diff --git a/src/buildstream/sandbox/_sandboxbuildboxrun.py b/src/buildstream/sandbox/_sandboxbuildboxrun.py
index d6eb2dc2d..25d200262 100644
--- a/src/buildstream/sandbox/_sandboxbuildboxrun.py
+++ b/src/buildstream/sandbox/_sandboxbuildboxrun.py
@@ -238,6 +238,3 @@ def resume_proc():
 
             if returncode != 0:
                 raise SandboxError("buildbox-run failed with returncode {}".format(returncode))
-
-    def _supported_platform_properties(self):
-        return {"OSFamily", "ISA", "unixUID", "unixGID", "network"}
diff --git a/src/buildstream/sandbox/_sandboxreapi.py b/src/buildstream/sandbox/_sandboxreapi.py
index 34b6c8892..17997b355 100644
--- a/src/buildstream/sandbox/_sandboxreapi.py
+++ b/src/buildstream/sandbox/_sandboxreapi.py
@@ -131,10 +131,6 @@ def _create_platform(self, flags):
         if flags & _SandboxFlags.NETWORK_ENABLED:
             platform_dict["network"] = "on"
 
-        # Remove unsupported platform properties from the dict
-        supported_properties = self._supported_platform_properties()
-        platform_dict = {key: value for (key, value) in platform_dict.items() if key in supported_properties}
-
         # Create Platform message with properties sorted by name in code point order
         platform = remote_execution_pb2.Platform()
         for key, value in sorted(platform_dict.items()):
@@ -203,9 +199,6 @@ def _create_batch(self, main_group, flags, *, collect=None):
     def _execute_action(self, action, flags):
         raise ImplError("Sandbox of type '{}' does not implement _execute_action()".format(type(self).__name__))
 
-    def _supported_platform_properties(self):
-        return {"OSFamily", "ISA"}
-
 
 # _SandboxREAPIBatch()
 #