diff --git a/pkgs/development/python-modules/xformers/default.nix b/pkgs/development/python-modules/xformers/default.nix
index 87f624dc0806..d46224e0502b 100644
--- a/pkgs/development/python-modules/xformers/default.nix
+++ b/pkgs/development/python-modules/xformers/default.nix
@@ -3,6 +3,7 @@
   stdenv,
   buildPythonPackage,
   fetchFromGitHub,
+  fetchpatch,
 
   # build-system
   torch,
@@ -51,6 +52,16 @@ buildPythonPackage.override { stdenv = effectiveStdenv; } (finalAttrs: {
     hash = "sha256-UqpRHLN0INpW6sA8DbQCSeL8uhS+IoW60UPVUIh1NY0=";
   };
 
+  patches = [
+    # Fix `IndexError: list assignment index out of range` with torch >= 2.13
+    # https://github.com/facebookresearch/xformers/commit/f06b9a7b0db97a78913ca8dc1652468a0527dc80
+    (fetchpatch {
+      name = "xformers-fix-tests-pytorch-2.13.patch";
+      url = "https://github.com/facebookresearch/xformers/commit/f06b9a7b0db97a78913ca8dc1652468a0527dc80.patch";
+      hash = "sha256-QE3hmwXI3yJBgRWOHKoDUaEsFO+vuqV+DTMW7sjuURU=";
+    })
+  ];
+
   # ModuleNotFoundError: No module named 'xformers.components'
   postPatch = ''
     touch xformers/components/__init__.py