diff --git a/pkgs/development/python-modules/pysatochip/default.nix b/pkgs/development/python-modules/pysatochip/default.nix
index 4b9d18968803f..0921aa790e80e 100644
--- a/pkgs/development/python-modules/pysatochip/default.nix
+++ b/pkgs/development/python-modules/pysatochip/default.nix
@@ -1,7 +1,7 @@
 {
   lib,
   buildPythonPackage,
-  fetchPypi,
+  fetchFromGitHub,
   certifi,
   cryptography,
   ecdsa,
@@ -17,18 +17,13 @@ buildPythonPackage rec {
   format = "setuptools";
   disabled = pythonOlder "3.6";
 
-  src = fetchPypi {
-    inherit pname version;
-    hash = "sha256-ccyBvQ00p/uDULzGeJIhIJIiRRrFitsp271wep74DHI=";
+  src = fetchFromGitHub {
+    owner = "toporin";
+    repo = "pysatochip";
+    rev = "v${version}";
+    hash = "sha256-7wA9erk2OA1FyNSzOSWJzjyp9QeYq6C+YA8B0Dk2iQE=";
   };
 
-  postPatch = ''
-    substituteInPlace requirements.txt \
-      --replace "cryptography==3.3.2" "cryptography" \
-      --replace "ecdsa==0.15" "ecdsa" \
-      --replace "pyopenssl==20.0.0" "pyopenssl"
-  '';
-
   propagatedBuildInputs = [
     cryptography
     ecdsa