Package
ComfyUI
When did the issue occur?
Other
What GPU / hardware type are you using?
NVIDIA RTX 3080 Ti Laptop and AMD RX 7900 XTX
What happened?
I am using CachyOS (Arch-based) on two separate systems and neither of them can install extensions through either the built-in manager or the ComfyUI Manager.
Both systems have recently had the OS installed. Configuration and data folders for StabilityMatrix are new.
Attempting to install an extension always results in:
[!] error: File not found: `venv/uv-build-constraints.txt`
The file does exist in the what I believe is the expected directory, being /home/joel/StabilityMatrix/Packages/ComfyUI/venv/ in this case.
This issue persists across multiple versions of StabilityMatrix (I have checked v2.15.6, v2.15.7, and v2.15.8) and ComfyUI (including releases v0.20.1 through to v0.22.0 that I have been using over the past few weeks).
I do not recall all the exact versions of Python I have used, but this definitely presents itself on Python 3.12.2 and Python 3.10.19.
This error did not occur on Windows 11.
Creating a virtual Python environment and cloning ComfyUI does not result in any apparent issues that impact usage.
Console output
setup plugin alembic.autogenerate.schemas
setup plugin alembic.autogenerate.tables
setup plugin alembic.autogenerate.types
setup plugin alembic.autogenerate.constraints
setup plugin alembic.autogenerate.defaults
setup plugin alembic.autogenerate.comments
Adding extra search path checkpoints /home/joel/StabilityMatrix/Models/StableDiffusion
Adding extra search path diffusers /home/joel/StabilityMatrix/Models/Diffusers
Adding extra search path loras /home/joel/StabilityMatrix/Models/Lora
Adding extra search path loras /home/joel/StabilityMatrix/Models/LyCORIS
Adding extra search path clip /home/joel/StabilityMatrix/Models/TextEncoders
Adding extra search path clip_vision /home/joel/StabilityMatrix/Models/ClipVision
Adding extra search path embeddings /home/joel/StabilityMatrix/Models/Embeddings
Adding extra search path vae /home/joel/StabilityMatrix/Models/VAE
Adding extra search path vae_approx /home/joel/StabilityMatrix/Models/ApproxVAE
Adding extra search path controlnet /home/joel/StabilityMatrix/Models/ControlNet
Adding extra search path controlnet /home/joel/StabilityMatrix/Models/T2IAdapter
Adding extra search path gligen /home/joel/StabilityMatrix/Models/GLIGEN
Adding extra search path upscale_models /home/joel/StabilityMatrix/Models/ESRGAN
Adding extra search path upscale_models /home/joel/StabilityMatrix/Models/RealESRGAN
Adding extra search path upscale_models /home/joel/StabilityMatrix/Models/SwinIR
Adding extra search path hypernetworks /home/joel/StabilityMatrix/Models/Hypernetwork
Adding extra search path ipadapter /home/joel/StabilityMatrix/Models/IpAdapter
Adding extra search path ipadapter /home/joel/StabilityMatrix/Models/IpAdapters15
Adding extra search path ipadapter /home/joel/StabilityMatrix/Models/IpAdaptersXl
Adding extra search path prompt_expansion /home/joel/StabilityMatrix/Models/PromptExpansion
Adding extra search path ultralytics /home/joel/StabilityMatrix/Models/Ultralytics
Adding extra search path ultralytics_bbox /home/joel/StabilityMatrix/Models/Ultralytics/bbox
Adding extra search path ultralytics_segm /home/joel/StabilityMatrix/Models/Ultralytics/segm
Adding extra search path sams /home/joel/StabilityMatrix/Models/Sams
Adding extra search path diffusion_models /home/joel/StabilityMatrix/Models/DiffusionModels
[START] Security scan
[DONE] Security scan
** ComfyUI startup time: 2026-05-21 05:06:21.883
** Platform: Linux
** Python version: 3.12.12 (main, Feb 3 2026, 22:51:04) [Clang 21.1.4 ]
** Python executable: /home/joel/StabilityMatrix/Packages/ComfyUI/venv/bin/python3
** ComfyUI Path: /home/joel/StabilityMatrix/Packages/ComfyUI
** ComfyUI Base Folder Path: /home/joel/StabilityMatrix/Packages/ComfyUI
** User directory: /home/joel/StabilityMatrix/Packages/ComfyUI/user
** ComfyUI-Manager config path: /home/joel/StabilityMatrix/Packages/ComfyUI/user/__manager/config.ini
** Log path: /home/joel/StabilityMatrix/Packages/ComfyUI/user/comfyui.log
[PRE] ComfyUI-Manager
Found comfy_kitchen backend cuda: {'available': True, 'disabled': False, 'unavailable_reason': None, 'capabilities': ['apply_rope', 'apply_rope1', 'dequantize_nvfp4', 'dequantize_per_tensor_fp8', 'quantize_mxfp8', 'quantize_nvfp4', 'quantize_per_tensor_fp8', 'scaled_mm_nvfp4']}
Found comfy_kitchen backend eager: {'available': True, 'disabled': False, 'unavailable_reason': None, 'capabilities': ['apply_rope', 'apply_rope1', 'dequantize_mxfp8', 'dequantize_nvfp4', 'dequantize_per_tensor_fp8', 'quantize_mxfp8', 'quantize_nvfp4', 'quantize_per_tensor_fp8', 'scaled_mm_mxfp8', 'scaled_mm_nvfp4']}
Found comfy_kitchen backend triton: {'available': True, 'disabled': True, 'unavailable_reason': None, 'capabilities': ['apply_rope', 'apply_rope1', 'dequantize_nvfp4', 'dequantize_per_tensor_fp8', 'quantize_mxfp8', 'quantize_nvfp4', 'quantize_per_tensor_fp8']}
Checkpoint files will always be loaded safely.
