🐛 fix(lock): use bundled uv binary for uv sync#292
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gaborbernat merged 1 commit intotox-dev:mainfrom Feb 23, 2026
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When a system-installed uv is older than the project's `tool.uv.required-version`, `uv sync` fails because the lock runner was invoking a bare `"uv"` string resolved via PATH rather than the bundled binary from `find_uv_bin()`. All other commands (`uv venv`, `uv pip install`, `uv pip freeze`) already use `self.uv` which returns the bundled path. Aligning `uv sync` to do the same ensures version consistency. Fixes tox-dev#239
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When a project sets
tool.uv.required-versioninpyproject.tomland the system-installed uv is older than that constraint,uv syncin the lock runner fails withRequired uv version does not match the running version. 🐛 This happens because the lock runner invokes a bare"uv"string that gets resolved via PATH to the system binary, while all other commands (uv venv,uv pip install,uv pip freeze) already useself.uvwhich resolves to the bundled binary fromfind_uv_bin().The fix aligns
uv syncwith every other uv invocation by usingself.uvinstead of a hardcoded string. This ensures the bundled uv version (which tox-uv pins as a dependency) is always used, avoiding version mismatches withrequired-versionconstraints.No behavioral change for users whose system uv matches or exceeds the bundled version. Users who previously hit this error no longer need to manually update their system uv.
Fixes #239