diff -ur package.orig/binding.gyp package/binding.gyp
--- package.orig/binding.gyp	1985-10-26 17:15:00.000000000 +0900
+++ package/binding.gyp	2024-05-29 05:04:21.119164000 +0900
@@ -3,7 +3,8 @@
     {
       'target_name': 'kerberos',
       'type': 'loadable_module',
-      'include_dirs': [  "<!(node -p \"require('node-addon-api').include_dir\")" ],
+      'include_dirs': [  "<!(node -p \"require('node-addon-api').include_dir\")"
+      ],
       'sources': [
         'src/kerberos.cc'
       ],
@@ -34,14 +35,16 @@
               'GCC_SYMBOLS_PRIVATE_EXTERN': 'YES', # -fvisibility=hidden
             }
         }],
-        ['OS=="mac" or OS=="linux"', {
+        ['OS=="mac" or OS=="linux" or OS=="freebsd"', {
+          'cflags+': ['-DNODE_API_EXPERIMENTAL',
+            '-DNODE_API_EXPERIMENTAL_NOGC_ENV_OPT_OUT'],
           'sources': [
             'src/unix/base64.cc',
             'src/unix/kerberos_gss.cc',
             'src/unix/kerberos_unix.cc'
           ]
         }],
-        ['(OS=="mac" or OS=="linux") and (kerberos_use_rtld!="true")', {
+        ['(OS=="mac" or OS=="linux" or OS=="freebsd") and (kerberos_use_rtld!="true")', {
           'link_settings': {
             'libraries': [
               '-lkrb5',
@@ -58,7 +61,7 @@
             }]
           ]
         }],
-        ['(OS=="mac" or OS=="linux") and (kerberos_use_rtld=="true")', {
+        ['(OS=="mac" or OS=="linux" or OS=="freebsd") and (kerberos_use_rtld=="true")', {
           'defines': ['KERBEROS_USE_RTLD=1'],
           'link_settings': {
             'libraries': [
Only in package: build
diff -ur package.orig/src/kerberos_common.h package/src/kerberos_common.h
--- package.orig/src/kerberos_common.h	1985-10-26 17:15:00.000000000 +0900
+++ package/src/kerberos_common.h	2024-05-28 15:57:59.552688000 +0900
@@ -1,7 +1,7 @@
 #ifndef KERBEROS_COMMON_H
 #define KERBEROS_COMMON_H
 
-#if defined(__linux__) || defined(__APPLE__)
+#if defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__)
 #include "unix/kerberos_gss.h"
 
 namespace node_kerberos {