Total VRAM 15984 MB, total RAM 31744 MB
pytorch version: 2.12.0+cu130
Set vram state to: NORMAL_VRAM
Device: cuda:0 NVIDIA GeForce RTX 3080 Ti Laptop GPU : cudaMallocAsync
Using async weight offloading with 2 streams
Enabled pinned memory 28569.0
Using pytorch attention
aimdo: /project/src-posix/cuda-funchooks.c:52:DEBUG:aimdo_setup_hooks: hooks successfully installed
aimdo: /project/src/control.c:151:INFO:comfy-aimdo inited for GPU: NVIDIA GeForce RTX 3080 Ti Laptop GPU (VRAM: 15984 MB)
DynamicVRAM support detected and enabled
Python version: 3.12.12 (main, Feb 3 2026, 22:51:04) [Clang 21.1.4 ]
ComfyUI version: 0.22.0
comfy-aimdo version: 0.3.0
comfy-kitchen version: 0.2.8
comfyui-frontend-package version: 1.43.18
comfyui-workflow-templates version: 0.9.79
comfyui-embedded-docs version: 0.5.0
comfy-kitchen version: 0.2.8
comfy-aimdo version: 0.3.0
[Prompt Server] web root: /home/joel/StabilityMatrix/Packages/ComfyUI/venv/lib/python3.12/site-packages/comfyui_frontend_package/static
Asset seeder disabled
[START] ComfyUI-Manager
[ComfyUI-Manager] Using GitPython backend
[ComfyUI-Manager] network_mode: public
[ComfyUI-Manager] The matrix sharing feature has been disabled because the `matrix-nio` dependency is not installed.
To use this feature, please run the following command:
/home/joel/StabilityMatrix/Packages/ComfyUI/venv/bin/python3 -m pip install matrix-nio
Import times for custom nodes:
0.0 seconds: /home/joel/StabilityMatrix/Packages/ComfyUI/custom_nodes/websocket_image_save.py
Context impl SQLiteImpl.
Will assume non-transactional DDL.
Context impl SQLiteImpl.
Will assume non-transactional DDL.
Running upgrade -> 0001_assets, Initial assets schema
Revision ID: 0001_assets
Revises: None
Create Date: 2025-12-10 00:00:00
Running upgrade 0001_assets -> 0002_merge_to_asset_references, Merge AssetInfo and AssetCacheState into unified asset_references table.
Running upgrade 0002_merge_to_asset_references -> 0003_add_metadata_job_id, Add system_metadata and job_id columns to asset_references.
Change preview_id FK from assets.id to asset_references.id.
Database upgraded from None to 0003_add_metadata_job_id
Starting server
To see the GUI go to: http://127.0.0.1:8188
[ComfyUI-Manager] Using uv as Python module for pip operations.
Using Python 3.12.12 environment at: venv
100%|██████████| 36.0k/36.0k [00:00<00:00, 7.33MB/s]
Extracted zip file to /home/joel/StabilityMatrix/Packages/ComfyUI/custom_nodes/ComfyUI-GGUF
Install: pip packages
Using Python 3.12.12 environment at: venv
## ComfyUI-Manager: EXECUTE =>
['/home/joel/StabilityMatrix/Packages/ComfyUI/venv/bin/python3', '-m', 'uv',
'pip', 'install', 'gguf>=0.13.0']
[!] error: File not found: `venv/uv-build-constraints.txt`
install script failed: ComfyUI-GGUF
Using Python 3.12.12 environment at: venv
[ComfyUI-Manager] Installation failed:
Failed to execute install script: ComfyUI-GGUF@1.1.10
Using Python 3.12.12 environment at: venv
After restarting ComfyUI, please refresh the browser.
FETCH ComfyRegistry Data [DONE]
[ComfyUI-Manager] default cache updated: https://api.comfy.org/nodes
FETCH DATA from: /home/joel/StabilityMatrix/Packages/ComfyUI/user/__manager/cache/1514988643_custom-node-list.json [DONE]
[ComfyUI-Manager] All startup tasks have been completed.
Version
v2.15.8
What Operating System are you using?
Linux
Package
ComfyUI
When did the issue occur?
Other
What GPU / hardware type are you using?
NVIDIA RTX 3080 Ti Laptop and AMD RX 7900 XTX
What happened?
I am using CachyOS (Arch-based) on two separate systems and neither of them can install extensions through either the built-in manager or the ComfyUI Manager.
Both systems have recently had the OS installed. Configuration and data folders for StabilityMatrix are new.
Attempting to install an extension always results in:
The file does exist in the what I believe is the expected directory, being
/home/joel/StabilityMatrix/Packages/ComfyUI/venv/in this case.This issue persists across multiple versions of StabilityMatrix (I have checked v2.15.6, v2.15.7, and v2.15.8) and ComfyUI (including releases v0.20.1 through to v0.22.0 that I have been using over the past few weeks).
I do not recall all the exact versions of Python I have used, but this definitely presents itself on
Python 3.12.2andPython 3.10.19.This error did not occur on Windows 11.
Creating a virtual Python environment and cloning ComfyUI does not result in any apparent issues that impact usage.
Console output
Version
v2.15.8
What Operating System are you using?
Linux