hermes - 💡(How to fix) Fix pyproject.toml exclude-newer breaks pip install with PyPI mirrors that lack upload dates [3 comments, 2 participants]

Bug Description

When using a PyPI mirror (e.g., Aliyun mirrors.aliyun.com/pypi/simple) that does not serve upload dates in its simple index, uv pip install with exclude-newer = "7 days" in pyproject.toml filters out ALL packages — making installation impossible.

Steps to Reproduce

1. Configure uv to use a mirror without upload dates:

   # ~/.config/uv/uv.toml
   [pip]
   index-url = "https://mirrors.aliyun.com/pypi/simple"

2. Run cd ~/.hermes/hermes-agent && uv pip install -e '.[all]'
3. Observe resolver errors for packages like pydantic and pydantic-core — all versions are rejected as "too new"

Root Cause

pyproject.toml (around line 176): exclude-newer = "7 days"

When the mirror simple index has no upload dates, uv assigns a cutoff date to ALL packages, so every version appears "too new" → zero candidates. The packages DO exist on the mirror (verifiable via pip index versions).

Fix

Change pyproject.toml:

[tool.uv]
exclude-newer = "off"

This setting is meaningful on the official PyPI (where upload dates exist), but on mirrors without date metadata it blocks all installs. Setting it to "off" restores compatibility.

Workaround

Users can remove exclude-newer from pyproject.toml manually, or use:

uv pip install -e '.[all]' --exclude-newer never

Environment

• Hermes Agent git-installed
• uv with Aliyun PyPI mirror
• Any mirror that strips upload-time from its simple index