This is what I got

pnpm install --offline --ignore-scripts '' --frozen-lockfile

I assume the random empty string is the culprit

    # NOTE: this hash changes whenever pnpm lock changes
    # TODO: update this automatically in CI and/or pre-commit

Another opportunity for me to mention my importPnpmLock.nix library (GitHub mirror)

It's similar to importCargoLock, importNpmLock and others from Nixpkgs, though this one sadly only works using IFD, as your pnpm-lock.yaml has to be converted to json first.

I have been using it at my workplace to build and package our Node apps using Nix. Without it, I wouldn't really be able to use Renovate bot very comfortably

The configure phase seems to be working now (pushed), thanks for the help!

Now, two of build steps are failing.

One of them (@vortex/main:download-duckdb-extensions) seems to be a "download" script, so no surprise there. Maybe I can run it in a separate FOD? Or download the same files manually and populate a cache directory?

https://github.com/Nexus-Mods/Vortex/blob/master/src/main/download-duckdb-extensions.ts

The other one (theme-switcher:build) I'm not sure of. It's package.json has:

  "scripts": {
    "_assets": "copyfiles themes/**/* dist && copyfiles -f src/theme_switcher.scss dist",
    "_native": "node ../copy-native.mjs -u 4 ./node_modules/font-scanner/build/Release/fontmanager.node",
    "build": "node build.mjs && pnpm run _assets && pnpm run _native && pnpm extractInfo",
    "typecheck": "pnpm tsc"
  },

https://github.com/Nexus-Mods/Vortex/blob/master/extensions/theme-switcher/build.mjs

The configure phase seems to be working now (pushed), thanks for the help!

Now, two of build steps are failing.

One of them (@vortex/main:download-duckdb-extensions) seems to be a "download" script, so no surprise there. Maybe I can run it in a separate FOD? Or download the same files manually and populate a cache directory?

https://github.com/Nexus-Mods/Vortex/blob/master/src/main/download-duckdb-extensions.ts

EDIT: The first one I've worked-around with a fixed-output-derivation, but really needs upstream refactoring to improve how they fetch duckdb-extensions. The second one needed node-gyp to build a transitive dependency, oddly, I needed to run node-gyp manually in buildPhase.
The other one (theme-switcher:build) I'm not sure of. It's package.json has:

  "scripts": {
    "_assets": "copyfiles themes/**/* dist && copyfiles -f src/theme_switcher.scss dist",
    "_native": "node ../copy-native.mjs -u 4 ./node_modules/font-scanner/build/Release/fontmanager.node",
    "build": "node build.mjs && pnpm run _assets && pnpm run _native && pnpm extractInfo",
    "typecheck": "pnpm tsc"
  },

https://github.com/Nexus-Mods/Vortex/blob/master/extensions/theme-switcher/build.mjs

The configure phase seems to be working now (pushed), thanks for the help!

Now, two of build steps are failing.

One of them (@vortex/main:download-duckdb-extensions) seems to be a "download" script, so no surprise there. Maybe I can run it in a separate FOD? Or download the same files manually and populate a cache directory?

https://github.com/Nexus-Mods/Vortex/blob/master/src/main/download-duckdb-extensions.ts

EDIT: The first one I've worked-around with a fixed-output-derivation, but really needs upstream refactoring to improve how they fetch duckdb-extensions. The second one needed node-gyp to build a transitive dependency, oddly, I needed to run node-gyp manually in buildPhase.
The other one (theme-switcher:build) I'm not sure of. It's package.json has:

  "scripts": {
    "_assets": "copyfiles themes/**/* dist && copyfiles -f src/theme_switcher.scss dist",
    "_native": "node ../copy-native.mjs -u 4 ./node_modules/font-scanner/build/Release/fontmanager.node",
    "build": "node build.mjs && pnpm run _assets && pnpm run _native && pnpm extractInfo",
    "typecheck": "pnpm tsc"
  },

https://github.com/Nexus-Mods/Vortex/blob/master/extensions/theme-switcher/build.mjs

EDIT: The first one I've worked-around with a fixed-output-derivation, but really needs upstream refactoring to improve how they fetch duckdb-extensions. The second one needed node-gyp to build a transitive dependency, oddly, I needed to run node-gyp manually in buildPhase.