[Proteina-Complexa] Fresh UV env installs a torchaudio incompatible with torch → import crash

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#42 opened on Jun 15, 2026 0 comments 0 reactions 0 assignees View on GitHub

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Assessment

Difficulty: 1/5
Estimated time: Under an hour
Newbie friendliness: 88/100

Issue type: Bug
Clarity: Clearly specified
Activity status: Quiet
Tech stack: python, pytorch
Domain: build-system

Research direction

Start in build_uv_env.sh and reproduce the fresh UV environment setup described in the issue. Pin torchaudio to 2.7.0, then verify that complexa download or a torch/torchaudio import no longer raises the undefined-symbol error.

Written by the indexing model from the issue text.

Description

A fresh .venv built from build_uv_env.sh installs torchaudio 2.11.0 against torch 2.7.0. The ABI mismatch throws OSError: undefined symbol: torch_library_impl on first import, which crashes the very first complexa download.

Severity: High · Status: workaround verified; upstream open

Steps to reproduce

Build the UV env from scratch (build_uv_env.sh).
Run complexa download (or anything importing torch/torchaudio).
→ OSError: undefined symbol: torch_library_impl.

Fix

Pin a compatible torchaudio:

uv pip install --torch-backend=cu126 --reinstall-package torchaudio "torchaudio==2.7.0"

build_uv_env.sh should pin torchaudio==2.7.0.

Environment

NVIDIA A100 80GB PCIe · driver 565.57.01 · CUDA 12.7
Repo: branch dev @ 916eaae
Runtime: UV (.venv + env.sh)

Dominant language: Python
Stars: 432
Forks: 78
Avg merge: 10d 46m
Merged PRs (30d): 1

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