# pdm-backend
> The build backend used by PDM that supports latest packaging standards
- **URL**: https://www.freshcrate.ai/projects/pdm-backend
- **Author**: pypi
- **Category**: Frameworks
- **Latest version**: `2.4.9` (2026-06-05)
- **License**: Unknown
- **Source**: https://github.com/pdm-project/pdm-backend
- **Homepage**: https://pypi.org/project/pdm-backend/
- **Language**: Python
- **GitHub**: 84 stars, 46 forks
- **Registry**: pypi (`pdm-backend`)
- **Tags**: `517`, `build`, `packaging`, `pep`, `pypi`
## Description
# PDM-Backend
The build backend used by [PDM] that supports latest packaging standards.
[](https://pypi.org/project/pdm-backend)
[](https://github.com/pdm-project/pdm-backend/actions/workflows/ci.yml)
[](https://results.pre-commit.ci/latest/github/pdm-project/pdm-backend/main)
[](https://pdm-project.org)
This is the backend for [PDM] projects that is fully-compatible with [PEP 517] spec, but you can also use it alone.
It reads the metadata of [PEP 621] format and coverts it to [Core metadata].
[pep 517]: https://www.python.org/dev/peps/pep-0517/
[pep 621]: https://www.python.org/dev/peps/pep-0621/
[Core metadata]: https://packaging.python.org/specifications/core-metadata/
[PDM]: https://pdm-project.org
## Links
- [Documentation](https://backend.pdm-project.org)
- [Changelog](https://github.com/pdm-project/pdm-backend/releases)
- [PDM Documentation][PDM]
- [PyPI](https://pypi.org/project/pdm-backend)
- [Discord](https://discord.gg/Phn8smztpv)
> **NOTE**
> This project has been renamed from `pdm-pep517` and the old project lives in the [legacy] branch.
[legacy]: https://github.com/pdm-project/pdm-backend/tree/legacy
## Sponsors
## License
This project is licensed under [MIT license](/LICENSE).
## Recent releases
| Version | Date | Urgency | Changes |
| --- | --- | --- | --- |
| `2.4.9` | 2026-06-05 | High | *No significant changes* ##### [View changes on GitHub](https://github.com/pdm-project/pdm-backend/compare/2.4.8...2.4.9) |
| `2.4.8` | 2026-04-21 | Low | Imported from PyPI (2.4.8) |
| `2.4.7` | 2026-01-29 | Low | ### 🚀 Features - Allow user to override wheel with multiple plat tags - by @trim21 in https://github.com/pdm-project/pdm-backend/issues/298 [(263a5)](https://github.com/pdm-project/pdm-backend/commit/263a598) ### 💻 Chores - Switch dev-dependencies to dependency-groups - by @frostming [(9572d)](https://github.com/pdm-project/pdm-backend/commit/9572dc4) ##### [View changes on GitHub] |
| `2.4.6` | 2025-11-11 | Low | ### 🐞 Bug Fixes - Env for calling Python applications - by @paugier and @frostming in https://github.com/pdm-project/pdm-backend/issues/295 [(743fd)](https://github.com/pdm-project/pdm-backend/commit/743fd55) - No warning emitting in case of SCM error when fallback_version is used. Fixes #293 - by @frostming in https://github.com/pdm-project/pdm-backend/issues/293 [(e7dbb)](https://github.com/pdm-project/pdm-backend/commit/e7d |
| `2.4.5` | 2025-07-03 | Low | ### 🐞 Bug Fixes - Override Git config core.abbrev when reading version from SCM - by @ziyao233 in https://github.com/pdm-project/pdm-backend/issues/286 [(60d94)](https://github.com/pdm-project/pdm-backend/commit/60d94c8) - Support a SOURCE_DATE_EPOCH prior to 1980 - by @branchvincent in https://github.com/pdm-project/pdm-backend/issues/288 [(daf1e)](https://github.com/pdm-project/pdm-backend/commit/daf1e07) ##### |
| `2.4.4` | 2025-04-07 | Low | ### 🚀 Features - Improve diagnostic caused by git incorrectly parsing paths on MSYS2. - by @cr1901 in https://github.com/pdm-project/pdm-backend/issues/267 [(23807)](https://github.com/pdm-project/pdm-backend/commit/23807de) - Out-of-box stubs package support - by @trim21 in https://github.com/pdm-project/pdm-backend/issues/280 [(9a988)](https://github.com/pdm-project/pdm-backend/commit/9a9884a) ### 📝 Docum |
| `2.4.3` | 2024-10-23 | Low | ### 💻 Chores - Bump validate-pyproject to 0.9.0 - by @henryiii in https://github.com/pdm-project/pdm-backend/issues/265 [(23484)](https://github.com/pdm-project/pdm-backend/commit/2348482) - Update dependencies - by @frostming [(7f7dd)](https://github.com/pdm-project/pdm-backend/commit/7f7dd51) - Update badge - by @frostming [(6fdd4)](https://github.com/pdm-project/pdm-backend/commit/6fdd494) - Migrate |
| `2.4.2` | 2024-10-10 | Low | ### 🚀 Features - Use fallback_version for source = "call" - by @frostming in https://github.com/pdm-project/pdm-backend/issues/264 [(16562)](https://github.com/pdm-project/pdm-backend/commit/1656230) ### 🐞 Bug Fixes - Update to pyproject_metadata 0.9.0b5 - by @henryiii in https://github.com/pdm-project/pdm-backend/issues/263 [(67fb7)](https://github.com/pdm-project/pdm-backend/commit/67fb709) ##### |
| `2.4.1` | 2024-09-21 | Low | ### 🐞 Bug Fixes - Can't format requirements when converting to setup.py - by @frostming [(856d8)](https://github.com/pdm-project/pdm-backend/commit/856d849) - Update to pyproject_metadata 0.9.0b4 - by @frostming [(88c3f)](https://github.com/pdm-project/pdm-backend/commit/88c3f44) ##### [View changes on GitHub](https://github.com/pdm-project/pdm-backend/compare/2.4.0...2.4.1) |
| `2.4.0` | 2024-09-20 | Low | ### 🚀 Features - Accept context as the second argument to version_format function - by @frostming in https://github.com/pdm-project/pdm-backend/issues/258 [(708aa)](https://github.com/pdm-project/pdm-backend/commit/708aa3f) - Update pyproject-metadata to support latest version of PEP 639 - by @frostming in https://github.com/pdm-project/pdm-backend/issues/259 [(6c48d)](https://github.com/pdm-project/pdm-backend/commit/6c48d72) |
## Citation
- HTML: https://www.freshcrate.ai/projects/pdm-backend
- Markdown: https://www.freshcrate.ai/projects/pdm-backend.md
- Dependencies JSON: https://www.freshcrate.ai/api/projects/pdm-backend/deps
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