python3Packages.screeninfo: fix build

pkgs/development/python-modules/screeninfo/default.nix

@@ -1,36 +1,50 @@
-{ lib, buildPythonApplication, fetchPypi, isPy27, isPy36, dataclasses, libX11, libXinerama, libXrandr }:
+{ lib
+, buildPythonApplication
+, dataclasses
+, fetchPypi
+, libX11
+, libXinerama
+, libXrandr
+, pytestCheckHook
+, pythonOlder
+}:
 
 buildPythonApplication rec {
   pname = "screeninfo";
   version = "0.7";
-  disabled = isPy27; # dataclasses isn't available for python2
+
+  disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
     sha256 = "12a97c3527e3544ac5dbd7c1204283e2653d655cbd15844c990a83b1b13ef500";
   };
 
-  # dataclasses is a compatibility shim for python 3.6 ONLY
-  patchPhase = if isPy36 then "" else ''
-    substituteInPlace setup.py \
-      --replace "\"dataclasses\"," ""
-  '' + ''
-    substituteInPlace screeninfo/enumerators/xinerama.py \
-      --replace "load_library(\"X11\")" "ctypes.cdll.LoadLibrary(\"${libX11}/lib/libX11.so\")" \
-      --replace "load_library(\"Xinerama\")" "ctypes.cdll.LoadLibrary(\"${libXinerama}/lib/libXinerama.so\")"
-    substituteInPlace screeninfo/enumerators/xrandr.py \
-      --replace "load_library(\"X11\")" "ctypes.cdll.LoadLibrary(\"${libX11}/lib/libX11.so\")" \
-      --replace "load_library(\"Xrandr\")" "ctypes.cdll.LoadLibrary(\"${libXrandr}/lib/libXrandr.so\")"
-  '';
+  propagatedBuildInputs = lib.optionals (pythonOlder "3.7") [
+    dataclasses
+  ];
 
-  propagatedBuildInputs = lib.optional isPy36 dataclasses;
+  buildInputs = [
+    libX11
+    libXinerama
+    libXrandr
+  ];
 
-  buildInputs = [ libX11 libXinerama libXrandr];
+  checkInputs = [
+    pytestCheckHook
+  ];
+
+  disabledTestPaths = [
+    # We don't have a screen
+    "screeninfo/test_screeninfo.py"
+  ];
+
+  pythonImportsCheck = [ "screeninfo" ];
 
   meta = with lib; {
     description = "Fetch location and size of physical screens";
     homepage = "https://github.com/rr-/screeninfo";
     license = licenses.mit;
-    maintainers = [ maintainers.nickhu ];
+    maintainers = with maintainers; [ nickhu ];
   };
 }