v2026.10.0

Spack packages v2026.10.0

The v2026.10.0 release of the spack packages along with version 1.2 of
the Spack tool. This release brings new packages and package version updates
and deprecations that are not made available via backports to previous releases.

Build Cache

The release tag build cache is published as a snapshot view under the the releases/v2026.10 release mirror.

Adding the mirror

Add only the release snapshot for the tag v2026.10.0

spack mirror add --name v2026.10.0 release-v2026.10.0 s3://spack-binaries/releases/v2026.10/

Add the entire release mirror which will include binaries built by patch releases and as back ports as they are applied.

spack mirror add release-v2026.10 s3://spack-binaries/releases/v2026.10/

Trusting Keys

🔑 Signing Key: 2C8DD3224EF3573A42BD221FA8E0CA3C1C2ADA2F

spack buildcache keys --install --trust release-v2026.10.0

Spack version compatibility

This release continues to use the v2.2 Package API. This is the Package API
version used by the Spack v1.0.0 release. Any Spack version 1.0.0 or newer
is compatible with this release of the packages repo.

This release was tested against Spack v1.2.0 (63943396d634faa92cb59474df3558ec9b9b2425)
and the environments used to generate the binary caches use new features
that will be part of the Spack 1.2 release. The binary caches themselves are
compatible with any Spack v1.0.0 or newer (any Spack that supports the v3
URL build cache layout), but the environments used to generate them
cannot be reconcretized with any existing Spack release, and require the
develop branch.

See the Package API
Documentation
for full details on package versioning and compatibility.

Package statistics

There are now 9095 packages in the spack-packages builtin repo. This
is up from 8752 in the previous release.

New and removed packages

This release contains a number of deprecations to address CVEs in a number
of projects.

In addition to new deprecations, all package versions deprecated prior to
the v2026.06 release have been removed with a few exceptions.

New packages

• -4c-multiphysics
• arcane-framework
• ast-grep
• bali-phy
• bun
• calculix
• calculix-adapter
• cccl
• coolprop
• copacabana
• csh
• darma-magistrate
• darma-vt
• eventanalysis
• exacmech
• fastloess-cpp
• fastlowess-cpp
• github-copilot
• gmgpolar
• gyselalibxx
• kind
• kratos-multiphysics
• krona
• libcomm
• libfci
• libri
• libvncserver
• libwignernj
• libxs
• lielab
• linbox
• lo2s
• macaulay2
• maxbin
• meshioplusplus
• metal-cpp
• mfem-mgis
• miniprot
• mlx
• mp-units
• ms-gsl
• multichase
• noahmp
• nvbench
• nvidia-libmathdx
• opam-num
• opam-ocamlbuild
• opam-ocamlfind
• opencode
• openms
• perl-file-copy-recursive-reduced
• perl-findbin-libs
• perl-statistics-r
• perl-statistics-regression
• pi
• polyclipper
• polytope
• portaudio
• proteus
• py-acpype
• py-albumentationsx
• py-ale-py
• py-annotated-doc
• py-anthropic
• py-array-api-compat
• py-arviz-base
• py-arviz-plots
• py-arviz-stats
• py-atb
• py-cgsmiles
• py-compressed-tensors
• py-ctypes-dlpack
• py-cylc-uiserver
• py-deisa-ray
• py-depyf
• py-dirscape
• py-docplex
• py-dotmatch
• py-dram-bio
• py-farama-notifications
• py-formulae
• py-fortdepend
• py-grpcio-reflection
• py-gvec
• py-gymnasium
• py-hatch-docstring-description
• py-hddm-wfpt
• py-httpx-aiohttp
• py-httpx-sse
• py-ijson
• py-interegular
• py-iops-benchmark
• py-jupyter-builder
• py-kraken-biom
• py-legacy-api-wrap
• py-llguidance
• py-lm-format-enforcer
• py-mcp
• py-melissa-online
• py-meshioplusplus
• py-nest-asyncio2
• py-nir
• py-nodetop
• py-numkong
• py-openai-harmony
• py-outlines-core
• py-partial-json-parser
• py-pcpp
• py-pre-commit-hooks
• py-pybase64
• py-pycountry
• py-pygame-ce
• py-pykdtree
• py-pylibjpeg
• py-pymatgen-core
• py-pymc
• py-pyresample
• py-pyside6
• py-pytensor
• py-pytest-lazy-fixtures
• py-pyvers
• py-pyyaml-ft
• py-qiskit
• py-rapidu
• py-restrictedpython
• py-scikit-bio
• py-scmver
• py-session-info2
• py-slurmate
• py-slurmpast
• py-slurmwatch
• py-sounddevice
• py-sphinx-autoapi
• py-sphinx-last-updated-by-git
• py-sphinx-sitemap
• py-sphinxcontrib-svg2pdfconverter
• py-sse-starlette
• py-stable-baselines3
• py-stim
• py-tensordict
• py-treescope
• py-types-protobuf
• py-types-rasterio
• py-warp-lang
• py-xarray-einstats
• qt-3d
• qt-websockets
• r-apex
• r-collections
• r-duckdb
• r-gage
• r-languageserver
• r-lintr
• r-made4
• r-org-dr-eg-db
• r-org-mm-eg-db
• r-rslurm
• r-rwiener
• r-s4arrays
• r-sankeyd3
• r-seqinfo
• r-sparsearray
• r-swath2stats
• r-ucsc-utils
• r-xmlparsedata
• rapidxml
• rocprof-trace-decoder
• sniper
• snls
• spooles
• spy
• tdls
• timg
• tpp
• triton
• truchas-pbf
• xad