python.pkgs.geopandas: 0.8.0 -> 0.8.1

This fixes the geopandas build, which did break with the update of
pandas from 1.0.5 to 1.1.0.

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

@@ -1,19 +1,27 @@
 { stdenv, buildPythonPackage, fetchFromGitHub, isPy27
 , pandas, shapely, fiona, descartes, pyproj
-, pytest, Rtree }:
+, pytest, Rtree, fetchpatch }:
 
 buildPythonPackage rec {
   pname = "geopandas";
-  version = "0.8.0";
+  version = "0.8.1";
   disabled = isPy27;
 
   src = fetchFromGitHub {
     owner = "geopandas";
     repo = "geopandas";
     rev = "v${version}";
-    sha256 = "033jygbyycl9s6b0kqix9xynhapc2xd8nh47kcfacn514gyncgah";
+    sha256 = "0618p0s0biisxk2s0h43hkc3bs1nwjk84rxbfyd6brfvs9yx4vq7";
   };
 
+  patches = [
+    # Fix for test test_numerical_operations: https://github.com/geopandas/geopandas/issues/1541
+    (fetchpatch {
+      url = "https://github.com/geopandas/geopandas/pull/1544/commits/6ce868a33a2f483b071089d51e178030fa4414d0.patch";
+      sha256 = "1sjgxrqgbhz5krx51hrv230ywszcdl6z8q3bj6830kfad8n8b5dq";
+    })
+  ];
+
   checkInputs = [ pytest Rtree ];
 
   checkPhase = ''