---
title: "Composer Dependency Errors from Packagist Naming Conflict"
date: "2026-01-28T15:14:02+00:00"
summary:
image:
type: "article"
url: "/acquia-cloud-platform/add-ons/cloud-ide/help/96096-composer-dependency-errors-packagist-naming-conflict"
id: "a098f346-1638-4242-ba1d-857ac9ebc3cf"
---

**Issue description**

You must address dependency resolution errors while you use `packagist` as a repository name in a `composer.json` file. These errors occur even if `composer diagnose` indicates that all connections work correctly.

**Symptoms**

*   Accessibility of all repositories is reported by the `composer diagnose` command.
    
*   Dependency resolution errors can cause `composer update` or `composer install` to fail.
    
*   The system displays error messages that indicate packages are missing from remote repositories.
    *   For example: `found [package] in the lock file but not in remote repositories`

**Root cause**

Composer reserves the repository name `packagist` because it refers to the default package repository at https://packagist.org. When `packagist` is used as a custom repository name, it creates a naming conflict that prevents Composer from resolving dependencies.

**Solution**

Rename the custom repository from `packagist` to a different descriptive name in the `composer.json` file.

**Before (configuration that causes errors):**

    
    {
     "repositories": {
       "drupal": {
         "type": "composer",
         "url": "https://packages.drupal.org/8"
       },
       "packagist": {
         "type": "composer",
         "url": "https://asset-packagist.org"
       }
     }
    }

**After (fixed configuration):**

    {
     "repositories": {
       "drupal": {
         "type": "composer",
         "url": "https://packages.drupal.org/8"
       },
       "asset-packagist": {
         "type": "composer",
         "url": "https://asset-packagist.org"
       }
     }
    }

Recommended repository names
----------------------------

Use descriptive alternatives such as:

*   `asset-packagist`
    
*   `bower-packagist`
    
*   `npm-packagist`
    
*   `custom-assets`
    
*   `company-packages`
    

**Steps to fix**

To resolve the naming conflict:

1.  Open the `composer.json` file.
    
2.  Locate the `repositories` section.
    
3.  Find any repository named `packagist`.
    
4.  Rename the repository to a descriptive alternative such as `asset-packagist`.
    
5.  Save the file.
    
6.  Run `composer update` to verify the fix.
    

**Why this happens**

*   Composer reserves `packagist` as a special repository name.
    
*   The naming conflict prevents proper dependency resolution.
    
*   Verifies that connectivity is handled by `composer diagnose`, though it does not check for naming conflicts. 
    
*   The issue appears only during package installation or updates.
    

**Important notes**

*   This issue is a configuration error rather than a problem with the repository service.
    
*   The repository URL remains unchanged.
    
*   This fix does not affect project features.
    
*   The issue affects all Composer 2.x versions.