diff --git a/science/arbor/Makefile b/science/arbor/Makefile
index d4bb0259284a..cb774c521698 100644
--- a/science/arbor/Makefile
+++ b/science/arbor/Makefile
@@ -1,44 +1,46 @@
 PORTNAME=	arbor
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.8.1
+DISTVERSION=	0.9.0
 CATEGORIES=	science
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Multi-compartment neural network simulation library
 WWW=		https://arbor-sim.org/
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
 BROKEN_armv7=	compilation fails: unknown type name 'float64x2_t'
 
 BUILD_DEPENDS=	bash:shells/bash \
 		libfmt>0:devel/libfmt \
 		nlohmann-json>0:devel/nlohmann-json \
 		random123>0:devel/random123 \
 		${PYTHON_PKGNAMEPREFIX}svgwrite>0:graphics/py-svgwrite@${PY_FLAVOR}
-LIB_DEPENDS=	libpugixml.so:textproc/pugixml
+BUILD_DEPENDS+=	${LOCALBASE}/lib/cmake/GTest/GTestConfig.cmake:devel/googletest # https://github.com/arbor-sim/arbor/issues/2205
+LIB_DEPENDS=	libhwloc.so:devel/hwloc2 \
+		libpugixml.so:textproc/pugixml
 RUN_DEPENDS=	${PYTHON_PKGNAMEPREFIX}svgwrite>0:graphics/py-svgwrite@${PY_FLAVOR}
 TEST_DEPENDS=	googletest>=0:devel/googletest
 
 USES=		cmake compiler:c++17-lang localbase python shebangfix
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	arbor-sim
 
 SHEBANG_FILES=	scripts/arbor-build-catalogue
 
 CMAKE_ON=	BUILD_SHARED_LIBS
 CMAKE_ARGS=	-DPython3_EXECUTABLE=${PYTHON_CMD}
 
 OPTIONS_DEFINE=		NATIVE
 
 NATIVE_CMAKE_ON=	-DARB_ARCH=native
 NATIVE_CMAKE_OFF=	-DARB_ARCH=none
 
 TEST_TARGET=	tests # tests fail to build, see https://github.com/arbor-sim/arbor/issues/2075
 
