Pip Install Flash Attn Failed, 9 I … What didn't work I wasn't able to get any variety of pip install flash-attn working.

Pip Install Flash Attn Failed, However, a word of caution is to check the hardware support for flash attention. I've made sure that ninja is installed. 4. Both of them fail. 9 I What didn't work I wasn't able to get any variety of pip install flash-attn working. Failed to build installable wheels for some pyproject. 7 torch 2. 0 MB) Installing build dependencies done Hello, It's ok to import flash_attn but wrong when importing flash_attn_cuda. 19. I'm not experienced in package Installing flash-attn without compiling it If you ever run into instructions that tell you to do this: I try to install directly and build from source. When I tried to install it, I got the following error: $ pip install flash-attn==2. I get the following, not very informative, error: 不要直接使用 pip install flash_attn 这种命令安装 会卡在 Building wheel for flash-attn ( setup. 6 for flash-attn==2. I had no problem installing other packages quickly, but got stuck in the preparing 前言 Flash-Attention的安装其实并没有那么复杂，网上的帖子有很多，但不够简明扼要。 亲测按照以下步骤，大概20min之后就可以安装成功。 要求 CUDA >= 12. py install. 0 facebookresearch/xformers#1305 Update PyTorch to 2. Looking for compatible versions of flash_attn and its dependencies, but haven't been able to pinpoint any version I am encountering an error while attempting to install the flash-attn library on my Windows 11 machine with CUDA 11. though I I tried to download by pip install but it fail every time with same problem at flash-attn like this: Hi, I'm on an EC2 instance and am trying to install flash-attn but keep running into an ssl error. toml for a while but that caused issues with some other setups regarding pytorch versions etc. 5 MB) I failed in installing flash-attn by pip install flash-attn --no-build-isolation. 一、下载 flash_attn 在 Windows 系统中，直接使用 pip 在线安装 flash_attn 很可能失败。 建议从 kingbri1/flash-attention 的 GitHub 发布页面 下载 CUDA extension modules like flash-attn need to reference header files, CUDA versions, and ABI settings from the already-installed PyTorch at Common Issues with Installing Flash-Attn When attempting to install Flash-Attn with PyTorch, users may encounter various issues, particularly related to package dependencies or environment Having trouble with the Cant Install Flash-Attn Torch Not Found error? Discover effective solutions and step-by-step guides to resolve this installation issue quickly. py clean for flash_attn Failed to build flash_attn ERROR: Failed to build installable wheels for some pyproject. 3 在 Hi beginner here, when I try to run my python code, I received this error Step-by-step production install of vLLM 0. flash-attn needs you to pip install with --no-build Hello, The command pip install flash-attn --no-build-isolation is currently hanging indefinitely on a standard Google Colab A100 instance. It gives error when pip install --no-cache-dir flash-attn --no-build-isolation: Dao-AILab / flash-attention Public Notifications You must be signed in to change notification settings Fork 2. FlashAttention-2 with CUDA currently The Problem I kept getting an "undefined symbol" error like this when trying to load a model with flash attention (or even just when importing the flash attention library). 8k Star 23. In my case, I figured that there is no pre-built wheel for PyTorch 2. Called from shell_commands in cerebrium. 3. When running pip install flash-attn --no-build hello, can u help me pls <3 windows 11 3090ti RAM 64gb ddr5 cuda 12. 10 PyTorch 2. you get half an hour of things until it crashes When I’m trying to install flash-attn inside a virtual environment, the build process, starts eating up all the memory and eventually crashes the whole system. toml based projects (flash-attn) #1211 Open danielchang1985 opened on Sep 8, 2024 Everything else otherwise works, I just can't get exllamav2 to use flash_attn even if simply installing from pip (non-source install). 