diff --git a/pkgs/development/python-modules/pyahocorasick/default.nix b/pkgs/development/python-modules/pyahocorasick/default.nix
index 7bb2f7c988a9..56e5636622b8 100644
--- a/pkgs/development/python-modules/pyahocorasick/default.nix
+++ b/pkgs/development/python-modules/pyahocorasick/default.nix
@@ -1,6 +1,7 @@
 { lib
 , buildPythonPackage
 , fetchFromGitHub
+, fetchpatch
 , pytestCheckHook
 }:
 
@@ -15,10 +16,13 @@ buildPythonPackage rec {
     sha256 = "13x3718if28l50474xrz1b9709kvnvdg3nzm6y8bh7mc9a4zyss5";
   };
 
-  postPatch = ''
-    substituteInPlace unittests.py \
-        --replace '(tmp, "test.dat")' "(\"$TMPDIR\", \"test.dat\")"
-  '';
+  patches = [
+    # Use proper temporary directory on Hydra
+    (fetchpatch {
+      url = "https://github.com/WojciechMula/pyahocorasick/commit/b6549e06f3cced7ffdf4d1b587cd7de12041f495.patch";
+      sha256 = "sha256-v3J/0aIPOnBhLlJ18r/l7O0MckqLOCtcmqIS9ZegaSI=";
+    })
+  ];
 
   checkInputs = [ pytestCheckHook ];