Can not build when using PandaCSS

Describe the bug

I created a WXT project with PandaCSS, it work well when developping by pnpm run dev, but when I run pnpm run build, it report an error: Error: Loading PostCSS Plugin failed: Invalid URL.

Reproduction

See the steps to reproduce.

Steps to reproduce

pnpm dlx wxt@latest init  # use solidjs
cd project
pnpm install
pnpm add -D @pandacss/dev
pnpm exec panda init --postcss
pnpm run build # reports error

System Info

System:
    OS: Linux 6.12 Arch Linux
    CPU: (32) x64 AMD Ryzen 9 7950X 16-Core Processor
    Memory: 43.61 GB / 61.88 GB
    Container: Yes
    Shell: 5.9 - /bin/zsh
  Binaries:
    Node: 22.5.1 - ~/.local/share/pnpm/node
    Yarn: 1.22.22 - /usr/bin/yarn
    npm: 10.8.2 - ~/.local/share/pnpm/npm
    pnpm: 9.14.3 - ~/.local/share/pnpm/pnpm
    bun: 1.1.36 - ~/.local/share/bun/bin/bun
  Browsers:
    Chromium: 131.0.6778.85
  npmPackages:
    wxt: ^0.19.13 => 0.19.17

Used Package Manager

pnpm

Validations

• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that reports the same bug to avoid creating a duplicate.
• Check that this is a concrete bug. For Q&A open a GitHub Discussion or join our Discord Chat Server.
• The provided reproduction is a minimal reproducible example of the bug.

Start by reproducing the failure with the listed pnpm commands in a WXT project using PandaCSS, then trace the build path that loads the PostCSS plugin and the reported Invalid URL error. Done means pnpm run build succeeds for this minimal PandaCSS setup.