--- core/CMakeLists.txt.orig	2026-05-02 21:54:00 UTC
+++ core/CMakeLists.txt
@@ -40,6 +40,10 @@ if (GOOS STREQUAL "")
         set(GOOS "windows")
     elseif(LINUX)
         set(GOOS "linux")
+    elseif(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+        set(GOOS "freebsd")
+    elseif(APPLE)
+        set(GOOS "darwin")
     else()
         set(GOOS "")
     endif()
@@ -182,9 +186,15 @@ message(STATUS "DESTINATION IS ${DESTDIR} FOR MACHINE 
 # ----------------------------
 # Tags
 # ----------------------------
-set(TAGS "with_clash_api,with_gvisor,with_quic,with_wireguard,with_utls,with_dhcp,with_tailscale,with_shadowtls,with_grpc,with_acme,with_internal_resolvectl")
+set(TAGS "with_clash_api,with_quic,with_utls,with_grpc,with_acme")
 
-if(GOARCH STREQUAL "arm64" OR GOARCH STREQUAL "amd64")
+if(NOT CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+    set(TAGS "${TAGS},with_gvisor,with_wireguard,with_dhcp,with_tailscale,with_shadowtls,with_internal_resolvectl")
+else()
+    message(STATUS "FreeBSD: disabling TUN-based and gVisor features")
+endif()
+
+if((GOARCH STREQUAL "arm64" OR GOARCH STREQUAL "amd64") AND NOT CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
     set(TAGS "${TAGS},with_naive,with_naive_outbound,with_purego")
 endif()