Not able to deploy pixcel extention app Using cli

Shopify Apps

Topic summary

Multiple developers are encountering the same deployment error when trying to deploy a Shopify pixel extension app using the CLI. The issue occurs after following the official Shopify tutorial for creating pixel extension apps.

Error Details:

  • Build completes successfully, but deployment fails during the UI extensions building phase
  • Core error message: “Failed to create output directory: mkdir E:\C:: The filename, directory name, or volume label syntax is incorrect”
  • The error appears to be related to an invalid file path syntax on Windows systems
  • esbuild process fails when attempting to create the output directory

Current Status:

  • At least 4 developers have reported experiencing this identical issue
  • No solution has been found or shared yet
  • The discussion remains open with participants asking each other if anyone has discovered a workaround
  • The problem appears specific to the partition/directory path handling during the build process
Summarized with AI on November 25. AI used: claude-sonnet-4-5-20250929.
1

Hello @All
I am getting issues which deploying pixel extension app

I have followed this tutorial for creating pixel extension app

https://shopify.dev/apps/pixels/pixels-getting-started

------------app build successfully :but when I am trying to deploy it getting this error

Deploying your work to Shopify Partners. It will be part of pixcelapp

ui-extensions | Building UI extensions…
ui-extensions | pixcel-extention-app (> error: Failed to create output directory: mkdir E:\C:: The filename, directory name, or volume label syntax is incorrect.
ui-extensions |
ui-extensions |
ui-extensions | …5bb71a33985170\bundle\8a372000-ea68-46cd-80ec-867b27db434a\main.js 192b
ui-extensions |
ui-extensions | Done in 4ms
ui-extensions | Error building extension: Error: Build failed with 1 error:
ui-extensions | error: Failed to create output directory: mkdir E:\C:: The filename, directory name, or volume label syntax is incorrect.
ui-extensions | at failureErrorWithLog [email removed]
ui-extensions | at [email removed]
ui-extensions | at runOnEndCallbacks [email removed]
ui-extensions | at buildResponseToResult [email removed]
ui-extensions | at [email removed]
ui-extensions | at [email removed]
ui-extensions | at handleIncomingPacket [email removed]
ui-extensions | at Socket.readFromStdout [email removed]
ui-extensions | at Socket.emit (node:events:527:28)
ui-extensions | at addChunk (node:internal/streams/readable:315:12) {
ui-extensions | errors: [
ui-extensions | {
ui-extensions | detail: undefined,
ui-extensions | location: null,
ui-extensions | notes: [],
ui-extensions | pluginName: ‘’,
ui-extensions | text: ‘Failed to create output directory: mkdir E:\C:: The filename, directory name, or volume label syntax is incorrect.’
ui-extensions | }
ui-extensions | ],
ui-extensions | warnings: []
ui-extensions | })

━━━━━━ Error ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
Command failed with exit code 1: C:/Users/admin/AppData/Local/shopify-cli-nodejs/Cache/vendor/binaries/extensions/3.15.0-windows-amd64.exe build -
pixcel-extention-app (> error: Failed to create output directory: mkdir E:\C:: The filename, directory name, or volume label syntax is incorrect.

…5bb71a33985170\bundle\8a372000-ea68-46cd-80ec-867b27db434a\main.js 192b

this is the same error I have experienced before while working with checkout extension
https://community.shopify.com/c/shopify-apps/not-able-to-deploy-checkout-ui-extension/td-p/1677716
please help

3 Likes
2

@imrankhansm I hope you doing well.
i have same issue have you fixed the issue ?? if yes share the solution.

1 Like
3

The same here. The exact error related to partition. Any help would be appreciated.

4

@imrankhansm hi… i’m facing the same issue.. if you have found any solution please share with me that would be great help.

5

@1080 hi… have you found any solutions for web pixel extension deployment error? if you have found any resource for solving the error please share it.

1 Like
6

@ranawaqarahmad not yet

1 Like