diff --git a/pkgs/tools/networking/mitmproxy/default.nix b/pkgs/tools/networking/mitmproxy/default.nix
index 7348cd7f1165..f96987a1300b 100644
--- a/pkgs/tools/networking/mitmproxy/default.nix
+++ b/pkgs/tools/networking/mitmproxy/default.nix
@@ -1,82 +1,32 @@
 { stdenv, fetchpatch, fetchFromGitHub, fetchurl, python3, glibcLocales }:
 
-let
-  p = python3.override {
-    packageOverrides = self: super: {
-      cryptography = super.cryptography.overridePythonAttrs (oldAttrs: rec {
-        version = "1.8.2";
-        name = "${oldAttrs.pname}-${version}";
-        src = oldAttrs.src.override {
-          inherit version;
-          sha256 = "8e88ebac371a388024dab3ccf393bf3c1790d21bc3c299d5a6f9f83fb823beda";
-        };
-      });
-      cryptography_vectors = super.cryptography_vectors.overridePythonAttrs (oldAttrs: rec {
-        version = self.cryptography.version;
-        name = "${oldAttrs.pname}-${version}";
-        src = oldAttrs.src.override {
-          inherit version;
-          sha256 = "00daa04c9870345f56605d91d7d4897bc1b16f6fff7c74cb602b08ef16c0fb43";
-        };
-      });
-      pyopenssl = super.pyopenssl.overridePythonAttrs (oldAttrs: rec {
-        version = "17.0.0";
-        name = "${oldAttrs.pname}-${version}";
-        src = oldAttrs.src.override {
-          inherit version;
-          sha256 = "1pdg1gpmkzj8yasg6cmkhcivxcdp4c12nif88y4qvsxq5ffzxas8";
-        };
-        patches = fetchpatch {
-          url = "https://github.com/pyca/pyopenssl/commit/"
-              + "a40898b5f1d472f9449a344f703fa7f90cddc21d.patch";
-          sha256 = "0bdfrhfvdfxhfknn46s4db23i3hww6ami2r1l5rfrri0pn8b8mh7";
-        };
-      });
-    };
-  };
-in p.pkgs.buildPythonPackage rec {
+python3.pkgs.buildPythonPackage rec {
   baseName = "mitmproxy";
-  name = "${baseName}-${version}";
-  version = "2.0.2";
+  name = "${baseName}-unstable-2017-10-31";
 
   src = fetchFromGitHub {
     owner = baseName;
     repo = baseName;
-    rev = "v${version}";
-    sha256 = "1x1a28al5clpfd69rjcpw26gjjnpsm1vfl4scrwpdd1jhkw044h9";
+    rev = "80a8eaa708ea31dd9c5e7e1ab6b02c69079039c0";
+    sha256 = "0rvwm11yryzlp3c1i42rk2iv1m38yn6r83k41jb51hwg6wzbwzvw";
   };
 
-  patches = [
-    # fix tests
-    (fetchpatch {
-      url = "https://github.com/mitmproxy/mitmproxy/commit/b3525570929ba47c10d9d08696876c39487f7000.patch";
-      sha256 = "111fld5gqdii7rs1jhqaqrxgbyhfn6qd0y7l15k4npamsnvdnv20";
-    })
-    # bump pyOpenSSL
-    (fetchpatch {
-      url = https://github.com/mitmproxy/mitmproxy/commit/6af72160bf98b58682b8f9fc5aabf51928d2b1d3.patch;
-      sha256 = "1q4ml81pq9c8j9iscq8janbxf4s37w3bqskbs6r30yqzy63v54f2";
-    })
-    # https://github.com/mitmproxy/mitmproxy/commit/3d7cde058b7e6242d93b9bc9d3e17520ffb578a5
-    ./tornado-4.6.patch
-  ];
-
   checkPhase = ''
     export HOME=$(mktemp -d)
     # test_echo resolves hostnames
-    LC_CTYPE=en_US.UTF-8 pytest -k 'not test_echo'
+    LC_CTYPE=en_US.UTF-8 pytest -k 'not test_echo and not test_find_unclaimed_URLs '
   '';
 
-  propagatedBuildInputs = with p.pkgs; [
-    blinker click certifi construct cryptography
-    cssutils editorconfig h2 html2text hyperframe
-    jsbeautifier kaitaistruct passlib pyasn1 pyopenssl
+  propagatedBuildInputs = with python3.pkgs; [
+    blinker click certifi cryptography
+    h2 hyperframe
+    kaitaistruct passlib pyasn1 pyopenssl
     pyparsing pyperclip requests ruamel_yaml tornado
-    urwid watchdog brotlipy sortedcontainers
+    urwid brotlipy sortedcontainers ldap3
   ];
 
-  buildInputs = with p.pkgs; [
-    beautifulsoup4 flask pytz pytest pytestrunner protobuf glibcLocales
+  buildInputs = with python3.pkgs; [
+    beautifulsoup4 flask pytest pytestrunner glibcLocales
   ];
 
   meta = with stdenv.lib; {