Rollup isn't letting me build the website as a static-site

[SSP6904]

Astro Info

Astro                    v7.0.0
Vite                     v7.3.5
Node                     v26.3.1
System                   Windows (x64)
Package Manager          npm
Output                   static
Adapter                  none
Integrations             none

If this issue only occurs in one browser, which browser is a problem?

No response

Describe the Bug

I just updated Astro to version 7 after it was released and I wanted to make sure that the build command will work well with my current configuration. However, I'm getting an error message from the Rollup package that says something about the input options and that it should not be an "html file" when I'm building for server side rendering. The problem that I'm seeing with this stack trace is that I'm not actually building the website with server side rendering, and that I'm only building the website as a static-based website for GitHub Pages. Below is the exact stack trace that I'm getting based on the information that I've provided above. Note that some of the information from the stack trace will have some information hidden to prevent any sensitive information.

rollupOptions.input should not be an html file when building for SSR. Please specify a dedicated SSR entry.
  Location:
    C:\REDACTED\node_modules\vite\dist\node\chunks\config.js:33532:73
  Stack trace:
    at resolveRollupOptions (file:///C:/REDACTED/node_modules/vite/dist/node/chunks/config.js:33532:73)
    at Object.build (file:///C:/REDACTED/node_modules/vite/dist/node/chunks/config.js:33980:25)
    at Object.buildApp (file:///C:/REDACTED/node_modules/vite/dist/node/chunks/config.js:33972:26)
    at async viteBuild (file:///C:/REDACTED/node_modules/astro/dist/core/build/static-build.js:68:3)
    at async AstroBuilder.run (file:///C:/REDACTED/astro/dist/core/build/index.js:197:7)

I'm not sure if anyone else is having the same issue that I'm dealing with here, but if anyone was able to reproduce this issue, please let me know.

What's the expected result?

The website should be full compiled into the output folder that is being used from the configuration file.

Link to Minimal Reproducible Example

https://stackblitz.com/edit/github-3m7mq7mj

Participation

• I am willing to submit a pull request for this issue.

[SSP6904]

Side note: The only workaround that I was able to do in getting around this issue was to revert the Astro version back to v6.4.8 until someone is able to resolve this. Here's what I mean by this: https://github.com/SSP6904/ssp6904.github.io/actions/runs/27957584949/job/82729986628

[astrobot-houston]

• Reproduced: No — the build succeeds with output: 'static' using the current Astro v7.0.0 and its required Vite dependency (^8.0.13).
• Exploration: No
• Unit Test: No — no bug was found in the Astro codebase to test.
• Priority: P2: has workaround. This appears to be a dependency version mismatch in the reporter's environment rather than a bug in Astro. Users who install Astro v7 cleanly will not encounter this.

The error message rollupOptions.input should not be an html file when building for SSR does not exist anywhere in Vite 8, which is the version Astro v7.0.0 requires ("vite": "^8.0.13" in package.json). The reporter's Astro Info block shows Vite v7.3.5, which is incompatible with Astro v7. This strongly indicates a stale or corrupted node_modules — likely the user upgraded astro but npm resolved/hoisted an older Vite version from a lockfile or cache.

I was unable to determine the cause of this issue within Astro itself. The root cause appears to be a Vite version mismatch in the reporter's local environment. The recommended fix for the reporter is:

1. Delete node_modules and package-lock.json (or the equivalent lockfile).
2. Run npm install fresh to ensure Vite ^8.0.13 is installed as required by Astro v7.
3. Verify with npx astro info that Vite shows v8.x.

If the issue persists after a clean install, we'd need a reproducible example with the exact package.json to investigate further.

Full Triage Report

Reproduction Attempt

Environment: Astro v7.0.0, Vite v8.0.14, Node v24.15.0 (Linux)

Created a minimal static Astro project with a single src/pages/index.astro page and output: 'static' (also tested with default config). The build completed successfully in all cases:

[build] output: "static"
[build] mode: "static"
[build] 1 page(s) built in 390ms
[build] Complete!

Also tested with custom vite.build.rollupOptions.input pointing to an .astro file and an .html file — both built without the reported error.

Analysis

• Vite version mismatch: The reporter shows Vite v7.3.5 in their Astro Info, but Astro v7.0.0's package.json declares "vite": "^8.0.13". The error message rollupOptions.input should not be an html file when building for SSR is not present in the Vite 8 codebase (confirmed via grep). This error likely exists in Vite 7.x.
• Error location: The stack trace shows the error originating from resolveRollupOptions in Vite's config module, which is Vite's own validation — not Astro code.
• Conclusion: The reporter's environment has an incompatible Vite version installed alongside Astro v7. This is likely caused by a stale lockfile, npm cache, or hoisted dependency from a previous install.

StackBlitz Link

The reporter provided a StackBlitz link (https://stackblitz.com/edit/github-3m7mq7mj) but the reproduction could not be accessed/verified in this headless environment. The local reproduction with the same reported setup (static output, no adapter, no integrations) did not reproduce the error.

This report was made by an LLM. The analysis may be wrong, and the potential fix might not work, but is intended as a starting point for exploring the issue.

[SSP6904]

The issue has been resolved for me. Sorry for the inconveniences that were made from this.