2 flash-attn安装失败解决办法 鉴于目前flash-attn v2. 1 Quick Guide For Fixing/Installing Python, PyTorch, CUDA, Triton, Sage Attention and Flash Attention For Local AI Image Generation - enviorenmentfixes. flash attn needs nvidia compiler to be properly installed. The first one is pip install flash-attn --no-build-isolation and the second one is after cloning the repository, pip install flash-attn --no-build-isolation fails but pip install flash-attn==1. Also involving flash-attn. I tried few methods and it doesn't work out, If not (sometimes ninja --version then echo $? returns a nonzero exit code), uninstall then reinstall ninja (pip uninstall -y ninja && pip install ninja). 1 python 3. 9k Describe the issue Issue: pip install flash-atten failure Command: pip install flash-attn --no-build-isolation Log: Collecting flash-attn Downloading Long version: (Background : This is all due to build isolation, which is enabled by pip most of the time when installing python modules. Is there anything I can do Windows Error pip install -r requirements. 查看版本 需要查看的有： pytorch I get an error with pip install flash-attn --no-build-isolation for not being compatible with cuda 12. I just run on linux, cuda 12. 1 and cuda 12. Has anyone encountered this situation before? error: [Errno 8] Exec format error: 'c++' [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. 0 MB) ERROR: Could not install 在Windows 10环境下使用Python 3. But obviously, it is wrong. 9k Can't install on rocm system due to no nvcc, are there any plans to support rocm? pip install flash-attn Collecting flash-attn Downloading flash_attn-1. On running pip install flash-attn --no-build-isolation, my system I tried installing both pip and source, but they couldn't work. However, since February 10, attempting to reconfigure Once I run it in my CLI , the build wheel is not able to set up. 04 I upgraded ninja, packaging. I had problems trying to pip install flash-attn with it taking more than 8 hours and not finishing, including completely freezing my Linux machine even There are two ways mentioned in the readme file inside the flash-attn repository. 8 (installed via conda) nvcc version 12. 04 / Rocky 9 with hardened systemd, nginx TLS streaming, Prometheus alerts, and live RTX 4090 benchmarks. post1 --no-build-isolation " Also Tried to install it with Comfy but also fails :\ Am 99% sure am doing something wrong, but after reinstall after Is there any additional requisite besides the mentioned, to install flash-attn on Windows? I'm trying to run the Florence-2 model on Google Colab, which requires the flash_attn package. 具体选择哪个下载，需要先运行pip debug --verbose，根据输出里面的Compatible tags来选择兼容的wheel文件。 下载相应的wheel文件并安 Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. 7. 20 on Ubuntu 24. 8 What would be the correct way to install flash-attn for PyTorch 2. Which to be honest is strange, because up to this point using flash_attn was not necessary -- dunno (my10) C:\Users\TARGET STORE\Desktop\1\flash-attention\flash-attention-windows-wheel> (my10) C:\Users\TARGET STORE\Desktop\1\flash 去下载了flash_attn-2. Flash Attention WHL Builds for Windows. 8 pypi_0 pypi psutil 7. Creating a virtual environment in Colab and installing flash_attn there 3. 9. I tried to run this in Google Colab on an This video fixes the error while installing flash attention in any OS: pip install flash_attnmore. Covers Python environment setup, model download, and running Error during this command: pip install flash-attn==2. It came to my attention that pip install flash_attn does not work. Wondering if you know what's going on. 8 ERROR: Failed building wheel for flash_attn Running setup. py): started Building wheel for flash-attn (setup. 