i'll just ask the question: i help maintain this out-of-tree package here https://git.afnix.fr/afnix/nix-zulip and somewhere between c58ada2eda15d0576e9a2ad74bd8f2318509a40f and 20075955deac2583bb12f07151c2df830ef346b4 of nixpkgs, the build started failing with this error despite nothing in this repository changing:

+ ./tools/webpack --quiet
[webpack-cli] Failed to load '/build/zulip/web/webpack.config.ts' config
[webpack-cli] ReferenceError: exports is not defined in ES module scope
    at file:///build/zulip/web/webpack.config.ts:3:23
    at ModuleJobSync.runSync (node:internal/modules/esm/module_job:450:37)
    at ModuleLoader.importSyncForRequire (node:internal/modules/esm/loader:429:47)
    at loadESMFromCJS (node:internal/modules/cjs/loader:1519:24)
    at Module._compile (node:internal/modules/cjs/loader:1670:5)
    at Module._compile (/build/zulip/node_modules/.pnpm/pirates@4.0.6/node_modules/pirates/lib/index.js:117:24)
    at node:internal/modules/cjs/loader:1820:10
    at Object.newLoader [as .ts] (/build/zulip/node_modules/.pnpm/pirates@4.0.6/node_modules/pirates/lib/index.js:121:7)
    at Module.load (node:internal/modules/cjs/loader:1423:32)
    at Function._load (node:internal/modules/cjs/loader:1246:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:235:24)
    at Module.require (node:internal/modules/cjs/loader:1445:12)
    at require (node:internal/modules/helpers:135:16)
    at WebpackCLI.tryRequireThenImport (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/webpack-cli.js:225:30)
    at loadConfigByPath (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/webpack-cli.js:1390:38)
    at WebpackCLI.loadConfig (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/webpack-cli.js:1490:44)
    at WebpackCLI.createCompiler (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/webpack-cli.js:1755:33)
    at WebpackCLI.runWebpack (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/webpack-cli.js:1851:31)
    at Command.<anonymous> (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/webpack-cli.js:920:32)
    at Command.listener [as _actionHandler] (/build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:542:17)
    at /build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1502:14
    at Command._chainOrCall (/build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1386:12)
    at Command._parseCommand (/build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1501:27)
    at /build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1265:27
    at Command._chainOrCall (/build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1386:12)
    at Command._dispatchSubcommand (/build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1261:25)
    at Command._parseCommand (/build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1457:19)
    at Command.parseAsync (/build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1092:16)
    at Command.<anonymous> (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/webpack-cli.js:1340:32)
    at Command.parseAsync (/build/zulip/node_modules/.pnpm/commander@12.1.0/node_modules/commander/lib/command.js:1092:5)
    at WebpackCLI.run (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/webpack-cli.js:1344:9)
    at runCLI (/build/zulip/node_modules/.pnpm/webpack-cli@6.0.1_webpack-dev-server@5.2.0_webpack@5.98.0/node_modules/webpack-cli/lib/bootstrap.js:8:9)

Subcommand of ./tools/update-prod-static failed with exit status 2: ./tools/webpack --quiet
Actual error output for the subcommand is just above this.

and i'm curious if anyone knows off the top of their head what this is about/how to fix it

I'm currently trying to update my PR with appium to v3, which means I need to generate a new package-lock.json file, which has all the hashes needed.
However, the dependency ajv seems to be the wrong version, which gives me errors when trying to run the project.

I'm currently doing something like:

git clone https://github.com/appium/appium.git
cd appium
git checkout appium@3.0.1
rm package-lock.json
npm install

I can see that the correct version is specified in the packages/appium/package.json, ... that doesn't seem to be used.

Version from the repo: https://github.com/appium/appium/blob/appium%403.0.1/package-lock.json#L4364-L4379
Version I produce: https://gist.github.com/eyJhb/9ec8d24275b1c96f5486feb1d7555ccf#file-package-lock-json-L4163-L4178

Error while trying to run appium

/nix/store/8zh927f5wq7h5nz8ma07wggcr0gbc6v7-appium-unwrapped-3.0.1/lib/node_modules/appium-monorepo/packages/appium/lib/schema/schema.js:257
      new Ajv({
      ^
TypeError: ajv_1.Ajv is not a constructor
    at Function._instantiateAjv (/nix/store/8zh927f5wq7h5nz8ma07wggcr0gbc6v7-appium-unwrapped-3.0.1/lib/node_modules/appium-monorepo/packages/appium/lib/schema/schema.js:257:7)
    at new AppiumSchema (/nix/store/8zh927f5wq7h5nz8ma07wggcr0gbc6v7-appium-unwrapped-3.0.1/lib/node_modules/appium-monorepo/packages/appium/lib/schema/schema.js:102:30)
    at Function.create (/nix/store/8zh927f5wq7h5nz8ma07wggcr0gbc6v7-appium-unwrapped-3.0.1/lib/node_modules/appium-monorepo/packages/appium/lib/schema/schema.js:114:24)
    at Object.<anonymous> (/nix/store/8zh927f5wq7h5nz8ma07wggcr0gbc6v7-appium-unwrapped-3.0.1/lib/node_modules/appium-monorepo/packages/appium/lib/schema/schema.js:663:35)
    at Module._compile (node:internal/modules/cjs/loader:1554:14)
    at Object..js (node:internal/modules/cjs/loader:1706:10)
    at Module.load (node:internal/modules/cjs/loader:1289:32)
    at Function._load (node:internal/modules/cjs/loader:1108:12)
    at TracingChannel.traceSync (node:diagnostics_channel:322:14)
    at wrapModuleLoad (node:internal/modules/cjs/loader:220:24)
    at Module.require (node:internal/modules/cjs/loader:1311:12)
    at require (node:internal/modules/helpers:136:16)
    at Object.<anonymous> (/nix/store/8zh927f5wq7h5nz8ma07wggcr0gbc6v7-appium-unwrapped-3.0.1/lib/node_modules/appium-monorepo/packages/appium/lib/config.js:10:1)
    at Module._compile (node:internal/modules/cjs/loader:1554:14)
    at Object..js (node:internal/modules/cjs/loader:1706:10)
    at Module.load (node:internal/modules/cjs/loader:1289:32)

Running npm install --workspaces in the latest docker node container, I get these warnings.

npm warn ERESOLVE overriding peer dependency
npm warn While resolving: @sidvind/better-ajv-errors@4.0.0
npm warn Found: ajv@8.17.1
npm warn node_modules/ajv
npm warn   overridden ajv@"8.17.1" (was "^8.0.0") from ajv-formats@3.0.1
npm warn   node_modules/ajv-formats
npm warn     ajv-formats@"3.0.1" from appium@3.0.1
npm warn     packages/appium
npm warn   1 more (appium)
npm warn
npm warn Could not resolve dependency:
npm warn peer overridden ajv@"8.17.1" (was "^7.0.0 || ^8.0.0") from @sidvind/better-ajv-errors@4.0.0
npm warn packages/appium/node_modules/@sidvind/better-ajv-errors
npm warn   @sidvind/better-ajv-errors@"4.0.0" from appium@3.0.1
npm warn   packages/appium

Might help some. God I hate npm/node

nix-shell -p nodejs lerna
lerna clean
rm package-lock.json
npm install --workspaces --package-lock-only --ignore-scripts

This seems to work. Fucking hell. Might not have cleaned everything up? Maybe?