diff --git a/arbor.spec b/arbor.spec
index b6f2482..d91e333 100644
--- a/arbor.spec
+++ b/arbor.spec
@@ -33,18 +33,21 @@ Source0:        %forgesource
 # script to run examples
 Source1:        https://raw.githubusercontent.com/arbor-sim/arbor/master/scripts/run_python_examples.sh
 Source2:        https://raw.githubusercontent.com/arbor-sim/arbor/master/scripts/run_cpp_examples.sh
-License:        BSD
+License:        BSD-3-Clause
 
 Patch:          0001-Quote-various-cmake-var-values.patch
 # Add some missing #include directives
 # Fixes failure to compile with GCC 13.
 # https://github.com/arbor-sim/arbor/pull/2080
 Patch:          %{forgeurl}/pull/2080.patch
+# Replace use of LooseVersion from distutils.version (removed in Python3.12)
+# https://github.com/arbor-sim/arbor/pull/2157
+Patch:          looseversion.patch
 
 # Random123 does not support:
 #   mips64r2 mips32r2 s390
 # https://fedoraproject.org/wiki/Changes/EncourageI686LeafRemoval
-ExcludeArch:    mips64r2 mips32r2 s390 %{ix86}
+ExcludeArch:    mips64r2 mips32r2 s390x %{ix86}
 
 BuildRequires:  cmake
 BuildRequires:  make
@@ -60,6 +63,7 @@ BuildRequires:  python3-devel
 BuildRequires:  python3-setuptools
 BuildRequires:  Random123-devel
 BuildRequires:  tclap-devel
+BuildRequires:  pugixml-devel
 Provides:       python3-arbor = %{version}-%{release}
 
 # For validation, but we don't have these BRs
@@ -208,18 +212,10 @@ pushd build$MPI_COMPILE_TYPE  &&
         -DCMAKE_BUILD_TYPE:STRING="release" \\\
         -DARB_USE_BUNDLED_LIBS:BOOL=OFF \\\
         -DARB_USE_BUNDLED_PYBIND11:BOOL=OFF \\\
-%ifarch x86_64 i686 aarch64
-        -DARB_VECTORIZE:BOOL=ON \\\
-%else
         -DARB_VECTORIZE:BOOL=OFF \\\
-%endif
         -DARB_WITH_MPI:BOOL=$MPI_YES \\\
         -DARB_WITH_GPU:BOOL=OFF \\\
-%ifnarch s390x s390
-        -DARB_ARCH:STRING="native" \\\
-%else
         -DARB_ARCH:STRING="none" \\\
-%endif
         -DCMAKE_INSTALL_LIBDIR=%{_lib} \\\
         -DARB_WITH_PYTHON:BOOL=ON \\\
         -DARB_PYTHON_LIB_PATH:STRING=$MPI_PYTHON3_SITEARCH \\\
diff --git a/looseversion.patch b/looseversion.patch
new file mode 100644
index 0000000..65fde4a
--- /dev/null
+++ b/looseversion.patch
@@ -0,0 +1,25 @@
+diff --git a/pyproject.toml b/pyproject.toml
+index 0d732541..12e003e2 100644
+--- a/pyproject.toml
++++ b/pyproject.toml
+@@ -46,6 +46,7 @@ requires = [
+     "scikit-build",
+     "cmake>=3.18",
+     "ninja",
++    "looseversion",
+ ]
+ build-backend = "setuptools.build_meta"
+ 
+diff --git a/scripts/tsplot b/scripts/tsplot
+index c64e7b18..10ddf3f4 100755
+--- a/scripts/tsplot
++++ b/scripts/tsplot
+@@ -11,7 +11,7 @@ import matplotlib as M
+ import matplotlib.pyplot as P
+ import numbers
+ from functools import reduce
+-from distutils.version import LooseVersion
++from looseversion import LooseVersion
+ from itertools import chain, islice, cycle
+ 
+ # Run-time check for matplot lib version for line style functionality.