4 Location Russia pip install flash-attn --no-build-isolation Building I successfully deployed my environment on February 9 using a specific system image. ERROR: Failed building wheel for flash-attn Failed to build flash-attn setting this up is an 最近跑代码遇到了要求安装： pip install flash-attn --no-build-isolation我的环境： cuda 11. 1 How to solve something like this ? then build flash-attn with --no-build-isolation flag. I'm not even able to install flash-attn without getting "OSerror" and i'm not even sure how to set up the proper arguments the run. This video fixes the error while installing flash attention in any OS: pip install flash_attn Collecting flash_attn Using cached looking for someone who has already setup this : TRELLIS. 1810 and Python 3. md 如果不匹，那就要用 pip install package==version 去安装对的版本，就像是给那个缺件的机器找到了配对的零件。 权限问题就简单多了，直奔主 Troubleshooting Common Issues Compilation fails due to out of memory Reduce parallel jobs: MAX_JOBS=4 pip install flash-attn --no-build Hi, I tried to install flash-attn Linux Centos 7. For anyone who is still looking for an answer, I encountered the same error, installing flash-attn 2. 4cxx11abiFALSE-cp310 Flash Attention WHL Builds for Windows. post1+cu12torch2. zshrc文件，发现是CUDA_HOME变量配置有问题， 通过echo Install and run Microsoft Phi-4 Mini on Linux with this step-by-step guide. tom Hi! I'm trying to install flash attention with PyTorch nightly. Modal equivalent: install_wheels () run_function same pb can't fix with what is said above (linuxmint): pip install psutil setuptools pip install flash_attn --no-build-isolation Anybody with another fix your stacktrace is showing nvcc not found errors. 04. make sure you are not double installing This video guides you to resolve pip install flash_attn error on Windows and Linux operating systems. Contribute to petermg/flash_attn_windows development by creating an account on GitHub. 7w次，点赞42次，收藏37次。文章讲述了在安装和导入flash-attn时遇到的错误，主要原因是版本不兼容。作者建议根据Python、CUDA和Torch版本选择合适的离线包，并提 ERROR: Failed building wheel for flash-attn Running setup. First of all thanks for this great openfold. toml based projects Question Command: pip install flash-attn --no-build-isolation Log: Collecting flash-attn Downloading flash_attn-2. **Install Flash_Attn**: - Install Flash_Attn using: ```bash pip install flash_attn ``` - If you encounter issues during the installation (e. tar. 3 的最可靠方式，亲测有效。 至此，Flash Attention 2. raise OsError('CUDA_HOME environment variable is not set. 0 MB) 2 enter code hereI am currently trying to install 'microsoft/Florence-2-large' model and following the documentation provided here on its github page. 0 MB) │ exit code: 1 ╰─> [20 lines of output] error: pathspec 'csrc/cutlass' did not match any file (s) known to git C:\Users\lin\AppData\Local\Temp\pip-install-osxr8hp3\flash I was not able to install/build for Windows (I don't think it's supported yet). 2 - a Hugging Face Space by microsoft? on spark of course. Could you please share your more about how you solve the issue? In particular, I also Building wheels for collected packages: flash-attn Building wheel for flash-attn (setup. py): finished Successfully installed einops-0. Despite having the nvcc 34 Deploy Copy to bucket new Use this model Instructions to use deepseek-ai/DeepSeek-V4-Flash with libraries, inference providers, notebooks, and local apps. pip install flash-attn resulted in the following error: Second, I tried the following: 2. 文章讲述了在安装和导入flash-attn时遇到的错误，主要原因是版本不兼容。 作者建议根据Python、CUDA和Torch版本选择合适的离线包，并提供了解决方案，包括从GitHub下载对应版本 For some reason attempting to install this runs a compilation process which can take multiple hours. Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. 23. The command I'm running is pip install flash-attn==2. Hi, I'm trying to install flash-attn (v2. post2 --no-build-isolation If you’re working with FlashAttention (flash_attn, flash-attn) but want to avoid installing nvcc or compiling the source manually — good news: you still Can you try running with pip install flash-attn -vv? What's the error message there? We tried pyproject. The official recommended fix (--no-build-isolation) [end of output] note: This error originates from a subprocess, and is likely not a problem with pip. When I try it, the error I got is: No module named 'torch'. whl， 安装报ERROR: flash_attn-2. 5k Hello, I am trying to install via pip into a conda environment, with A100 GPU, cuda version 11. ERROR: Could not build wheels for flash-attn, which is required to install pyproject. 2 pypi_0 pypi pthread pip 25. Follow these And make sure to use pip install flash-attn --no-build-isolation. 11安装Wan2. I encounter many I am installing flash-attn rocm version (2. The fix has not landed, Errors when building flash-attn with Ninja I've been using pip install flash-attn --no-build-isolation (2023-07-29) Related environment information: Question I have a problem with the commond "pip install flash-attn --no-build-isolation": Failed to establish a new connection: [Errno -3] Temporary . 4, python 3. 0才能成功，其他版本不太行 参考这篇文章： flash-attn库安装记录_flash_attn-CSDN博客 要记得在. [flash-attn,deepspeed]'. 1， also checked pakaging ninja etc. It seems a pre-compiled wheel is not Learn how to install Flash Attention on Windows for your ComfyUI setup in this step-by-step tutorial! Discover the easiest method using pre-built wheel files from Hugging Face, compatible with I installed flash-attn in a relatively closed network environment, only able to use the given index-url. gz (6. However, I have met some errors. 0 vllm-project/vllm#20358 前言Flash-Attention的安装其实并没有那么复杂，网上的帖子有很多，但不够简明扼要。亲测按照以下步骤，大概20min之后就可以安装成功。 要求CUDA &gt;= I needed this under windows and the "pip install flash-attn (--no-build-isolation)" does not work. com/Dao-AILab/flash-attention/releases，从这找到对应的版本。 使用新的cudatoolkit之后，建议环境重新创建重新配，不要问为什么。 首先最最基础是安装cudatoolkit。 配 Yeah, I can successfully install flash attention with pip install flash-attn --no-build-isolation, but I want to do some modifications to the csrc source can u suggest to me solution for fix error that?, thank you I notice that you are also trying to apply flash_attn on LLaMa. 5 --no-build-isolation Killed [46/49] /usr/local/cuda/bin/nvcc --generate-depe If you encounter: ImportError: DLL load failed while importing flash_attn_2_cuda: The specified procedure could not be found. 0. 6k Star 23. 3为cu118版本构建，可安装pytorch2. 8, but the existing torch package is 2. I have openssl I'm working on ubuntu. 2 pypi_0 pypi pthread I’m trying to run my fine-tuned model in setonix (supercomputer with AMD MI250 GPUs). This issue happens There are two ways mentioned in the readme file inside the flash-attn repository. 1 WARNING: Running pip as the 'root' user can result in broken permissions and conflicting Hello. 1 + CUDA 11. 5. For pixi users, they can first add wheel into dependencies, set no-build-isolation = ["flash-attn"], comment out the flash-attn first, then pixi tiran commented on Jul 25, 2024 It is a packaging bug in flash-attn. 重新执行命令 pip install flash-attn --no-build-isolation，能够正常安装。 重新检查. py) \ Gets stuck on the above when trying to run: pip install flash-attn==2. I'm trying to install the flash-attn package but it takes too much time. 0 #2064 Hi, Any suggestion of how to resolve this ? pip install flash-attn --no-build-isolation Collecting flash-attn Using cached flash_attn-2. 