My app works in dev mode but not in production

[Explosion-Scratch]

I'm not sure why this is, I don't have any dev mode sensing on inside the app that could change things, one example of an error that I'm getting is this:

Handling error:  [TypeError: Scalars.keys is not a function or its return value is not iterable] 500

Source code:

import { gql } from 'apollo-server-svelte-kit';
import Scalars from '@saeris/graphql-scalars';
import fs from 'fs';
import path from 'path';
import { mergeSchemas } from '@graphql-tools/schema';
import { stitchingDirectives } from '@graphql-tools/stitching-directives';
const { allStitchingDirectivesTypeDefs } = stitchingDirectives();
import RESOLVERS from '$db/resolvers.js';
import Any from '$db/types/Any.js';
import './schemas.js';

const typedefs_code = fs.readFileSync(path.resolve('.', 'static', 'typedefs.gql'));

const TYPEDEFS = gql`
	${allStitchingDirectivesTypeDefs}
	${typedefs_code}
`;

export default mergeSchemas({
	typeDefs: [...Scalars.keys(), TYPEDEFS],
	resolvers: { ...Scalars.values(), Any, ...RESOLVERS({ typedefs: TYPEDEFS }) }
});

But this doesn't happen when running pnpm dev. This goes for a lot of other errors as well, any time that I fix one, a new seemingly unrelated one pops up. How do I fix this?

[Explosion-Scratch]

Turned out to be the import of a non JS file within the @searis/graphql-scalars dependency