hopefully this works

src/os/serenity.cpp

@@ -145,10 +145,6 @@ namespace os {
 
     return DiskSpace { .used_bytes = used_bytes, .total_bytes = total_bytes };
   }
-
-  fn GetPackageCount() -> Result<u64, DracError> {
-    return Err(DracError(DracErrorCode::NotSupported, "Package count is not supported on SerenityOS"));
-  }
 } // namespace os
 
 #endif // __serenity__

src/os/serenity/package.cpp

@@ -0,0 +1,31 @@
+#ifdef __serenity__
+
+// clang-format off
+#include "src/core/package.hpp"
+
+#include "src/util/defs.hpp"
+// clang-format on
+
+namespace {
+  fn CountUniquePackages(const String& dbPath) -> Result<u64, DracError> {
+    std::ifstream dbFile(dbPath);
+
+    if (!dbFile.is_open())
+      return Err(DracError(DracErrorCode::NotFound, std::format("Failed to open file: {}", dbPath.string())));
+
+    std::unordered_set<String> uniquePackages;
+    String                     line;
+
+    while (std::getline(dbFile, line))
+      if (line.starts_with("manual ") || line.starts_with("auto "))
+        uniquePackages.insert(line);
+
+    return uniquePackages.size();
+  }
+} // namespace
+
+namespace package {
+  fn GetSerenityCount() -> Result<u64, DracError> { return CountUniquePackages("/usr/ports/installed.db"); }
+} // namespace package
+
+#endif // __serenity__