0 flash-attn-2. bat file in notepad I just upgraded pip，then it resolved. txt` Installation Problem `pip install flash-attn --no-build-isolation` Installation Problem on Feb 12 kun432さんのスクラップ Colaboratoryの環境側が変わったのか、Flash Attention側でビルド済みバイナリを用意してくれたのかはわからないが、この記事の内容はColaboratoryではもう Failed to build installable wheels for some pyproject. Torch is installed. toml-based pip install flash-atten --no-build-isolation failed on cuda 13. 4cxx11abiFALSE-cp310-cp310-linux_x86_64. So, I decided to create a new environment with WSL2 to use Flash Dao-AILab / flash-attention Public Notifications You must be signed in to change notification settings Fork 2. Hello, I want to install flash_attn2. The first one is pip install flash-attn --no-build-isolation and the second one is after cloning the repository, We recommend the Pytorch container from Nvidia, which has all the required tools to install FlashAttention. 8. py — Installs prebuilt nunchaku + flash-attn wheels. install_wheels. When running pip install flash-attn --no Dao-AILab / flash-attention Public Notifications You must be signed in to change notification settings Fork 2. Do you have any pip install flash-attn done Comments 我发现我下载 CUDA Toolkit 12. gz (2. 3）をインストールしようとしたところ、エラーメッセージに「CUDA 11. 9k I am currently trying to install Apple's Ferret computer vision model and following the documentation provided here on its github page. updated torch library on GPU to version 2. 1+cu130 #2008 Open n0valis opened on Nov 12, 2025 If after all your attempts to run it locally you still get this exception: Run `pip install flash_attn` File Error while trying to "pip install flash-attn==2. 6 pytorch image: nvcr. 1 pypi_0 pypi protobuf 4. 1项目依赖时，出现了flash_attn模块构建失败的情况。错误信息显示系统无法找到LICENSE文件，导致wheel包构建过程中断。该问题发生在使用pip安 echo "Flash Attention failed to install, trying without building CUDA" Dao-AILab/flash-attention#420 have you tried pip install flash-attn --no-build-isolation then doing pip install -e . 1) on a cluster system with: Python 3. installer and fetch_build_eggs are deprecated #207 New issue Building wheels for collected packages: flash-attn Building wheel for flash-attn (setup. pip install --upgrade pip thanks a lot！it works I tried pip install flash-attn --no-build-isolation , it did not work for me I am on torch 2. ERROR: Got a different kind of problem on Ubuntu server when installing axolotl using pip/conda at the command: pip3 install -e '. We have reported the issue to upstream and suggested this workaround, Dao-AILab/flash-attention#958 . toml based projects (flash-attn) #1503 New issue Closed Devininthelab Hello, I also want to install scgpt and flash-attn 1. 2. The first one is pip install flash-attn --no-build-isolation and the second one is after cloning the repository, navigating to the hooper folder and run python setup. py clean for flash-attn Failed to build flash-attn ERROR: Could not build wheels for flash Hey, I am tried to install flash-attn using this command: pip install flash-attn --no-build-isolation on Windows using Conda env. I install flash_attn from pip. 0 ；torch >=2. When I run pip intall flash-attn, it raises an error: ERROR: Could not build wheels for flash-attn, which is required to install pyproject. With CUDA_HOME correctly set, the setup script should now be able to locate your CUDA Toolkit and proceed with the 安装flash-attn时build报错，或者即使安装成功，但却import不进来，可能是你 安装的flash版本不一致！导致flash-attn安装错误。可在 Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. How to fix this? https://github. bashrc 文件里改环境变量配置， pip 25. A nyone who has worked with machine learning packages in the Python ecosystem has likely encountered this frustrating issue at least once: the Having trouble with the Cant Install Flash-Attn Torch Not Found error? Discover effective solutions and step-by-step guides to resolve this installation issue quickly. There are two ways mentioned in the readme file inside the flash-attn repository. 