dotnet/runtime · error · Error

ProductVersion environment variable is not defined

Error message

ProductVersion environment variable is not defined

What it means

rollup.config.defines.js requires ProductVersion (e.g. 8.0.0) so it can stamp version-specific output paths and the envConstants block baked into the runtime. Undefined ProductVersion would embed 'undefined' into artifact paths and the runtime's self-description, so the config fails fast at line 14-16.

Source

Thrown at src/native/rollup.config.defines.js:15

//! Licensed to the .NET Foundation under one or more agreements.
//! The .NET Foundation licenses this file to you under the MIT license.

/* eslint-disable no-console */

import gitCommitInfo from "git-commit-info";

if (process.env.ContinuousIntegrationBuild === undefined) {
    throw new Error("ContinuousIntegrationBuild environment variable is not defined");
}
if (process.env.Configuration === undefined) {
    throw new Error("Configuration environment variable is not defined");
}
if (process.env.ProductVersion === undefined) {
    throw new Error("ProductVersion environment variable is not defined");
}

export const configuration = process.env.Configuration !== "Release" && process.env.Configuration !== "RELEASE" ? "Debug" : "Release";
export const runtimeFlavor = process.env.RuntimeFlavor || "CoreCLR";
export const productVersion = process.env.ProductVersion;
export const isContinuousIntegrationBuild = process.env.ContinuousIntegrationBuild === "true" ? true : false;
export const staticLibDestination = process.env.StaticLibDestination || `../../artifacts/obj/native/net${productVersion}-browser-${configuration}-wasm/lib`;

console.log(`Rollup configuration: Configuration=${configuration}, RuntimeFlavor=${runtimeFlavor}, ProductVersion=${productVersion}, ContinuousIntegrationBuild=${isContinuousIntegrationBuild}`);

export const banner = "//! Licensed to the .NET Foundation under one or more agreements.\n//! The .NET Foundation licenses this file to you under the MIT license.\n//! This is generated file, see src/native/rollup.config.js\n\n";
export const banner_dts = banner + "//! This is not considered public API with backward compatibility guarantees. \n";
export const keep_classnames = /(ManagedObject|ManagedError|Span|ArraySegment)/;
export const keep_fnames = /(dotnetUpdateInternals|dotnetUpdateInternalsSubscriber)/;
export const reserved = [
    "_ems_", "Module",
    "dotnetInternals", "dotnetUpdateInternals", "dotnetUpdateInternalsSubscriber", "dotnetInitializeModule",
    "dotnetLogger", "dotnetAssert", "dotnetApi",

View on GitHub (pinned to 60108ba66e)

Solutions

1. Use the MSBuild target for the native project, which derives ProductVersion from the project file and exports it.
2. Set ProductVersion explicitly to match the runtime version, e.g. `ProductVersion=8.0.0`.
3. Confirm the variable is present in the same shell that runs rollup (`echo $ProductVersion`).

Example fix

# before
rollup -c  # throws ProductVersion not defined

# after
ProductVersion=8.0.0 ContinuousIntegrationBuild=false Configuration=Debug rollup -c

if (process.env.ProductVersion === undefined) {
  throw new Error('Set ProductVersion (e.g. 8.0.0) before running rollup');
}

function hasProductVersionEnv(env: NodeJS.ProcessEnv): boolean {
  return env.ProductVersion !== undefined;
}

When it happens

Trigger: Importing rollup.config.defines.js (transitively via the rollup build) without ProductVersion in the environment. The check at rollup.config.defines.js:14-16 throws before any exports are produced. Common when invoking rollup outside of MSBuild.

Common situations: Running rollup by hand. A CI job that sets ContinuousIntegrationBuild and Configuration but forgets ProductVersion. Building after a version bump where the new prop was not propagated to the env.

Related errors

• ContinuousIntegrationBuild environment variable is not defin
• Configuration environment variable is not defined
• Expected environment variable '${k}' to be a string but it w
• Unexpected behavior ${asset.behavior} of asset ${asset.name}
• __stack_pointer was not preserved by the linker or optimizer

AI-assisted analysis of dotnet/runtime@60108ba66e (2026-08-10). Data as JSON: /api/errors/9abe96c37ec0592d. Report an issue: GitHub.