Is there a way to install "requirements.txt" from all the custom nodes simultaneously ?

[Adahm83]

I have two instances of ComfyUI portable,
Comfy1 running python 3.13 with a lot of custom nodes installed, and
Comfy2 with python 3.12 with extra_model_paths.yaml linked to Comfy1 -> custom_nodes: "path_to_Comfy2_custom-nodes"

Now Comfy2 see all the custom-nodes from Comfy1 but they doesn't work because all the requirements are not installed in Comfy1

Using the ComfyUI Manager in Comfy2 "Update All" doesn't solve the problem

I would like to somehow automate this command:

.\python_embeded\python.exe -s -m pip install -r "path_to_all_custom_nodes" requirements.txt

Can someone advise how to do it ?

[Adahm83]

Nevermind, I have asked ChatGPT and here's the solution:

Perfect 👍 — you want a Windows CMD (batch) script that:

• Goes through each subfolder inside .\ComfyUI\custom_nodes\
• Runs this command for each:
• .\python_embeded\python.exe -s -m pip install -r .\ComfyUI\custom_nodes<subfolder>\requirements.txt
• (if requirements.txt exists)
• Here’s the full working .bat script for that:

@echo off
setlocal enabledelayedexpansion

echo ================================================
echo Installing requirements for all custom nodes...
echo ================================================
echo.

REM Loop through all subdirectories in ComfyUI\custom_nodes
for /D %%D in (".\ComfyUI\custom_nodes\*") do (
    if exist "%%D\requirements.txt" (
        echo Installing requirements for %%~nxD...
        .\python_embeded\python.exe -s -m pip install -r "%%D\requirements.txt"
        echo.
    ) else (
        echo Skipping %%~nxD (no requirements.txt found)
        echo.
    )
)

echo ================================================
echo Done installing all requirements!
echo ================================================
pause

🧩 How to use it
Open Notepad
Paste the script above
Save it as something like install_all_nodes.bat in your project’s root folder (where the python_embeded and ComfyUI folders are)
Double-click the .bat file or run it in CMD
✅ Notes
It safely skips subfolders without a requirements.txt.
It uses relative paths, so make sure you run it from the same directory that contains python_embeded and ComfyUI.
You can add @echo on inside the loop if you want to see each pip command in detail.

I can confirm that it works, just be careful, if you have a lot of custom-nodes this will take quite some time 🤓

[Rogala]

Create a snapshot of packages from Comfy1 and deploy it in Comfy2 using the previously created requirements.txt file.

pip freeze > requirements.txt