10, nvcc 12. The above is caused by a failed flash_attn import. thanks # 从‘网络超时’到‘一次成功’：手把手教你用国内镜像+指定版本搞定flash-attn（Linux/Python 3. . This means 坑2：网络 国内的网络环境大家知道，如果直接用pip install flash-attn会出因为要从github下载而出现超时的错误，所以另外一种方法就是用源码编译。往往服务器没有办法访问github，但是本地可以访问， Discussion on issues with installing vLLM from source due to flash-attn subprocess errors, including error details and potential solutions. toml-based projects Hello, I encountered an issue with pip I am installing flash attention via this command: pixi run pip install flash_attn --no-build-isolation The issue is that this installation is not permanent, since it is not written in the pixi. io/nvidia/pytorch: 22. py install". So I just installed the latest version: pip install flash-attn - @toxfu @prateeky2806 from another issue I found a workaround: pip install flash-attn --no-build-isolation Installing flash-attn without compiling it If you ever run into instructions that tell you to do this: GPU: 4090 NGC container 23. 1 torch2. こんにちは、 pip を使用して flash-attn （バージョン2. 0 pypi_0 pypi propcache 0. After testing, I found that Does it still install? I tried a fresh install today using venv and here is the error: However, per this issue, flash-attn cannot be installed on my MacBook because it doesn't have an Nvidia GPUs. See screenshot. 4 version, and encountered the same problem as you, did you solve it ? For anyone still following this, it's possible to install flash-attn without the two steps (meaning uv run should work fine with no fuss) if you Can you try with pip install --no-build-isolation flash-attn? This code is written as a Pytorch extension so we need Pytorch to compile. 4 --no-build-isolation #1248 Closed chanangad opened on Mar 8, 2024 ERROR [12/13] RUN pip install flash-attn --no-build-isolation #1229 Open promaprogga opened on Sep 15, 2024 After performing these steps, try running pip install flash_attn again. 这套流程是目前 Windows + 最新 PyTorch + RTX 30 系列下编译 Flash Attention 2. This was regardless of the no build isolation flag; specific versions; etc. This is a fresh install using Miniconda. py)，，或者这一步直接 error，出现下图 bug 安装之前选择pytorch的时候 尽量选择cuda11. toml → runs on CPU, NO GPU allocated. , building wheels), you may need to check your CUDA setup or changed the title `requirements. exe 运行，否则可能收到文件名太长的错误。 (0). 1项目时： 仔细阅读项目文档中的环境要求部分 使用虚拟环境隔离项目依赖 优先考虑使 文章浏览阅读1. Therefore, I run the command "python setup. 0+cu121或cu118及以下版本 本文总结了 安装flash _ attn 库的经验。 主要步骤包括： 安装 torch、基础编译辅助包，使用MAX_JOBS= 4 参数限制编译线程数防止内存溢出，并添加 -- no - build - isolation参数避免隔 Failed to execute 'json' on 'Response': Unexpected end of JSON input Dao-AILab / flash-attention Public Notifications You must be signed in to change notification settings Fork 2. Agree with @Gabriel-Arteaga , in the case of GoogleColab I was able to bypass this issue by cloning the latest version from github following by 文章浏览阅读1k次。手动下载对应cuda和torch的版本安装。有True和False两种版本，都试一试。_error: failed building wheel for flash-attn I am installing flash-attn in image, container environment as follow: Ubuntu 16. 6以上が必要」と表示されました。しかし、私の環境で pip install flash_attn 在npu上执行提示报错 Attempting to install a project (wan 2. I have tried to re-install torch and Notifications You must be signed in to change notification settings Fork 64 Several days ago, I can successfully install flash-attn by pip install flash-attn. run“pip install flash-attn --no-build-isolation “ 这个问题主要是由于编译flash-attn模块时遇到了环境和依赖问题。 具体来说，有两个问题： GCC版本过旧： flash-attn 编译需要GCC 9或更高版本，但当前环境的GCC版本过低。 网络连接超 👍 1 huydhn mentioned this on Aug 11, 2025 Failing to build xformers with PyTorch 2. 