diff --git a/pkgs/applications/networking/flexget/default.nix b/pkgs/applications/networking/flexget/default.nix
index b8af1541809a..9afc61c3c0c4 100644
--- a/pkgs/applications/networking/flexget/default.nix
+++ b/pkgs/applications/networking/flexget/default.nix
@@ -1,4 +1,4 @@
-{ lib, python36 }:
+{ lib, python3 }:
 
 # Flexget have been a trouble maker in the past,
 # if you see flexget breaking when updating packages, don't worry.
@@ -6,7 +6,7 @@
 # -- Mic92
 
 let
-  python' = python36.override { inherit packageOverrides; };
+  python' = python3.override { inherit packageOverrides; };
 
   packageOverrides = self: super: {
     guessit = super.guessit.overridePythonAttrs (old: rec {
@@ -24,16 +24,14 @@ with python'.pkgs;
 
 buildPythonApplication rec {
   pname = "FlexGet";
-  version = "2.17.20";
+  version = "2.20.17";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "a09ef9482ed54f7e96eb8b4d08c59687c5c43a3341c9d2675383693e6c3681c3";
+    sha256 = "ed021d8d5c10555dad8dc1cb93c012e17b541fc25fc122b7ca76bb7e53fe82b3";
   };
 
   postPatch = ''
-    # build for the correct python version
-    substituteInPlace setup.cfg --replace $'[bdist_wheel]\npython-tag = py27' ""
     # remove dependency constraints
     sed 's/==\([0-9]\.\?\)\+//' -i requirements.txt
   '';
@@ -47,12 +45,13 @@ buildPythonApplication rec {
     beautifulsoup4 html5lib
     PyRSS2Gen pynzb rpyc jinja2
     requests dateutil jsonschema
-    pathpy guessit APScheduler
+    pathpy guessit rebulk APScheduler
     terminaltables colorclass
     cherrypy flask flask-restful
     flask-restplus flask-compress
     flask_login flask-cors
     pyparsing zxcvbn-python future
+    progressbar
     # Optional requirements
     deluge-client
     # Plugins
diff --git a/pkgs/development/python-modules/importlib-metadata/default.nix b/pkgs/development/python-modules/importlib-metadata/default.nix
index 55c835e75cce..046cfbad26b6 100644
--- a/pkgs/development/python-modules/importlib-metadata/default.nix
+++ b/pkgs/development/python-modules/importlib-metadata/default.nix
@@ -1,29 +1,36 @@
 { lib
 , buildPythonPackage
 , fetchPypi
+, setuptools_scm
+, zipp
 , pathlib2
 , contextlib2
+, configparser
 , isPy3k
 , importlib-resources
+, packaging
 }:
 
 buildPythonPackage rec {
   pname = "importlib-metadata";
-  version = "0.6";
+  version = "0.8";
 
   src = fetchPypi {
     pname = "importlib_metadata";
     inherit version;
-    sha256 = "36b02c84f9001adf65209fefdf951be8e9014a95eab9938c0779ad5670359b1c";
+    sha256 = "b50191ead8c70adfa12495fba19ce6d75f2e0275c14c5a7beb653d6799b512bd";
   };
 
-  propagatedBuildInputs = [] ++ lib.optionals (!isPy3k) [ pathlib2 contextlib2 ];
+  nativeBuildInputs = [ setuptools_scm ];
 
-  checkInputs = [ importlib-resources ];
+  propagatedBuildInputs = [ zipp ]
+    ++ lib.optionals (!isPy3k) [ pathlib2 contextlib2 configparser ];
+
+  checkInputs = [ importlib-resources packaging ];
 
   meta = with lib; {
     description = "Read metadata from Python packages";
     homepage = https://importlib-metadata.readthedocs.io/;
     license = licenses.asl20;
   };
-}
\ No newline at end of file
+}
diff --git a/pkgs/development/python-modules/progressbar/default.nix b/pkgs/development/python-modules/progressbar/default.nix
index a8e8bf07ad56..a68ecf59ad0e 100644
--- a/pkgs/development/python-modules/progressbar/default.nix
+++ b/pkgs/development/python-modules/progressbar/default.nix
@@ -4,9 +4,6 @@ buildPythonPackage rec {
   pname = "progressbar";
   version = "2.5";
 
-  # https://github.com/niltonvolpato/python-progressbar/issues/54
-  disabled = isPy3k;
-
   src = fetchPypi {
     inherit pname version;
     sha256 = "5d81cb529da2e223b53962afd6c8ca0f05c6670e40309a7219eacc36af9b6c63";
diff --git a/pkgs/development/python-modules/zipp/default.nix b/pkgs/development/python-modules/zipp/default.nix
new file mode 100644
index 000000000000..2c060c9881c0
--- /dev/null
+++ b/pkgs/development/python-modules/zipp/default.nix
@@ -0,0 +1,31 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, setuptools_scm
+, pytest
+, pytest-flake8
+}:
+
+buildPythonPackage rec {
+  pname = "zipp";
+  version = "0.3.3";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "55ca87266c38af6658b84db8cfb7343cdb0bf275f93c7afaea0d8e7a209c7478";
+  };
+
+  nativeBuildInputs = [ setuptools_scm ];
+
+  checkInputs = [ pytest pytest-flake8 ];
+
+  checkPhase = ''
+    pytest
+  '';
+
+  meta = with lib; {
+    description = "Pathlib-compatible object wrapper for zip files";
+    homepage = https://github.com/jaraco/zipp;
+    license = licenses.mit;
+  };
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index aad6a3976f40..1cabba8ea42f 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -4738,6 +4738,8 @@ in {
 
   zfec = callPackage ../development/python-modules/zfec { };
 
+  zipp = callPackage ../development/python-modules/zipp { };
+
   zope_broken = callPackage ../development/python-modules/zope_broken { };
 
   zope_component = callPackage ../development/python-modules/zope_component { };