diff --git a/libc/src/__support/RPC/rpc.h b/libc/src/__support/RPC/rpc.h
--- a/libc/src/__support/RPC/rpc.h
+++ b/libc/src/__support/RPC/rpc.h
@@ -74,7 +74,7 @@
 ///   - The client will always start with a 'send' operation.
 ///   - The server will always start with a 'recv' operation.
 ///   - Every 'send' or 'recv' call is mirrored by the other process.
-template <bool Invert, uint32_t lane_size> struct Process {
+template <bool Invert, template Packet> struct Process {
   LIBC_INLINE Process() = default;
   LIBC_INLINE Process(const Process &) = delete;
   LIBC_INLINE Process &operator=(const Process &) = delete;
@@ -85,7 +85,7 @@
   uint64_t port_count;
   cpp::Atomic<uint32_t> *inbox;
   cpp::Atomic<uint32_t> *outbox;
-  Packet<lane_size> *packet;
+  Packet *packet;
 
   cpp::Atomic<uint32_t> lock[DEFAULT_PORT_COUNT] = {0};
 
@@ -96,8 +96,8 @@
         advance(buffer, inbox_offset(port_count)));
     this->outbox = reinterpret_cast<cpp::Atomic<uint32_t> *>(
         advance(buffer, outbox_offset(port_count)));
-    this->packet = reinterpret_cast<Packet<lane_size> *>(
-        advance(buffer, buffer_offset(port_count)));
+    this->packet =
+        reinterpret_cast<Packet *>(advance(buffer, buffer_offset(port_count)));
   }
 
   /// Returns the beginning of the unified buffer. Intended for initializing the
@@ -221,30 +221,6 @@
     gpu::sync_lane(lane_mask);
   }
 
-  /// Invokes a function accross every active buffer across the total lane size.
-  LIBC_INLINE void invoke_rpc(cpp::function<void(Buffer *)> fn,
-                              Packet<lane_size> &packet) {
-    if constexpr (is_process_gpu()) {
-      fn(&packet.payload.slot[gpu::get_lane_id()]);
-    } else {
-      for (uint32_t i = 0; i < lane_size; i += gpu::get_lane_size())
-        if (packet.header.mask & 1ul << i)
-          fn(&packet.payload.slot[i]);
-    }
-  }
-
-  /// Alternate version that also provides the index of the current lane.
-  LIBC_INLINE void invoke_rpc(cpp::function<void(Buffer *, uint32_t)> fn,
-                              Packet<lane_size> &packet) {
-    if constexpr (is_process_gpu()) {
-      fn(&packet.payload.slot[gpu::get_lane_id()], gpu::get_lane_id());
-    } else {
-      for (uint32_t i = 0; i < lane_size; i += gpu::get_lane_size())
-        if (packet.header.mask & 1ul << i)
-          fn(&packet.payload.slot[i], i);
-    }
-  }
-
   /// Number of bytes to allocate for an inbox or outbox.
   LIBC_INLINE static constexpr uint64_t mailbox_bytes(uint64_t port_count) {
     return port_count * sizeof(cpp::Atomic<uint32_t>);
@@ -252,7 +228,7 @@
 
   /// Number of bytes to allocate for the buffer containing the packets.
   LIBC_INLINE static constexpr uint64_t buffer_bytes(uint64_t port_count) {
-    return port_count * sizeof(Packet<lane_size>);
+    return port_count * sizeof(Packet);
   }
 
   /// Offset of the inbox in memory. This is the same as the outbox if inverted.
@@ -267,10 +243,40 @@
 
   /// Offset of the buffer containing the packets after the inbox and outbox.
   LIBC_INLINE static constexpr uint64_t buffer_offset(uint64_t port_count) {
-    return align_up(2 * mailbox_bytes(port_count), alignof(Packet<lane_size>));
+    return align_up(2 * mailbox_bytes(port_count), alignof(Packet));
   }
 };
 
+namespace {
+
+/// Invokes a function accross every active buffer across the total lane size.
+template <uint32_t lane_size>
+LIBC_INLINE void invoke_rpc(cpp::function<void(Buffer *)> fn,
+                            Packet<lane_size> &packet) {
+  if constexpr (is_process_gpu()) {
+    fn(&packet.payload.slot[gpu::get_lane_id()]);
+  } else {
+    for (uint32_t i = 0; i < lane_size; i += gpu::get_lane_size())
+      if (packet.header.mask & 1ul << i)
+        fn(&packet.payload.slot[i]);
+  }
+}
+
+/// Alternate version that also provides the index of the current lane.
+template <uint32_t lane_size>
+LIBC_INLINE void invoke_rpc(cpp::function<void(Buffer *, uint32_t)> fn,
+                            Packet<lane_size> &packet) {
+  if constexpr (is_process_gpu()) {
+    fn(&packet.payload.slot[gpu::get_lane_id()], gpu::get_lane_id());
+  } else {
+    for (uint32_t i = 0; i < lane_size; i += gpu::get_lane_size())
+      if (packet.header.mask & 1ul << i)
+        fn(&packet.payload.slot[i], i);
+  }
+}
+
+} // namespace
+
 /// The port provides the interface to communicate between the multiple
 /// processes. A port is conceptually an index into the memory provided by the
 /// underlying process that is guarded by a lock bit.
@@ -339,7 +345,7 @@
   }
 
 private:
-  Process<false, gpu::LANE_SIZE> process;
+  Process<false, Packet<gpu::LANE_SIZE>> process;
 };
 
 /// The RPC server used to respond to the client.
@@ -362,11 +368,11 @@
   }
 
   LIBC_INLINE static uint64_t allocation_size(uint64_t port_count) {
-    return Process<true, lane_size>::allocation_size(port_count);
+    return Process<true, Packet<lane_size>>::allocation_size(port_count);
   }
 
 private:
-  Process<true, lane_size> process;
+  Process<true, Packet<lane_size>> process;
 };
 
 /// Applies \p fill to the shared buffer and initiates a send operation.