Adira 62c99c10b3 fix(diffusers): pin diffusers and transformers to a known-good pair (#9979) (#10442) ...

fix(diffusers): pin diffusers and transformers to a known-good pair

The diffusers backend tracked git+https://github.com/huggingface/diffusers
(main) with an unpinned transformers. transformers v5 restructured
CLIPTextModel and removed the .text_model attribute that diffusers' single
-file loader reads, so loading any single-file Stable Diffusion checkpoint
fails:

    create_diffusers_clip_model_from_ldm (single_file_utils.py)
    position_embedding_dim = model.text_model.embeddings.position_embedding...
    AttributeError: 'CLIPTextModel' object has no attribute 'text_model'

No released diffusers (<=0.38.0) supports transformers v5 - only unreleased
diffusers main does. Because the requirements tracked main plus an unpinned
transformers, every backend image froze whichever pair existed at build
time, and images built once transformers v5 shipped but before diffusers
main caught up are permanently broken.

Pin the last known-good released pair across all requirements files:
diffusers==0.38.0 and transformers==4.57.6. 0.38.0 still exposes every
pipeline backend.py imports (Flux, Wan, Sana, LTX2, Qwen, GGUF), so no
functionality is lost, and builds become reproducible instead of drifting
into the broken window.

Fixes #9979

Assisted-by: Claude:claude-opus-4-8 [Claude Code]

Signed-off-by: Adira Denis Muhando <dennisadira@gmail.com>

2026-06-22 12:38:06 +02:00

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