As noted in #2978, the temporary workarounds would be:

webpack.config.js

  plugins: [
    new webpack.IgnorePlugin({
      resourceRegExp: /^cloudflare:sockets$/,
    }),
  ],

next.config.ts

  webpack: (config, { webpack }) => {
    config.plugins.push(
      new webpack.IgnorePlugin({
        resourceRegExp: /^cloudflare:sockets$/,
      }),
    );
    return config;
  },

hmmm thanks for the info! Any idea on the right fix here? I wonder if I should write a test by trying to webpackify everything in a separate module in the repo & see if it works?

@brianc If you are okay with the conditional exports as the previous version, how about using nested conditions? Something like:

  "exports": {
    ".": {
      "cloudflare": {
        "import": "./esm/index.mjs",
        "require": "./dist/index.js",
      }
      "default": "./dist/empty.js"
    }
  },

And users of Cloudflare Workers need to explicitly enable the conditions in their webpack configs.

Or another option might be move (to dev)/remove the dependency pg-cloudflare, and users need to explicitly add it as a dependency in their package.json.