diff --git a/backends/cuda/tests/TARGETS b/backends/cuda/tests/BUCK
similarity index 86%
rename from backends/cuda/tests/TARGETS
rename to backends/cuda/tests/BUCK
index 974086cd4c5..79d5841fb72 100644
--- a/backends/cuda/tests/TARGETS
+++ b/backends/cuda/tests/BUCK
@@ -1,10 +1,11 @@
+load("@fbcode_macros//build_defs:build_file_migration.bzl", "fbcode_target", "non_fbcode_target")
 load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
 load("@fbcode_macros//build_defs:python_unittest.bzl", "python_unittest")
 load("@fbcode_macros//build_defs:python_unittest_remote_gpu.bzl", "python_unittest_remote_gpu")
 
 oncall("executorch")
 
-python_unittest_remote_gpu(
+fbcode_target(_kind = python_unittest_remote_gpu,
     name = "test_cuda_export",
     srcs = [
         "test_cuda_export.py",
@@ -24,7 +25,7 @@ python_unittest_remote_gpu(
     keep_gpu_sections = True,
 )
 
-python_unittest(
+fbcode_target(_kind = python_unittest,
     name = "test_cuda_partitioner",
     srcs = [
         "test_cuda_partitioner.py",
diff --git a/backends/example/TARGETS b/backends/example/BUCK
similarity index 85%
rename from backends/example/TARGETS
rename to backends/example/BUCK
index 48fb971428b..d1f474f54e8 100644
--- a/backends/example/TARGETS
+++ b/backends/example/BUCK
@@ -1,9 +1,10 @@
+load("@fbcode_macros//build_defs:build_file_migration.bzl", "fbcode_target", "non_fbcode_target")
 load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
 load("@fbcode_macros//build_defs:python_unittest.bzl", "python_unittest")
 
 oncall("executorch")
 
-runtime.python_library(
+fbcode_target(_kind = runtime.python_library,
     name = "example_quantizer",
     srcs = [
         "example_quantizer.py",
@@ -15,7 +16,7 @@ runtime.python_library(
     ],
 )
 
-runtime.python_library(
+fbcode_target(_kind = runtime.python_library,
     name = "example_backend",
     srcs = [
         "example_backend.py",
@@ -27,7 +28,7 @@ runtime.python_library(
     ],
 )
 
-runtime.python_library(
+fbcode_target(_kind = runtime.python_library,
     name = "example_partitioner",
     srcs = [
         "example_partitioner.py",
@@ -43,7 +44,7 @@ runtime.python_library(
     ],
 )
 
-python_unittest(
+fbcode_target(_kind = python_unittest,
     name = "test_example_delegate",
     srcs = [
         "test_example_delegate.py",
diff --git a/backends/mediatek/quantizer/TARGETS b/backends/mediatek/quantizer/BUCK
similarity index 70%
rename from backends/mediatek/quantizer/TARGETS
rename to backends/mediatek/quantizer/BUCK
index 09be73cd172..1638bbeecff 100644
--- a/backends/mediatek/quantizer/TARGETS
+++ b/backends/mediatek/quantizer/BUCK
@@ -1,6 +1,7 @@
+load("@fbcode_macros//build_defs:build_file_migration.bzl", "fbcode_target", "non_fbcode_target")
 load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
 
-runtime.python_library(
+fbcode_target(_kind = runtime.python_library,
     name = "quantizer",
     srcs = [
         "__init__.py",
diff --git a/backends/mediatek/runtime/BUCK b/backends/mediatek/runtime/BUCK
index d395eb07786..9377c1f13d6 100644
--- a/backends/mediatek/runtime/BUCK
+++ b/backends/mediatek/runtime/BUCK
@@ -1,3 +1,5 @@
+load("@fbcode_macros//build_defs:build_file_migration.bzl", "fbcode_target", "non_fbcode_target")
+oncall("executorch")
 # Any targets that should be shared between fbcode and xplat must be defined in
 # targets.bzl. This file can contain xplat-only targets.
 
@@ -7,9 +9,8 @@ load(
 )
 load("@fbsource//xplat/executorch/build:runtime_wrapper.bzl", "runtime")
 
-oncall("executorch")
 
-runtime.cxx_library(
+non_fbcode_target(_kind = runtime.cxx_library,
     name = "neuron_backend",
     srcs = [
         "NeuronBackend.cpp",
@@ -31,3 +32,6 @@ runtime.cxx_library(
     platforms = [ANDROID],
     visibility = ["PUBLIC"],
 )
+
+# !!!! fbcode/executorch/backends/mediatek/runtime/TARGETS was merged into this file, see https://fburl.com/workplace/xl8l9yuo for more info !!!!
+
diff --git a/backends/mediatek/runtime/TARGETS b/backends/mediatek/runtime/TARGETS
deleted file mode 100644
index e69de29bb2d..00000000000