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Graph/env-vars-not-propagated-across-contexts

Pattern

Environment Variables Not Propagated

env-vars-not-propagated-across-contexts

Build-time environment variables fail to propagate into the actual runtime/build contexts (Azure, monorepos, CI/Vercel, or Next.js config), so code reads empty/missing values and breaks features like database access or runtime configuration.

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Updated8/2/2026

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30 linked nodes

Resend emails do not send when Next.js is built with output: "export"

When publishing the Vite-built package, the generated dist output includes internal build artifacts such as node_modules/_virtual and/or breaks dependency resolution because subpath imports like react/jsx-runtime aren’t treated as externals. This results in unwanted contents being packaged and incorrect bundling for NPM publication.

it is not recognized through my SvelteKit website — share a `.env.local` env variables file through my entire Turborepo app. Tension: I could use `dotenv-cli` in the `package.json` scripts but I'd like to avoid it.

functions failing because it was trying to run code in a folder that only contained the path to the folder in the virtual store — After running `pnpm install` inside the Azure Function app package. Tension: `node_modules/@azure/storage-queue` would not have any files, just, `../../../node_modules/.pnpm` symlink which wouldn't work because those files were outside of the Function App and therefore not deployed. Outcome: Add `.npmrc` at root and add `config node-linker=hoisted`.

Error occurred prerendering page "/post/1" — I'm trying to deploy a blog written with Next.js v15.3.3 with Vercel. Tension: TypeError: Cannot read properties of null (reading 'useState'). Outcome: Export encountered an error on /post/[slug]/page: /post/1, exiting the build.

Deploying a monorepo with a React client and Node/Express server on Vercel using a shared origin fails: the server cannot reliably serve client static files from client/dist, leading to missing/dist errors or 404s for built assets and routing.

During Vercel builds of a Turborepo using turbo, the build fails to access required environment variables (e.g., DATABASE_URL) even though they are set in the Vercel dashboard. Locally, values from .env.local work, but CI/build cannot find them.

Deploying to Vercel fails to apply the desired npm install flags (e.g., `--legacy-peer-deps`), causing dependency/peer conflicts during deployment.

In the Next.js app, the `wordGroups` state update works in `npm run dev` but does not trigger in production after `npm run build` and `npm run start`, so dependent `useEffect` hooks never run.

set `environment` different for every deployment. Outcome: check `window.location.href` for the subdomain.

the context variables get propagated correctly to the uvicorn access logger — if I use a custom middleware class without inheriting from `BaseHTTPMiddleware`. Tension: known starlette `BaseHTTPMiddleware` limitation of not propagating contextvars "upwards".

However my `ci.yml` workflow does. — Locally I am not facing any issues when building the project. Outcome: No need to change settings xml, because those packages are already public, it should download without any tokens.

Deployment fails silently when code includes azure-identity

Github Actions does not pick up "$env:COVERAGE%" — code coverage badge that should be a dynamic one. Tension: it does with "${{ env.COVERAGE }}%" here.

Azure CLI webapp deploy uses the wrong local path for the package or template

It still works out and deploys all green, yet no Function instances in the Azure Function show up. — our deployment script that used to build and deploy Azure Functions on GitHub Actions.

work perfectly fine on my local machine but fail consistently when executed in GitHub Actions — My setup involves a Next.js 14 app using the App Router, TypeScript, Playwright for testing, and GitHub Actions for CI. Outcome: download an HTML report saved in the last step in your CI.

New Azure project lacks a clear Bicep folder/template structure for multiple environments and resources

In GitHub Actions, the same workflow job cannot automatically use environment-specific context (e.g., vars) across multiple target environments. `vars.CLUSTER_URL` is not resolving unless the job specifies an `environment`.

deployed site shows default value from String.fromEnvironment — I deploy flutter web with `Github Actions` in `.github/workflows/workflow.yml`. Tension: However, deployed site shows default value from String.from. Outcome: String.fromEnvironment('SUPABASE_URL', defaultValue: "check1");.

GitHub Actions workflow fails to resolve the SonarQube host URL when using env.SONAR_HOST_STAGING_URL

Azure App Service shows empty Application Settings even though the deployed app reads configuration values

the problem would have been more obvious had the error message included the name of the bucket for which access is denied — The environment variable was defined locally, and so did not affect my local development machine - only the deployed instance was affected. Tension: a missing environment variable causing a default bucket name to be used. Outcome: I was not accessing the bucket that I thought.

these variables are not available — however when in production on azure. Tension: i cant figure out how to set them properly. Outcome: the only time the variables work is if i set them explicitly in next.config.

Need to use different next.config.js configurations for different environments (static/prod/dev), but next build has no --config option to select an alternate config file.

Copilot in VS Code is accessing or analyzing sensitive `.env` files, and attempts to disable it by adding `env`/`.env` to the disabled files/language list did not work because `.env` isn’t treated as a distinct language tag.

How should I protect sensitive variables from .env file? Tension: sensitive variables from .env file.

I tried to access the value using `ProcessInfo` but it did not work. — during API call. Tension: I have created a `.env` file where I have set the value of the key. Outcome: You can set Environment Variables for Xcode.

Not Found: /.env — running live in production on Azure VM. Tension: These look like someone is trying to scan my VM/app in order to find `.env` file, login credentials, etc.

Whether putting sensitive API keys in Next.js .env.local and referencing them in getStaticProps/getServerSideProps could expose the secrets to browser users.

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