[dependabot]

Bumps virtualenv from 21.14.11 to 21.15.5.

Release notes

Sourced from virtualenv's releases.

21.15.5

🐍 PyPI release

📜 Full Changelog

21.15.4

Bug fixes

• Upgrade embedded wheels: pip to 26.3 from 26.2.2 (#3508) by @​gaborbernat.

🐍 PyPI release

📜 Full Changelog

21.15.3

Bug fixes

• Add the environment's lib/pkgconfig to PKG_CONFIG_PATH when activating from xonsh, and restore the previous value or unset it again on deactivate, as the other activators already do (#3505) by @​darrenhuai and @​gaborbernat.
• Read virtualenv.ini values without interpolation, as environment variables and command line flags already are. A value holding a %, such as prompt = 50% done, was ignored without any message. %% and %(name)s are now kept as written, so write a single % (#3501) by @​darrenhuai and @​gaborbernat.
• Reject a destination that already exists but is not a directory, such as /dev/null, a FIFO or a socket, or that sits inside one, with a usage error instead of a NotADirectoryError once creation has started. A regular file now gets the same is not a directory message instead of is a file (#3504) by @​darrenhuai and @​gaborbernat.
• Set TCL_LIBRARY and TK_LIBRARY to the interpreter's Tcl/Tk paths in activate.nu, as the other activators do. Nushell activation used to leave both variables as they were (#3502) by @​darrenhuai and @​gaborbernat.
• Show the environment name in the zsh prompt when KSH_ARRAYS is set at activation. Since 21.14.13 the prompt read an empty psvar entry under that option and showed () instead of the name (#3506) by @​PDGGK and @​gaborbernat.
• Treat an empty or blank VIRTUALENV_OVERRIDE_APP_DATA and an empty VIRTUALENV_CONFIG_FILE as unset, as virtualenv already does for its option variables. An empty app-data override, or on Windows one made of spaces, made the current directory the cache, so --reset-app-data deleted it, and an empty config file path logged an error on every run (#3503) by @​darrenhuai and @​gaborbernat.

New Contributors

• @​duriantaco made their first contribution in pypa/virtualenv#3500
• @​PDGGK made their first contribution in pypa/virtualenv#3506

🐍 PyPI release

📜 Full Changelog

21.15.2

Bug fixes

• Build the default application data folder only when no folder was given through --app-data, VIRTUALENV_APP_DATA or the configuration file, so --read-only-app-data with an explicit folder works when the default folder is missing, and writable runs stop creating an unused one. Folders from VIRTUALENV_APP_DATA and the configuration file now get the same checks as --app-data (#3488) by @​darrenhuai and @​gaborbernat.
• Build the seed wheel image in a staging folder and move it into place only once it is complete, so an extraction that fails part way, for example on a full disk, after a killed process or on a path over the Windows length limit, no longer leaves a partial image that later runs seed as a pip without METADATA, RECORD or INSTALLER (#3487) by @​darrenhuai and @​gaborbernat.
• Make -p/--python and --try-first-with replace the interpreters set by VIRTUALENV_PYTHON, VIRTUALENV_TRY_FIRST_WITH or the configuration file instead of being merged with them, so the configured interpreter no longer wins over the one asked for and a -p that finds nothing fails instead of falling back to it. Try several VIRTUALENV_PYTHON values in the order given rather than starting with the second (#3494) by @​darrenhuai and @​gaborbernat.
• On Windows, re-create an environment in place when its copied interpreter files, such as python.exe, or its seeded packages are read-only, instead of failing with PermissionError (#3492) by @​darrenhuai and @​gaborbernat.
• Reject an empty or whitespace-only destination. An empty one, and on Windows one made only of spaces, resolved to the current directory, so an unset VENV in virtualenv --clear "$VENV" deleted the working directory. Pass . to create the environment in the current directory (#3491) by @​darrenhuai and @​gaborbernat.
• Restore the default prompt in deactivate.bat when PROMPT was undefined at activation, instead of leaving the environment name in front of it (#3489) by @​darrenhuai.
• Undefine PATH again in deactivate.bat when it was undefined at activation, instead of leaving the environment's Scripts folder on it, and stop a second activate.bat from adding that folder twice (#3493) by @​darrenhuai and @​gaborbernat.

... (truncated)

Changelog

Sourced from virtualenv's changelog.

################# Release History #################

.. towncrier-draft-entries:: [UNRELEASED DRAFT]

.. towncrier release notes start

.. _release-21-15-6:

---

21.15.6 (2026-11-06)

---

.. _release-21-15-6-fixed:

Fixed

• Clear inherited PYTHONHOME during PowerShell, Nushell, and programmatic activation so child interpreters use the environment's standard library. Preserve empty values when Bash and fish deactivate (:pr:3517) by :user:gaborbernat.
• Remove empty PATH entries during programmatic activation, including entries in an otherwise nonempty value. On POSIX, an empty entry searches the current directory (:pr:3513) by :user:qodelicious and :user:gaborbernat.
• Unset PYTHONHOME during C shell activation and restore its original value on deactivation. An inherited value could previously prevent the environment's Python interpreter from starting (:pr:3514) by :user:abhishekcpp007 and :user:gaborbernat.

.. _release-21-15-5:

---

21.15.5 (2026-11-04)

---

.. _release-21-15-4:

---

21.15.4 (2026-11-04)

---

.. _release-21-15-4-fixed:

Fixed

• Upgrade embedded wheels: pip to 26.3 from 26.2.2 (:pr:3508) by :user:gaborbernat.

.. _release-21-15-3:

---

... (truncated)

Commits

• 9d8386c release 21.15.5
• 9e5d0fd 👷 ci: adopt shared upgrade PR, CodeQL and release notes (#3510)
• 4d9ec5c release 21.15.4
• 1c88eb9 🐛 fix(upgrade): emit prose changelog fragment (#3509)
• 84a0f4e Upgrade embedded pip/setuptools/wheel and CI test tools (#3508)
• bb6ad72 build(deps): refresh release tool lock (#3507)
• 12741f6 release 21.15.3
• c28879e 🐛 fix(xonsh): prepend lib/pkgconfig to PKG_CONFIG_PATH (#3505)
• 6d790dc 🐛 fix(bash): show the zsh prompt name under KSH_ARRAYS (#3506)
• 586c6a2 🐛 fix(create): reject a destination that is not a directory (#3504)
• Additional commits viewable in compare view