diff --git a/pkgs/development/interpreters/python-cosmopolitan/default.nix b/pkgs/development/interpreters/python-cosmopolitan/default.nix
index 14459a24aac..a2a512b9cdf 100644
--- a/pkgs/development/interpreters/python-cosmopolitan/default.nix
+++ b/pkgs/development/interpreters/python-cosmopolitan/default.nix
@@ -6,10 +6,6 @@ stdenv.mkDerivation rec {
 
   src = cosmopolitan.dist;
 
-  patches = [
-    ./ioctl.patch        # required /dev/tty
-  ];
-
   nativeBuildInputs = [ bintools-unwrapped unzip ];
 
   # slashes are significant because upstream uses o/$(MODE)/foo.o
diff --git a/pkgs/development/interpreters/python-cosmopolitan/ioctl.patch b/pkgs/development/interpreters/python-cosmopolitan/ioctl.patch
deleted file mode 100644
index e6e7eb4fc7b..00000000000
--- a/pkgs/development/interpreters/python-cosmopolitan/ioctl.patch
+++ /dev/null
@@ -1,12 +0,0 @@
-diff --git a/third_party/python/python.mk b/third_party/python/python.mk
-index f18c15060..b17455bca 100644
---- a/third_party/python/python.mk
-+++ b/third_party/python/python.mk
-@@ -1818,7 +1818,6 @@ THIRD_PARTY_PYTHON_PYTEST_PYMAINS =						\
- 	third_party/python/Lib/test/test_int_literal.py				\
- 	third_party/python/Lib/test/test_bisect.py				\
- 	third_party/python/Lib/test/test_pyexpat.py				\
--	third_party/python/Lib/test/test_ioctl.py				\
- 	third_party/python/Lib/test/test_getopt.py				\
- 	third_party/python/Lib/test/test_sort.py				\
- 	third_party/python/Lib/test/test_slice.py				\