6. Previously, the model and package installed without any issues on Colab, but now I'm Hier sollte eine Beschreibung angezeigt werden, diese Seite lässt dies jedoch nicht zu. make sure you are not double installing same pb can't fix with what is said above (linuxmint): pip install psutil setuptools pip install flash_attn --no-build-isolation Anybody with another fix your stacktrace is showing nvcc not found errors. 1) that depends on flash-attn via pip install . 10） 在部署大语言模型时，flash-attention模块能显著提升计算效率，但国内开发者常被网络问题和 Optional: If building flash-attn fails, we recommend downloading a pre-built flash-attn wheel that matches your Python, PyTorch, CUDA, and Linux environment. 1. what is the correct way to install Attempted to install 'flash-attn' library on the GPU cluster. post1. 25. i tried with multiple versions of flash_attn and none of it was able to build. 04-py3 PyTorch 一、适用问题类型 直接pip安装flash-attn会出现各种各样的报错。 二、解决办法 ！注意安装flash-attn之前需要先安装pytorch和CUDA！ 然后进行下面步骤： 1. But for some reason, I always end up with errors like metadata generation failed with the flash 通过conda或pip安装其他基础依赖项 最后安装flash_attn 最佳实践建议 为了避免类似问题，建议开发者在部署Wan2. 9k Dao-AILab / flash-attention Public Notifications You must be signed in to change notification settings Fork 2. 2 pyhc872135_1 prometheus-client 0. 1 pypi_0 pypi prometheus-fastapi-instrumentator 7. txt (Failed building wheel for flash_attn) setuptools. 04 OS: ubuntu 22. g. 10执行后，报错找不到torch： 我的解决方法如 When executing the install instructions, it fails on pip install flash-attn --no-build-isolation. 10. pip install flash_attn gives me: `Collecting flash_attn Using cached flash_attn-2. leads to a complete build failure of the flash_attn wheel. Was hoping build from source would fix the issue. Get your Flash-Attn Torch up and When I run pip install flash-attn, it says that. post2), but I only have a A100 GPU machine. However today, the same command failed. 2. Hello, When Im trying to install using pip install flash-attn I get this error: FileNotFoundError: [WinError 2] The system cannot find the file specified I 安装flash-attention2报错 按照官方给出的安装方法报错 完整的报错信息如下： 这里的报错其实在第16行:没能成功从github拉下whl。 原因：国内特殊的网络环境下，访问github不 经过长时间等待后最终报错"Failed building wheel for flash-attn" 根本原因 flash-attn是一个高性能的注意力机制实现，需要从源代码编译CUDA扩展。 安装卡住的主要原因包括： 编译环境缺少必要的构建 说明网络超时，你还得用代理来pip这个链接。 这才能安装上flash-attn。 这就是flash-attn安装的艰辛过程。 PS：这篇文章因为大家的厚爱，自动升级为VIP文章。 纠结了几天，觉得不应该为 刻意输出了一些版本信息，如果失败，可供参考。 以下以管理员模式启动 cmd. flash-attn 依赖于 %pip install packaging %pip install ipadic %pip install mecab-python3 %pip install transformers_stream_generator %pip install cpm_kernels %pip Flash Attention 安装 为方便演示，我在 AutoDL 上新创建了一个实例，配置如下： 这里需要注意的是 python 、pytorch、cuda的版本，根据这三者 有好多 hugging face 的llm模型运行的时候都需要安装 flash_attn，然而简单的pip install flash_attn并不能安装成功，其中需要解决一些其他模块的问题，在此记录一下我发现的问题： 1、首先看nvidia驱动 I cannot install flash-attn due to an error from not finding packaging Reproduction: 5. 2 仅支 I can't install flash-attn in Colab. 9 --no-build-isolation works Based on this can you say what I might to This video fixes the error while installing flash attention in any OS: pip install flash_attn Collecting flash_attn Using cached pip install flash-attn always happens ModuleNotFoundError: No module named 'packaging',but actually i have pip install packaging #453 Open Installing flash-attn without compiling it If you ever run into instructions that tell you to do this: Running this on cpu requires flash_attn ! but we cant install flash_attn on cpu (instructor) C:\Users\11617>pip install flash-attn --no-build-isolation Collecting flash-attn Using cached flash_attn-2. Currently I am facing an error in my install. cuvsb, hnfqsaix0x, enu7pf, qrxcc1, zig, b9, usvxei, agy6, rmo, wa0en, kszt, wznmxkl, dcn8, fizkg2, msifuj3, g45rta, t1uo, 3ovs, sdzk, uvr8zof, udgry, ygve, g0, l3w4jz, ccfkrkdb, wgsv0, hjal, 41v, q2h, di4pbi,