 post-install:
 	@${RMDIR} ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>
diff --git a/science/arbor/distinfo b/science/arbor/distinfo
index 2fd4d9cc91b9..467206167c80 100644
--- a/science/arbor/distinfo
+++ b/science/arbor/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1671842310
-SHA256 (arbor-sim-arbor-v0.8.1_GH0.tar.gz) = 9d32edf5def9bbe30b5648d064291b86cf3f637b2dc0b82f7a276f5f41e6bcef
-SIZE (arbor-sim-arbor-v0.8.1_GH0.tar.gz) = 7812575
+TIMESTAMP = 1691736150
+SHA256 (arbor-sim-arbor-v0.9.0_GH0.tar.gz) = 920c7926453379d367c6c8bb01ff867c03e44e8a7a6a5655d5eaa3d692618ca1
+SIZE (arbor-sim-arbor-v0.9.0_GH0.tar.gz) = 10164524
diff --git a/science/arbor/pkg-plist b/science/arbor/pkg-plist
index 88f635490f8f..4afab017bce6 100644
--- a/science/arbor/pkg-plist
+++ b/science/arbor/pkg-plist
@@ -1,113 +1,119 @@
 bin/arbor-build-catalogue
 bin/lmorpho
 bin/modcc
 include/arbor/arb_types.h
 include/arbor/arb_types.hpp
 include/arbor/arb_types.inc
 include/arbor/arbexcept.hpp
 include/arbor/assert.hpp
 include/arbor/assert_macro.hpp
 include/arbor/benchmark_cell.hpp
 include/arbor/cable_cell.hpp
 include/arbor/cable_cell_param.hpp
 include/arbor/common_types.hpp
 include/arbor/communication/mpi_error.hpp
+include/arbor/communication/remote.hpp
 include/arbor/constants.hpp
 include/arbor/context.hpp
 include/arbor/cv_policy.hpp
 include/arbor/domain_decomposition.hpp
 include/arbor/domdecexcept.hpp
 include/arbor/event_generator.hpp
 include/arbor/export.hpp
 include/arbor/fvm_types.hpp
 include/arbor/generic_event.hpp
 include/arbor/gpu/cuda_api.hpp
 include/arbor/gpu/gpu_api.hpp
 include/arbor/gpu/gpu_common.hpp
 include/arbor/gpu/hip_api.hpp
 include/arbor/gpu/math_cu.hpp
 include/arbor/gpu/reduce_by_key.hpp
 include/arbor/iexpr.hpp
 include/arbor/lif_cell.hpp
 include/arbor/load_balance.hpp
 include/arbor/math.hpp
 include/arbor/mechanism.hpp
 include/arbor/mechanism_abi.h
 include/arbor/mechcat.hpp
 include/arbor/mechinfo.hpp
 include/arbor/morph/cv_data.hpp
 include/arbor/morph/embed_pwlin.hpp
 include/arbor/morph/isometry.hpp
 include/arbor/morph/label_dict.hpp
 include/arbor/morph/locset.hpp
 include/arbor/morph/mcable_map.hpp
 include/arbor/morph/morphexcept.hpp
 include/arbor/morph/morphology.hpp
 include/arbor/morph/mprovider.hpp
 include/arbor/morph/place_pwlin.hpp
 include/arbor/morph/primitives.hpp
 include/arbor/morph/region.hpp
 include/arbor/morph/segment_tree.hpp
 include/arbor/morph/stitch.hpp
 include/arbor/profile/clock.hpp
 include/arbor/profile/meter.hpp
 include/arbor/profile/meter_manager.hpp
 include/arbor/profile/profiler.hpp
 include/arbor/profile/timer.hpp
 include/arbor/recipe.hpp
 include/arbor/s_expr.hpp
 include/arbor/sampling.hpp
 include/arbor/schedule.hpp
+include/arbor/serdes.hpp
 include/arbor/simd/approx.hpp
 include/arbor/simd/avx.hpp
 include/arbor/simd/avx512.hpp
 include/arbor/simd/generic.hpp
 include/arbor/simd/implbase.hpp
 include/arbor/simd/native.hpp
 include/arbor/simd/neon.hpp
 include/arbor/simd/simd.hpp
 include/arbor/simd/simd_io.hpp
 include/arbor/simd/sve.hpp
+include/arbor/simd/sve_bits.hpp
+include/arbor/simd/vls_sve.hpp
+include/arbor/simd/vls_sve_bits.hpp
 include/arbor/simple_sampler.hpp
 include/arbor/simulation.hpp
 include/arbor/spike.hpp
 include/arbor/spike_event.hpp
 include/arbor/spike_source_cell.hpp
 include/arbor/symmetric_recipe.hpp
 include/arbor/util/any_cast.hpp
 include/arbor/util/any_ptr.hpp
 include/arbor/util/any_visitor.hpp
 include/arbor/util/compat.hpp
 include/arbor/util/expected.hpp
 include/arbor/util/extra_traits.hpp
 include/arbor/util/handle_set.hpp
 include/arbor/util/hash_def.hpp
 include/arbor/util/lexcmp_def.hpp
 include/arbor/util/pp_util.hpp
 include/arbor/util/scope_exit.hpp
 include/arbor/util/typed_map.hpp
 include/arbor/util/uninitialized.hpp
 include/arbor/util/unique_any.hpp
 include/arbor/util/visibility.hpp
 include/arbor/version.hpp
 include/arborenv/arbenvexcept.hpp
 include/arborenv/concurrency.hpp
 include/arborenv/default_env.hpp
 include/arborenv/export.hpp
 include/arborenv/gpu_env.hpp
 include/arborenv/with_mpi.hpp
 include/arborio/cableio.hpp
 include/arborio/cv_policy_parse.hpp
 include/arborio/export.hpp
+include/arborio/json_serdes.hpp
 include/arborio/label_parse.hpp
 include/arborio/neurolucida.hpp
 include/arborio/neuroml.hpp
 include/arborio/swcio.hpp
 lib/cmake/arbor/arbor-config-version.cmake
 lib/cmake/arbor/arbor-config.cmake
 lib/cmake/arbor/arbor-targets-%%CMAKE_BUILD_TYPE%%.cmake
 lib/cmake/arbor/arbor-targets.cmake
 lib/libarbor.so
 lib/libarborenv.so
 lib/libarborio.so
 %%DATADIR%%/BuildModules.cmake
diff --git a/science/py-arbor/Makefile b/science/py-arbor/Makefile
index 8bd2028e8784..b6e559395a89 100644
--- a/science/py-arbor/Makefile
+++ b/science/py-arbor/Makefile
@@ -1,36 +1,37 @@
 PORTNAME=	arbor
 DISTVERSIONPREFIX=	v
-DISTVERSION=	0.8.1
+DISTVERSION=	0.9.0
 CATEGORIES=	science
 PKGNAMEPREFIX=	${PYTHON_PKGNAMEPREFIX}
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Multi-compartment neural network simulation library
 WWW=		https://arbor-sim.org/
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/../LICENSE
 
