diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 2c52732be98f..f3ed5f898327 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -14587,13 +14587,17 @@ in {
       sha256 = "04ja1cl8xzqnwrd2gi6nlnxbmjri141bzwa5gybvr44d8h3k2nfa";
     };
 
-    patchPhase = ''
+    postPatch = ''
       substituteInPlace setup.py --replace "version=versioneer.get_version()" "version='${version}'"
+      substituteInPlace setup.py --replace "argparse" ""
     '';
 
     propagatedBuildInputs = with self;
       [ pyptlib argparse twisted pycrypto pyyaml ];
 
+    # No tests in archive
+    doCheck = false;
+
     meta = {
       description = "A pluggable transport proxy";
       homepage = https://www.torproject.org/projects/obfsproxy;