diff --git a/build/fbcode_builder/getdeps/builder.py b/build/fbcode_builder/getdeps/builder.py
index f3246fe85..43542e04c 100644
--- a/build/fbcode_builder/getdeps/builder.py
+++ b/build/fbcode_builder/getdeps/builder.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import glob
 import json
 import os
diff --git a/build/fbcode_builder/getdeps/buildopts.py b/build/fbcode_builder/getdeps/buildopts.py
index dcf551cb8..bf70265b2 100644
--- a/build/fbcode_builder/getdeps/buildopts.py
+++ b/build/fbcode_builder/getdeps/buildopts.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import errno
 import glob
 import ntpath
diff --git a/build/fbcode_builder/getdeps/cache.py b/build/fbcode_builder/getdeps/cache.py
index 4d2786e7e..ed0d45bfd 100644
--- a/build/fbcode_builder/getdeps/cache.py
+++ b/build/fbcode_builder/getdeps/cache.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 class ArtifactCache(object):
     """The ArtifactCache is a small abstraction that allows caching
diff --git a/build/fbcode_builder/getdeps/cargo.py b/build/fbcode_builder/getdeps/cargo.py
index 15996ad51..779fa8333 100644
--- a/build/fbcode_builder/getdeps/cargo.py
+++ b/build/fbcode_builder/getdeps/cargo.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import os
 import re
 import shutil
diff --git a/build/fbcode_builder/getdeps/copytree.py b/build/fbcode_builder/getdeps/copytree.py
index a3522b313..2297bd3aa 100644
--- a/build/fbcode_builder/getdeps/copytree.py
+++ b/build/fbcode_builder/getdeps/copytree.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import os
 import shutil
 import subprocess
diff --git a/build/fbcode_builder/getdeps/dyndeps.py b/build/fbcode_builder/getdeps/dyndeps.py
index ba0895132..0dd9a4557 100644
--- a/build/fbcode_builder/getdeps/dyndeps.py
+++ b/build/fbcode_builder/getdeps/dyndeps.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import errno
 import glob
 import os
diff --git a/build/fbcode_builder/getdeps/envfuncs.py b/build/fbcode_builder/getdeps/envfuncs.py
index 60de6b231..f32418c93 100644
--- a/build/fbcode_builder/getdeps/envfuncs.py
+++ b/build/fbcode_builder/getdeps/envfuncs.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import os
 import shlex
 import sys
diff --git a/build/fbcode_builder/getdeps/errors.py b/build/fbcode_builder/getdeps/errors.py
index 92240c953..1d01ad0ec 100644
--- a/build/fbcode_builder/getdeps/errors.py
+++ b/build/fbcode_builder/getdeps/errors.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 class TransientFailure(Exception):
     """Raising this error causes getdeps to return with an error code
diff --git a/build/fbcode_builder/getdeps/expr.py b/build/fbcode_builder/getdeps/expr.py
index df8c30227..0f51521d6 100644
--- a/build/fbcode_builder/getdeps/expr.py
+++ b/build/fbcode_builder/getdeps/expr.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import re
 import shlex
 
diff --git a/build/fbcode_builder/getdeps/fetcher.py b/build/fbcode_builder/getdeps/fetcher.py
index ae96ac133..b1c113f46 100644
--- a/build/fbcode_builder/getdeps/fetcher.py
+++ b/build/fbcode_builder/getdeps/fetcher.py
@@ -4,6 +4,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import errno
 import hashlib
 import os
diff --git a/build/fbcode_builder/getdeps/load.py b/build/fbcode_builder/getdeps/load.py
index 478e1b4cd..c737142d0 100644
--- a/build/fbcode_builder/getdeps/load.py
+++ b/build/fbcode_builder/getdeps/load.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import base64
 import copy
 import hashlib
diff --git a/build/fbcode_builder/getdeps/manifest.py b/build/fbcode_builder/getdeps/manifest.py
index 15f69af7d..eab64c95b 100644
--- a/build/fbcode_builder/getdeps/manifest.py
+++ b/build/fbcode_builder/getdeps/manifest.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import configparser
 import io
 import os
diff --git a/build/fbcode_builder/getdeps/platform.py b/build/fbcode_builder/getdeps/platform.py
index 7f0cb502b..4def6f0d7 100644
--- a/build/fbcode_builder/getdeps/platform.py
+++ b/build/fbcode_builder/getdeps/platform.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import os
 
 import platform
diff --git a/build/fbcode_builder/getdeps/py_wheel_builder.py b/build/fbcode_builder/getdeps/py_wheel_builder.py
index 53e807927..92bf7a382 100644
--- a/build/fbcode_builder/getdeps/py_wheel_builder.py
+++ b/build/fbcode_builder/getdeps/py_wheel_builder.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import codecs
 import collections
 import email
diff --git a/build/fbcode_builder/getdeps/runcmd.py b/build/fbcode_builder/getdeps/runcmd.py
index dc35b6f02..e0b9d2b22 100644
--- a/build/fbcode_builder/getdeps/runcmd.py
+++ b/build/fbcode_builder/getdeps/runcmd.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 import os
 import select
 import subprocess
diff --git a/build/fbcode_builder/getdeps/subcmd.py b/build/fbcode_builder/getdeps/subcmd.py
index 3c338642d..acbeb93f1 100644
--- a/build/fbcode_builder/getdeps/subcmd.py
+++ b/build/fbcode_builder/getdeps/subcmd.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 class SubCmd(object):
     NAME = None
diff --git a/build/fbcode_builder/getdeps/test/expr_test.py b/build/fbcode_builder/getdeps/test/expr_test.py
index f12f68985..4f4b957ce 100644
--- a/build/fbcode_builder/getdeps/test/expr_test.py
+++ b/build/fbcode_builder/getdeps/test/expr_test.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 import unittest
 
diff --git a/build/fbcode_builder/getdeps/test/manifest_test.py b/build/fbcode_builder/getdeps/test/manifest_test.py
index e48b05f32..05b2c58b1 100644
--- a/build/fbcode_builder/getdeps/test/manifest_test.py
+++ b/build/fbcode_builder/getdeps/test/manifest_test.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 import sys
 import unittest
diff --git a/build/fbcode_builder/getdeps/test/platform_test.py b/build/fbcode_builder/getdeps/test/platform_test.py
index ce0de7a67..1fcab7a58 100644
--- a/build/fbcode_builder/getdeps/test/platform_test.py
+++ b/build/fbcode_builder/getdeps/test/platform_test.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 import unittest
 
diff --git a/build/fbcode_builder/getdeps/test/scratch_test.py b/build/fbcode_builder/getdeps/test/scratch_test.py
index b57d8b583..4075e0a3d 100644
--- a/build/fbcode_builder/getdeps/test/scratch_test.py
+++ b/build/fbcode_builder/getdeps/test/scratch_test.py
@@ -3,6 +3,8 @@
 # This source code is licensed under the MIT license found in the
 # LICENSE file in the root directory of this source tree.
 
+# pyre-unsafe
+
 
 import unittest