-BUILD_DEPENDS=	pybind11>0:devel/pybind11
+BUILD_DEPENDS=	pybind11>0:devel/pybind11 \
+		nlohmann-json>0:devel/nlohmann-json
 LIB_DEPENDS=	libarbor.so:science/arbor
 
 USES=		cmake compiler:c++17-lang localbase:ldflags python
 USE_PYTHON=	flavors
 
 USE_GITHUB=	yes
 GH_ACCOUNT=	arbor-sim
 
 WRKSRC_SUBDIR=	python
 
 CMAKE_ARGS=	-DPython3_EXECUTABLE=${PYTHON_CMD} \
 		-DARB_PYTHON_LIB_PATH=${PYTHONPREFIX_SITELIBDIR}
 
 CXXFLAGS+=	-fPIC
 
 post-patch:
 	@${ECHO} ${DISTVERSION} > ${WRKSRC}/VERSION
 
 post-install:
 	@${STRIP_CMD} ${STAGEDIR}${PYTHON_SITELIBDIR}/arbor/_arbor${PYTHON_EXT_SUFFIX}.so
 
 .include <bsd.port.mk>
diff --git a/science/py-arbor/distinfo b/science/py-arbor/distinfo
index 4c6eb0df5332..249aad786e70 100644
--- a/science/py-arbor/distinfo
+++ b/science/py-arbor/distinfo
@@ -1,3 +1,3 @@
-TIMESTAMP = 1671874647
-SHA256 (arbor-sim-arbor-v0.8.1_GH0.tar.gz) = 9d32edf5def9bbe30b5648d064291b86cf3f637b2dc0b82f7a276f5f41e6bcef
-SIZE (arbor-sim-arbor-v0.8.1_GH0.tar.gz) = 7812575
+TIMESTAMP = 1691740349
+SHA256 (arbor-sim-arbor-v0.9.0_GH0.tar.gz) = 920c7926453379d367c6c8bb01ff867c03e44e8a7a6a5655d5eaa3d692618ca1
+SIZE (arbor-sim-arbor-v0.9.0_GH0.tar.gz) = 10164524
diff --git a/science/py-arbor/files/patch-CMakeLists.txt b/science/py-arbor/files/patch-CMakeLists.txt
index 9441da10091c..988f55467741 100644
--- a/science/py-arbor/files/patch-CMakeLists.txt
+++ b/science/py-arbor/files/patch-CMakeLists.txt
@@ -1,28 +1,34 @@
---- CMakeLists.txt.orig	2022-11-15 15:19:19 UTC
+--- CMakeLists.txt.orig	2023-08-10 09:47:38 UTC
 +++ CMakeLists.txt
 @@ -1,3 +1,7 @@
 +cmake_minimum_required(VERSION 3.19)
 +
 +find_package(Python3 ${arb_py_version} COMPONENTS Interpreter Development REQUIRED)
 +
  include(GNUInstallDirs)
  
  set(PYBIND11_CPP_STANDARD -std=c++17)
-@@ -79,14 +83,14 @@ if (ARB_WITH_MPI)
+@@ -80,14 +84,14 @@ if (ARB_WITH_MPI)
  endif()
  
  # For unit tests on C++ side of Python wrappers
 -add_subdirectory(test)
 +#add_subdirectory(test)
  
  # Create the Python module in the build directory.
  # The module contains the dynamic library, __init__.py and VERSION information.
  set(python_mod_path "${CMAKE_CURRENT_BINARY_DIR}/arbor")
  set_target_properties(pyarb PROPERTIES LIBRARY_OUTPUT_DIRECTORY "${python_mod_path}")
 -file(COPY "${PROJECT_SOURCE_DIR}/python/__init__.py" DESTINATION "${python_mod_path}")
 -file(COPY "${PROJECT_SOURCE_DIR}/VERSION" DESTINATION "${python_mod_path}")
 +file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/__init__.py" DESTINATION "${python_mod_path}")
 +file(COPY "${CMAKE_CURRENT_SOURCE_DIR}/VERSION" DESTINATION "${python_mod_path}")
  
  # Set the installation path
  
+@@ -117,4 +121,4 @@ endif()
+ 
+ install(TARGETS pyarb DESTINATION ${_python_module_install_path})
+ install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/__init__.py DESTINATION ${_python_module_install_path})
+-install(FILES ${PROJECT_SOURCE_DIR}/VERSION ${PROJECT_SOURCE_DIR}/README.md ${PROJECT_SOURCE_DIR}/LICENSE DESTINATION ${_python_module_install_path})
++install(FILES ${CMAKE_CURRENT_SOURCE_DIR}/../VERSION DESTINATION ${_python_module_install_path})