python3Packages.imageio-ffmpeg: 0.4.2 -> 0.4.3

Also hardcode path to ffmpeg executable.
Can be overridden using $IMAGEIO_FFMPEG_EXE.

pkgs/development/python-modules/imageio-ffmpeg/default.nix

@@ -1,29 +1,42 @@
 { lib
 , buildPythonPackage
-, fetchPypi
-, fetchpatch
 , isPy3k
+, fetchPypi
+, substituteAll
+, ffmpeg
+, python
 }:
 
 buildPythonPackage rec {
   pname = "imageio-ffmpeg";
-  version = "0.4.2";
-
-  src = fetchPypi {
-    inherit pname version;
-    sha256 = "13b05b17a941a9f4a90b16910b1ffac159448cff051a153da8ba4b4343ffa195";
-  };
-  patches = [ (fetchpatch {
-    # Fixes compatibility with python3.9
-    # Should be included in the next release after 0.4.2
-    url = "https://github.com/imageio/imageio-ffmpeg/pull/43/commits/b90c39fe3d29418d67d953588ed9fdf4d848f811.patch";
-    sha256 = "0d9kf4w6ldwag3s2dr9zjin6wrj66fnl4fn8379ci4q4qfsqgx3f";
-  })];
+  version = "0.4.3";
 
   disabled = !isPy3k;
 
-  # No test infrastructure in repository.
-  doCheck = false;
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "f826260a3207b872f1a4ba87ec0c8e02c00afba4fd03348a59049bdd8215841e";
+  };
+
+  patches = [
+    (substituteAll {
+      src = ./ffmpeg-path.patch;
+      ffmpeg = "${ffmpeg}/bin/ffmpeg";
+    })
+  ];
+
+  checkPhase = ''
+    runHook preCheck
+
+    ${python.interpreter} << EOF
+    from imageio_ffmpeg import get_ffmpeg_version
+    assert get_ffmpeg_version() == '${ffmpeg.version}'
+    EOF
+
+    runHook postCheck
+  '';
+
+  pythonImportsCheck = [ "imageio_ffmpeg" ];
 
   meta = with lib; {
     description = "FFMPEG wrapper for Python";