package.json:

{
  "type": "module",
  "devDependencies": {
    "rollup": ">=2.0.6 <3",
    "rollup-plugin-thatworks": ">=1.0.3 <2"
  }
}

rollup.config.js:

import {shebang} from 'rollup-plugin-thatworks' // esm import
export default {input: 'rollup.config.js'}

Node.js: v13.6.0

Actual Behavior

yarn && yarn rollup --config
yarn install v1.21.1                                                                                           
warning package.json: No license field                                                                         
warning No license field                                                                                       
[1/4] 🔍  Resolving packages...                                                                                
success Already up-to-date.                                                                                    
✨  Done in 0.18s.
yarn run v1.21.1
warning package.json: No license field                                                                         
$ /opt/foxyboy/sw/pri/code-samples/rollup2/node_modules/.bin/rollup --config                                   
loaded rollup.config.js with warnings                                                                          
(!) Unused external imports                                                                                    
shebang imported from external module 'rollup-plugin-thatworks' but never used                                 
[!] Error: Must use import to load ES Module: /opt/foxyboy/sw/pri/code-samples/rollup2/node_modules/rollup-plugin-thatworks/lib/thatworks.js                                                                                  
require() of ES modules is not supported.                                                                      
require() of /opt/foxyboy/sw/pri/code-samples/rollup2/node_modules/rollup-plugin-thatworks/lib/thatworks.js from /opt/foxyboy/sw/pri/code-samples/rollup2/rollup.config.js is an ES module file as it is a .js file whose nearest parent package.json contains "type": "module" which defines all .js files in that package scope as ES modules.                                                                                                            
Instead rename thatworks.js to end in .cjs, change the requiring code to use import(), or remove "type": "module" from /opt/foxyboy/sw/pri/code-samples/rollup2/node_modules/rollup-plugin-thatworks/package.json.

    at Module._extensions..js (internal/modules/cjs/loader.js:1160:13)
    at Object.require.extensions. [as .js] (/opt/foxyboy/sw/pri/code-samples/rollup2/node_modules/rol
lup/dist/bin/rollup:1812:17)
    at Module.load (internal/modules/cjs/loader.js:993:32)
    at Function.Module._load (internal/modules/cjs/loader.js:892:14)
    at Module.require (internal/modules/cjs/loader.js:1033:19)
    at require (internal/modules/cjs/helpers.js:72:18)
    at Object. (/opt/foxyboy/sw/pri/code-samples/rollup2/rollup.config.js:5:1)
    at Module._compile (internal/modules/cjs/loader.js:1144:30)
    at Object.require.extensions. [as .js] (/opt/foxyboy/sw/pri/code-samples/rollup2/node_modules/rol
lup/dist/bin/rollup:1809:24)
    at Module.load (internal/modules/cjs/loader.js:993:32)

Expected Behavior

rollup 2.0.6 to be able to use import of ECMAScript modules in rollup.config.js per Node.js v12.0.0+

cause: rollup has an internal transpiler that converts import to require. Node.js ESM then fails