From d740da04881793cd9919c2c9b35016ba5a31342f Mon Sep 17 00:00:00 2001
From: schnellerhase <56360279+schnellerhase@users.noreply.github.com>
Date: Wed, 29 Jan 2025 11:49:20 +0100
Subject: [PATCH 1/2] Use dolfinx get_include to retrieve include path

---
 multiphenicsx/cpp/CMakeLists.txt | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/multiphenicsx/cpp/CMakeLists.txt b/multiphenicsx/cpp/CMakeLists.txt
index a1b9ee8..aff0e9f 100644
--- a/multiphenicsx/cpp/CMakeLists.txt
+++ b/multiphenicsx/cpp/CMakeLists.txt
@@ -41,9 +41,7 @@ endif()
 
 # Check for DOLFINx python wrappers
 execute_process(
-  COMMAND
-    ${Python_EXECUTABLE} -c
-    "import os, sys, dolfinx; print(os.path.join(os.path.dirname(dolfinx.__file__), 'wrappers'))"
+  COMMAND ${Python_EXECUTABLE} -c "import dolfinx; print(dolfinx.get_include())"
   OUTPUT_VARIABLE DOLFINX_PY_WRAPPERS_DIR
   RESULT_VARIABLE DOLFINX_PY_WRAPPERS_COMMAND_RESULT
   ERROR_VARIABLE DOLFINX_PY_WRAPPERS_COMMAND_ERROR

From deb34496dc444c3de91d3963e529a3893b419b02 Mon Sep 17 00:00:00 2001
From: schnellerhase <56360279+schnellerhase@users.noreply.github.com>
Date: Wed, 29 Jan 2025 11:51:43 +0100
Subject: [PATCH 2/2] Add warning info about possible absence of
 '--no-build-isolation'

---
 multiphenicsx/cpp/CMakeLists.txt | 20 ++++++++++++++++----
 1 file changed, 16 insertions(+), 4 deletions(-)

diff --git a/multiphenicsx/cpp/CMakeLists.txt b/multiphenicsx/cpp/CMakeLists.txt
index aff0e9f..de86042 100644
--- a/multiphenicsx/cpp/CMakeLists.txt
+++ b/multiphenicsx/cpp/CMakeLists.txt
@@ -30,7 +30,10 @@ if(NOT NANOBIND_CMAKE_DIR_COMMAND_RESULT)
   find_package(nanobind CONFIG REQUIRED)
   message(STATUS "Found nanobind python wrappers at ${NANOBIND_CMAKE_DIR}")
 else()
-  message(FATAL_ERROR "nanobind could not be found.")
+  message(
+    FATAL_ERROR
+      "nanobind could not be found. Possibly caused by running without '--no-build-isolation'."
+  )
 endif()
 
 # Check for DOLFINx C++ backend
@@ -51,7 +54,10 @@ execute_process(
 if(NOT DOLFINX_PY_WRAPPERS_COMMAND_RESULT)
   message(STATUS "Found DOLFINx python wrappers at ${DOLFINX_PY_WRAPPERS_DIR}")
 else()
-  message(FATAL_ERROR "DOLFINx python wrappers could not be found.")
+  message(
+    FATAL_ERROR
+      "DOLFINx python wrappers could not be found. Possibly caused by running without '--no-build-isolation'."
+  )
 endif()
 
 # Check for petsc4py
@@ -67,7 +73,10 @@ execute_process(
 if(NOT PETSC4PY_INCLUDE_COMMAND_RESULT)
   message(STATUS "Found petsc4py include directory at ${PETSC4PY_INCLUDE_DIR}")
 else()
-  message(FATAL_ERROR "petsc4py could not be found.")
+  message(
+    FATAL_ERROR
+      "petsc4py could not be found. Possibly caused by running without '--no-build-isolation'."
+  )
 endif()
 
 # Check for mpi4py
@@ -82,7 +91,10 @@ execute_process(
 if(NOT MPI4PY_INCLUDE_COMMAND_RESULT)
   message(STATUS "Found mpi4py include directory at ${MPI4PY_INCLUDE_DIR}")
 else()
-  message(FATAL_ERROR "mpi4py could not be found.")
+  message(
+    FATAL_ERROR
+      "mpi4py could not be found. Possibly caused by running without '--no-build-isolation'."
+  )
 endif()
 
 # Compile multiphenicsx C++ backend and nanobind wrappers