Tools and environments changedclaude-science/tools-and-environments
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Upstream edited this page at 29 Sep 2026 14:30 UTC, give or take a minute or two: the time comes from Anthropic’s own sitemap rather than from a commit. This site recorded the change at 29 Sep 2026 14:37 UTC.
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2323* Python: pip from PyPI
2424* R: CRAN and Bioconductor
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26To have conda and pip download packages from an internal mirror instead, see [Point package installs at an internal mirror](/docs/claude-science/corporate-networks#point-package-installs-at-an-internal-mirror).
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2628A package installed into an environment is permanent and available in every session and project using that environment. A package installed inline in a code cell (`pip install` or `install.packages()`) lasts only until the kernel restarts. To keep a package, ask Claude to install it into the environment.
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2830For tools without a package, Claude downloads source, builds it in the sandbox with compilers from conda-forge, and saves the build as an artifact for reuse.
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30The sandbox has no root access or system package manager. `apt` and `sudo` aren't available; Claude uses conda-forge or builds from source instead. Package sources can't be redirected to a different server.
32The sandbox has no root access or system package manager. `apt` and `sudo` aren't available; Claude uses conda-forge or builds from source instead.
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3234## GPUs
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