trying to fix RTD build

.readthedocs.yaml

@@ -7,9 +7,9 @@ version: 2
 
 # Set the version of Python and other tools you might need
 build:
-  os: ubuntu-22.04
+  os: ubuntu-latest
   tools:
-    python: "3.10"
+    python: "3.11"
 
 
 # Build documentation in the docs/ directory with Sphinx

docs/source/conf.py

@@ -3,10 +3,18 @@
 # -- Path setup --------------------------------------------------------------
 
 import os
-import sys
 
-sys.path.insert(0, os.path.abspath("../../"))
-import balltree  # noqa: E402
+try:
+    try:  # user has installed the package
+        import balltree
+    except ImportError:  # try local package location
+        import sys
+
+        sys.path.insert(0, os.path.abspath("../.."))
+        import balltree
+except ImportError as e:
+    if "core._math" in e.args[0]:
+        raise RuntimeError("balltree must be compiled") from e
 
 # -- Project information -----------------------------------------------------
 

pyproject.toml

@@ -35,6 +35,7 @@ dependencies = [
 
 [project.urls]
 source = "https://github.com/jlvdb/balltree.git"
+documentation = "https://balltree.readthedocs.io/"
 
 [project.optional-dependencies]
 test = [