python3Packages.Rtree: fix build

Patching broke on recent version bump, this fixes and re-enables tests.
Also corrects license.

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

@@ -1,4 +1,11 @@
-{ lib, stdenv, buildPythonPackage, fetchPypi, libspatialindex, numpy }:
+{ lib,
+  stdenv,
+  buildPythonPackage,
+  fetchPypi,
+  libspatialindex,
+  numpy,
+  pytestCheckHook
+}:
 
 buildPythonPackage rec {
   pname = "Rtree";
@@ -9,21 +16,23 @@ buildPythonPackage rec {
     sha256 = "be8772ca34699a9ad3fb4cfe2cfb6629854e453c10b3328039301bbfc128ca3e";
   };
 
-  propagatedBuildInputs = [ libspatialindex ];
+  buildInputs = [ libspatialindex ];
 
   patchPhase = ''
-    substituteInPlace rtree/core.py --replace \
+    substituteInPlace rtree/finder.py --replace \
       "find_library('spatialindex_c')" "'${libspatialindex}/lib/libspatialindex_c${stdenv.hostPlatform.extensions.sharedLibrary}'"
   '';
 
-  # Tests appear to be broken due to mysterious memory unsafe issues. See #36760
-  doCheck = false;
-  checkInputs = [ numpy ];
+  checkInputs = [
+    numpy
+    pytestCheckHook
+  ];
+  pythonImportsCheck = [ "rtree" ];
 
   meta = with lib; {
     description = "R-Tree spatial index for Python GIS";
     homepage = "https://toblerity.org/rtree/";
-    license = licenses.lgpl21;
+    license = licenses.mit;
     maintainers = with maintainers; [ bgamari ];
   };
 }