diff -Naur xyce-9999_or/CMakeLists.txt xyce-9999/CMakeLists.txt
--- xyce-9999_or/CMakeLists.txt 2023-06-15 12:10:16.293228331 +0200
+++ xyce-9999/CMakeLists.txt    2023-06-15 12:35:46.624756996 +0200
@@ -15,6 +15,9 @@
 # the compilers and call project again.
 project(Xyce NONE)
 
+# Disable Kokkos warning about not supporting C++ extensions
+set(CMAKE_CXX_EXTENSIONS OFF)
+
 # A TriBITS project that performs a coupled build with Trilinos, like Charon,
 # changes the names of all the Trilinos variables.  Therefore, we have to jump
 # through a bunch of hoops to take that use case into account.  Here we set a
diff -Naur xyce-9999_or/cmake/tps.cmake xyce-9999/cmake/tps.cmake
diff -Naur xyce-9999_or/src/LinearAlgebraServicesPKG/N_LAS_TransformTool.C xyce-9999/src/LinearAlgebraServicesPKG/N_LAS_TransformTool.C
--- xyce-9999_or/src/LinearAlgebraServicesPKG/N_LAS_TransformTool.C     2023-06-15 19:12:44.585504630 +0200
+++ xyce-9999/src/LinearAlgebraServicesPKG/N_LAS_TransformTool.C        2023-06-15 19:16:03.513134501 +0200
@@ -53,6 +53,7 @@
 #include <EpetraExt_Isorropia_CrsGraph.h>
 #endif
 #endif
+#include <EpetraExt_Isorropia_CrsGraph.h>
 
 #ifdef Xyce_AMD
 #include <EpetraExt_AMD_CrsGraph.h>