diff --git a/launcher-builder/src/main/java/com/skcraft/launcher/builder/PackageBuilder.java b/launcher-builder/src/main/java/com/skcraft/launcher/builder/PackageBuilder.java
index 2b2e9a1..a709d82 100644
--- a/launcher-builder/src/main/java/com/skcraft/launcher/builder/PackageBuilder.java
+++ b/launcher-builder/src/main/java/com/skcraft/launcher/builder/PackageBuilder.java
@@ -26,7 +26,6 @@ import com.skcraft.launcher.model.minecraft.ReleaseList;
 import com.skcraft.launcher.model.minecraft.Version;
 import com.skcraft.launcher.model.minecraft.VersionManifest;
 import com.skcraft.launcher.model.modpack.Manifest;
-import com.skcraft.launcher.util.Environment;
 import com.skcraft.launcher.util.HttpRequest;
 import com.skcraft.launcher.util.SimpleLogFormatter;
 import lombok.Getter;
@@ -178,52 +177,57 @@ public class PackageBuilder {
             loaderLibraries.addAll(result.getLoaderLibraries());
             installerLibraries.addAll(result.getProcessorLibraries());
             jarMavens.addAll(result.getJarMavens());
+        } else {
+            log.warning("Loader " + file.getName() + " was skipped due to missing metadata. " +
+                    "Is it really a loader JAR?");
         }
     }
 
     public void downloadLibraries(File librariesDir) throws IOException, InterruptedException {
         logSection("Downloading libraries...");
 
-        // TODO: Download libraries for different environments -- As of writing, this is not an issue
-        Environment env = Environment.getInstance();
-
         for (Library library : Iterables.concat(loaderLibraries, installerLibraries)) {
-            Library.Artifact artifact = library.getArtifact(env);
-            File outputPath = new File(librariesDir, artifact.getPath());
+            library.ensureDownloadsExist();
 
-            if (!outputPath.exists()) {
-                Files.createParentDirs(outputPath);
-                boolean found = false;
+            for (Library.Artifact artifact : library.getDownloads().getAllArtifacts()) {
+                File outputPath = new File(librariesDir, artifact.getPath());
 
-                // Try just the URL, it might be a full URL to the file
-                if (!artifact.getUrl().isEmpty()) {
-                    found = tryDownloadLibrary(library, artifact, artifact.getUrl(), outputPath);
-                }
+                if (!outputPath.exists()) {
+                    Files.createParentDirs(outputPath);
+                    boolean found = false;
 
-                // Look inside the loader JARs
-                if (!found) {
-                    for (URL base : jarMavens) {
-                        found = tryFetchLibrary(library, new URL(base, artifact.getPath()), outputPath);
-                        if (found) break;
+                    // Try just the URL, it might be a full URL to the file
+                    if (!artifact.getUrl().isEmpty()) {
+                        found = tryDownloadLibrary(library, artifact, artifact.getUrl(), outputPath);
                     }
-                }
 
-                // Assume artifact URL is a maven repository URL and try that
-                if (!found) {
-                    URL url = LauncherUtils.concat(url(artifact.getUrl()), artifact.getPath());
-                    found = tryDownloadLibrary(library, artifact, url.toString(), outputPath);
-                }
-
-                // Try each repository if not found yet
-                if (!found) {
-                    for (String baseUrl : mavenRepos) {
-                        found = tryDownloadLibrary(library, artifact, baseUrl + artifact.getPath(), outputPath);
-                        if (found) break;
+                    // Look inside the loader JARs
+                    if (!found) {
+                        for (URL base : jarMavens) {
+                            found = tryFetchLibrary(library, new URL(base, artifact.getPath()), outputPath);
+                            if (found) break;
+                        }
                     }
-                }
 
-                if (!found) {
-                    log.warning("!! Failed to download the library " + library.getName() + " -- this means your copy of the libraries will lack this file");
+                    // Assume artifact URL is a maven repository URL and try that
+                    if (!found) {
+                        URL url = LauncherUtils.concat(url(artifact.getUrl()), artifact.getPath());
+                        found = tryDownloadLibrary(library, artifact, url.toString(), outputPath);
+                    }
+
+                    // Try each repository if not found yet
+                    if (!found) {
+                        for (String baseUrl : mavenRepos) {
+                            found = tryDownloadLibrary(library, artifact, baseUrl + artifact.getPath(),
+                                    outputPath);
+                            if (found) break;
+                        }
+                    }
+
+                    if (!found) {
+                        log.warning("!! Failed to download the library " + library.getName() +
+                                " -- this means your copy of the libraries will lack this file");
+                    }
                 }
             }
         }
diff --git a/launcher/src/main/java/com/skcraft/launcher/model/minecraft/Library.java b/launcher/src/main/java/com/skcraft/launcher/model/minecraft/Library.java
index a5e0047..5ebc43c 100644
--- a/launcher/src/main/java/com/skcraft/launcher/model/minecraft/Library.java
+++ b/launcher/src/main/java/com/skcraft/launcher/model/minecraft/Library.java
@@ -9,6 +9,7 @@ package com.skcraft.launcher.model.minecraft;
 import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
 import com.google.common.base.Joiner;
 import com.google.common.base.Splitter;
+import com.google.common.collect.Lists;
 import com.skcraft.launcher.util.Environment;
 import lombok.Data;
 
@@ -71,6 +72,12 @@ public class Library {
         }
     }
 
+    public void ensureDownloadsExist() {
+        if (getDownloads() == null) {
+            setServerreq(true); // BACKWARDS COMPATIBILITY
+        }
+    }
+
     /**
      * BACKWARDS COMPATIBILITY:
      * Some library definitions only come with a "name" key and don't trigger any other compatibility measures.
@@ -81,9 +88,7 @@ public class Library {
      * the library name and using that.
      */
     public Artifact getArtifact(Environment environment) {
-        if (getDownloads() == null) {
-            setServerreq(true); // BACKWARDS COMPATIBILITY
-        }
+        ensureDownloadsExist();
 
         String nativeString = getNativeString(environment);
 
@@ -147,6 +152,18 @@ public class Library {
     public static class Downloads {
         private Artifact artifact;
         private Map<String, Artifact> classifiers;
+
+        public List<Artifact> getAllArtifacts() {
+            List<Artifact> artifacts = Lists.newArrayList();
+
+            if (artifact != null)
+                artifacts.add(artifact);
+
+            if (classifiers != null)
+                artifacts.addAll(classifiers.values());
+
+            return artifacts;
+        }
     }
 
     /**