diff --git a/src/main.rs b/src/main.rs
index efcbbca..77489eb 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -136,16 +136,45 @@ fn handle_package_command(
 
 fn handle_packages_command(
     managers: &[Box<dyn PackageManager>], 
-    _source_filter: Option<String>
+    source_filter: Option<String>  // Removed the underscore!
 ) -> Result<(), Box<dyn std::error::Error>> {
-    if let Some(dnf) = managers.iter().find(|m| m.name() == "dnf") {
-        let packages = dnf.get_installed_packages()?;
-        println!("Installed packages ({} total):", packages.len());
-        for package in packages.iter() {
-            println!("  {} {} ({})", 
-                    package.name, 
-                    package.version,
-                    package.source.name());
+    if let Some(source_name) = source_filter {
+        // Filter by specific source
+        let source_type = match source_name.to_lowercase().as_str() {
+            "dnf" => PackageSource::Dnf,
+            "flatpak" => PackageSource::Flatpak,
+            "apt" => PackageSource::Apt,
+            "snap" => PackageSource::Snap,
+            _ => {
+                println!("Unknown source: {}. Available: dnf, flatpak, apt, snap", source_name);
+                return Ok(());
+            }
+        };
+        
+        // Find manager for this source
+        if let Some(manager) = managers.iter().find(|m| m.source_type() == source_type) {
+            let packages = manager.get_installed_packages()?;
+            println!("{} packages ({} total):", source_name, packages.len());
+            for package in packages.iter() {
+                println!("  {} {}", package.name, package.version);
+            }
+        } else {
+            println!("No {} package manager found or available", source_name);
+        }
+    } else {
+        // Show all packages from all managers
+        for manager in managers {
+            match manager.get_installed_packages() {
+                Ok(packages) => {
+                    println!("\n{} packages ({} total):", manager.name(), packages.len());
+                    for package in packages.iter() {
+                        println!("  {} {}", package.name, package.version);
+                    }
+                }
+                Err(e) => {
+                    println!("Error getting packages from {}: {}", manager.name(), e);
+                }
+            }
         }
     }
     Ok(())