diff --git a/pkgs/tools/text/transifex-client/default.nix b/pkgs/tools/text/transifex-client/default.nix
index 1174c2f382e3..ae23e5775592 100644
--- a/pkgs/tools/text/transifex-client/default.nix
+++ b/pkgs/tools/text/transifex-client/default.nix
@@ -1,24 +1,36 @@
-{ lib, buildPythonApplication, fetchPypi
-, python-slugify, requests, urllib3, six, setuptools, GitPython }:
+{ lib
+, buildPythonApplication
+, fetchPypi
+, python-slugify
+, requests
+, urllib3
+, six
+, setuptools
+, GitPython
+, pythonRelaxDepsHook
+}:
 
 buildPythonApplication rec {
   pname = "transifex-client";
   version = "0.14.4";
 
-  propagatedBuildInputs = [
-    urllib3 requests python-slugify six setuptools GitPython
-  ];
-
   src = fetchPypi {
     inherit pname version;
     sha256 = "11dc95cefe90ebf0cef3749c8c7d85b9d389c05bd0e3389bf117685df562bd5c";
   };
 
   # https://github.com/transifex/transifex-client/issues/323
-  prePatch = ''
-    substituteInPlace requirements.txt \
-      --replace "python-slugify<5.0.0" "python-slugify"
-  '';
+  nativeBuildInputs = [ pythonRelaxDepsHook ];
+  pythonRelaxDeps = [ "python-slugify" ];
+
+  propagatedBuildInputs = [
+    GitPython
+    python-slugify
+    requests
+    setuptools
+    six
+    urllib3
+  ];
 
   # Requires external resources
   doCheck = false;
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 087d384479b7..b6ff5da1d143 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -11585,7 +11585,7 @@ with pkgs;
 
   transcrypt = callPackage ../applications/version-management/git-and-tools/transcrypt { };
 
-  transifex-client = python3.pkgs.callPackage ../tools/text/transifex-client { };
+  transifex-client = python39.pkgs.callPackage ../tools/text/transifex-client { };
 
   translate-shell = callPackage ../applications/misc/translate-shell { };