From 88864856b4ee6b74312445c26a3103982f7bd4f6 Mon Sep 17 00:00:00 2001
From: Jack Betteridge <J.Betteridge@imperial.ac.uk>
Date: Fri, 24 Nov 2023 18:33:35 +0000
Subject: [PATCH] Allow get_include to handle sdist installations

---
 rtree/core.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/rtree/core.py b/rtree/core.py
index 700abd15..0572c5bf 100644
--- a/rtree/core.py
+++ b/rtree/core.py
@@ -75,8 +75,9 @@ def free_error_msg_ptr(result, func, cargs):
 
 def get_include():
     import rtree
-
-    return os.path.join(os.path.dirname(rtree.__file__), "include")
+    from importlib import resources
+    include_dir = resources.files(rtree).joinpath('include')
+    return str(include_dir) if include_dir.is_dir() else ''
 
 
 # load the shared library by looking in likely places