Error updating build-system dependencies with uv #12124
Description
Is there an existing issue for this?
- I have searched the existing issues
Package ecosystem
uv
Package manager version
uv 0.6.14
Language version
Python 3.13.3
Manifest location and content before the Dependabot update
No response
dependabot.yml content
version: 2
updates:
- package-ecosystem: "uv"
directory: "/"
schedule:
interval: "weekly"
Updated dependency
setuptools from 77.0.1 to 79.0.0
What you expected to see, versus what you actually saw
Expected pyproject.toml to be updated with the new version.
Saw the following logs:
(trimmed for brevity)
INFO Checking if setuptools 77.0.1 needs updating
...
INFO Updating setuptools from 77.0.1 to 79.0.0
...
INFO Running command: pyenv exec uv lock --upgrade-package setuptools
...
ERROR Error processing setuptools (RuntimeError)
ERROR Expected lockfile to change!
...
Dependabot encountered '1' error(s) during execution, please check the logs for more details.
+--------------------------------------------+
| Dependencies failed to update |
+------------+---------------+---------------+
| Dependency | Error Type | Error Details |
+------------+---------------+---------------+
| setuptools | unknown_error | null |
+------------+---------------+---------------+
It seems like it tries to update the lockfile, but since the build-system dependency is not tracked there, it sees no changes to the lock file and errors out.
Native package manager behavior
No response
Images of the diff or a link to the PR, issue, or logs
No response
Smallest manifest that reproduces the issue
A project consisting on the following reproduces the error for me:
pyproject.toml:
name = "dependabot-uv-issue-reproduction"
version = "0.1.0"
requires-python = ">=3.13"
dependencies = []
[build-system]
requires = ["setuptools==77.0.1"]
build-backend = "setuptools.build_meta"
.github/dependabot.yml:
version: 2
updates:
- package-ecosystem: "uv"
directory: "/"
schedule:
interval: "weekly"
uv.lock:
version = 1
revision = 1
requires-python = ">=3.13"
[[package]]
name = "dependabot-uv-issue-reproduction"
version = "0.1.0"
source = { editable = "." }