continue;
                     }
@@ -49,14 +72,13 @@ public Path process(Path inputFile) throws IOException {
                             IOHelper.transfer(input, outputStream);
                             bytes = outputStream.toByteArray();
                         }
-                        output.write(classFix(bytes, reader, server.config.stripLineNumbers));
+                        output.write(classFix(bytes, reader, srv.config.stripLineNumbers));
                     } else
                         IOHelper.transfer(input, output);
                     e = input.getNextEntry();
                 }
             }
         }
-        return out;
     }
 
     private static byte[] classFix(byte[] bytes, ClassMetadataReader reader, boolean stripNumbers) {
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/AttachJarsTask.java b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/AttachJarsTask.java
index 1c10ee28..90b69574 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/AttachJarsTask.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/AttachJarsTask.java
@@ -44,26 +44,16 @@ public Path process(Path inputFile) throws IOException {
                 IOHelper.transfer(input, output);
                 e = input.getNextEntry();
             }
-            attach(output, srv.launcherBinary.coreLibs);
-            attach(output, jars);
+            attach(output, inputFile, srv.launcherBinary.coreLibs);
+            attach(output, inputFile, jars);
         }
         return outputFile;
     }
 
-    private void attach(ZipOutputStream output, List<Path> lst) throws IOException {
+    private void attach(ZipOutputStream output, Path inputFile, List<Path> lst) throws IOException {
         for (Path p : lst) {
             LogHelper.debug("Attaching: " + p);
-            try (ZipInputStream input = IOHelper.newZipInput(p)) {
-                ZipEntry e = input.getNextEntry();
-                while (e != null) {
-                    String filename = e.getName();
-                    if (exclusions.stream().noneMatch(filename::startsWith) && !e.isDirectory()) {
-                        output.putNextEntry(IOHelper.newZipEntry(e));
-                        IOHelper.transfer(input, output);
-                    }
-                    e = input.getNextEntry();
-                }
-            }
+            AdditionalFixesApplyTask.apply(inputFile, p, output, srv, (e) -> exclusions.stream().anyMatch(e.getName()::startsWith));
         }
     }
 
diff --git a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/MainBuildTask.java b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/MainBuildTask.java
index e7e9de06..06d60a01 100644
--- a/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/MainBuildTask.java
+++ b/LaunchServer/src/main/java/ru/gravit/launchserver/binary/tasks/MainBuildTask.java
@@ -207,7 +207,7 @@ public Path process(Path inputJar) throws IOException {
             jaConfigurator.compile();
             output.write(jaConfigurator.getBytecode());
         } catch (CannotCompileException | NotFoundException e) {
-            LogHelper.error(e);
+            throw new IOException(e);
         }
         reader.close();
         return outputJar;