diff --git a/app/vpn/CMakeLists_vpn.cmake b/app/vpn/CMakeLists_vpn.cmake
index 4c4d15b..ce55f9d 100644
--- a/app/vpn/CMakeLists_vpn.cmake
+++ b/app/vpn/CMakeLists_vpn.cmake
@@ -13,7 +13,7 @@
 #   macOS/Linux  : deps/boringtun/libboringtun.a
 #   Windows      : deps/boringtun/boringtun.lib
 
-# ─── boringtun static library ─────────────────────────────────────────────────
+# boringtun static library
 
 if(WIN32)
     set(BORINGTUN_LIB "${CMAKE_SOURCE_DIR}/deps/boringtun/boringtun.lib")
@@ -27,11 +27,16 @@ if(NOT EXISTS "${BORINGTUN_LIB}")
             "boringtun static library not found at ${BORINGTUN_LIB}\n"
             "Run:  pwsh scripts/build-boringtun-win.ps1\n"
             "then re-run CMake.")
-    else()
+    elseif(APPLE)
         message(FATAL_ERROR
             "boringtun static library not found at ${BORINGTUN_LIB}\n"
             "Run:  bash scripts/build-boringtun.sh --universal\n"
             "then re-run CMake.")
+    else()
+        message(FATAL_ERROR
+            "boringtun static library not found at ${BORINGTUN_LIB}\n"
+            "Run:  bash scripts/build-boringtun.sh\n"
+            "then re-run CMake.")
     endif()
 endif()
 
@@ -40,12 +45,12 @@ set_target_properties(boringtun PROPERTIES
     IMPORTED_LOCATION "${BORINGTUN_LIB}"
 )
 
-# ─── VPN source files ──────────────────────────────────────────────────────────
+# VPN source files
 
 set(VPN_SOURCES
     app/vpn/wireguardconfig.cpp
     app/vpn/relayclient.cpp
-    app/vpn/dragonrelaybackend.cpp   # QObject bridge: RelayClient + TunnelManager → QML
+    app/vpn/dragonrelaybackend.cpp
 )
 
 if(APPLE)
@@ -53,10 +58,10 @@ if(APPLE)
 elseif(WIN32)
     list(APPEND VPN_SOURCES app/vpn/tunnelmanager_win.cpp)
 elseif(UNIX)
-    list(APPEND VPN_SOURCES app/vpn/tunnelmanager_linux.cpp) # future
+    list(APPEND VPN_SOURCES app/vpn/tunnelmanager_linux.cpp)
 endif()
 
-# ─── Integration into moonlight-qt target ─────────────────────────────────────
+# Integration into moonlight-qt target.
 # Replace moonlight-qt below with whatever your top-level CMakeLists calls the app target.
 
 target_sources(moonlight-qt PRIVATE ${VPN_SOURCES})
@@ -68,24 +73,17 @@ target_include_directories(moonlight-qt PRIVATE
 target_link_libraries(moonlight-qt PRIVATE boringtun)
 
 if(APPLE)
-    # Frameworks required by boringtun + tunnel implementation on macOS
     target_link_libraries(moonlight-qt PRIVATE
         "-framework Security"
         "-framework Network"
         "-framework SystemConfiguration"
     )
-    # Objective-C++ ARC needed for tunnelmanager_mac.mm
     set_source_files_properties(
         app/vpn/tunnelmanager_mac.mm
         PROPERTIES COMPILE_FLAGS "-fobjc-arc"
     )
 
 elseif(WIN32)
-    # Windows system libraries required by Wintun + IP Helper API + Winsock
-    #   iphlpapi   — CreateUnicastIpAddressEntry, CreateIpForwardEntry2
-    #   ws2_32     — socket, sendto, recvfrom, WSAEventSelect, …
-    #   ntdll      — required by boringtun's ring0 primitives
-    #   ole32      — CoCreateGuid (adapter GUID)
     target_link_libraries(moonlight-qt PRIVATE
         iphlpapi
         ws2_32
@@ -93,15 +91,11 @@ elseif(WIN32)
         ole32
     )
 
-    # Embed the UAC manifest so Windows prompts for elevation at launch.
-    # Visual Studio picks this up automatically; for Ninja/MSBuild add
-    # a custom command that runs mt.exe post-link.
     if(MSVC)
         set_target_properties(moonlight-qt PROPERTIES
             LINK_FLAGS "/MANIFEST:EMBED /MANIFESTINPUT:${CMAKE_SOURCE_DIR}/app/DragonMoonlight.manifest"
         )
     else()
-        # MinGW: link the manifest as a resource
         configure_file(
             "${CMAKE_SOURCE_DIR}/app/DragonMoonlight.manifest"
             "${CMAKE_CURRENT_BINARY_DIR}/DragonMoonlight.manifest"
@@ -111,16 +105,16 @@ elseif(WIN32)
             "${CMAKE_CURRENT_BINARY_DIR}/DragonMoonlight.manifest"
         )
     endif()
+
+elseif(UNIX)
+    target_link_libraries(moonlight-qt PRIVATE pthread)
 endif()
 
-# ─── Qt resources: logo images ────────────────────────────────────────────────
-# Assets referenced in QML as qrc:/app/assets/wilddragon-{icon,logo}.jpg
-# Both qt5_add_resources and qt_add_resources accept a .qrc file path directly.
+# Qt resources: logo images
 
 set(DRAGON_QRC_FILE "${CMAKE_SOURCE_DIR}/app/assets/dragonmoonlight.qrc")
 
 if(NOT QT_VERSION_MAJOR)
-    # Fallback if QT_VERSION_MAJOR isn't set yet — derive from Qt5/Qt6 find_package result
     if(Qt6_FOUND)
         set(QT_VERSION_MAJOR 6)
     else()