Preview: `MODULE_UNPARSEABLE` when importing from `'@prismicio/next'`

[brunobely]

Google results are largely unhelpful here so thought I'd raise an issue - I just set up Prismic in a Turborepo by following these docs and am getting this error when trying to open a page preview in Prismic. I set up the <PrismicPreview /> component and everything else seems to run OK.

slicemachine:dev: [next]  ⨯ Error: Could not parse module '[project]/node_modules/.pnpm/next@15.1.0_react-dom@19.0.0_react@19.0.0__react@19.0.0/node_modules/next/dist/server/route-modules/app-route/vendored/contexts/router-context.js'
slicemachine:dev: [next]     at [project]/node_modules/.pnpm/next@15.1.0_react-dom@19.0.0_react@19.0.0__react@19.0.0/node_modules/next/dist/server/route-modules/app-route/vendored/contexts/router-context.js [app-route] (ecmascript) (.next/server/chunks/f0296_next_3bdd13._.js:13914:11)
slicemachine:dev: [next]     at [project]/node_modules/.pnpm/next@15.1.0_react-dom@19.0.0_react@19.0.0__react@19.0.0/node_modules/next/dist/client/router.js [app-route] (ecmascript) (.next/server/chunks/f0296_next_3bdd13._.js:14004:37)
slicemachine:dev: [next]     at [project]/node_modules/.pnpm/@prismicio+next@1.7.1_@prismicio+client@7.15.1_next@15.1.0_react-dom@19.0.0_react@19.0.0__react@19.0.0__react@19.0.0/node_modules/@prismicio/next/dist/PrismicPreview.js [app-route] (ecmascript) (.next/server/chunks/08b5e__pnpm_0cf084._.js:481:263)
slicemachine:dev: [next]     at [project]/node_modules/.pnpm/@prismicio+next@1.7.1_@prismicio+client@7.15.1_next@15.1.0_react-dom@19.0.0_react@19.0.0__react@19.0.0__react@19.0.0/node_modules/@prismicio/next/dist/index.js [app-route] (ecmascript) <exports> (.next/server/chunks/08b5e__pnpm_0cf084._.js:765:395)
slicemachine:dev: [next]     at [project]/node_modules/.pnpm/@prismicio+next@1.7.1_@prismicio+client@7.15.1_next@15.1.0_react-dom@19.0.0_react@19.0.0__react@19.0.0__react@19.0.0/node_modules/@prismicio/next/dist/index.js [app-route] (ecmascript) (.next/server/chunks/08b5e__pnpm_0cf084._.js:791:403)
slicemachine:dev: [next]     at [project]/apps/slicemachine/src/prismicio.ts [app-route] (ecmascript) (apps/slicemachine/src/prismicio.ts:2:0)
slicemachine:dev: [next]     at [project]/apps/slicemachine/src/app/api/preview/route.ts [app-route] (ecmascript) (apps/slicemachine/src/app/api/preview/route.ts:4:0)
slicemachine:dev: [next]     at Object.<anonymous> (.next/server/app/api/preview/route.js:10:26)
slicemachine:dev: [next]   1 | import * as prismic from '@prismicio/client';
slicemachine:dev: [next] > 2 | import * as prismicNext from '@prismicio/next';
slicemachine:dev: [next]   3 | import config from '../slicemachine.config.json';
slicemachine:dev: [next]   4 |
slicemachine:dev: [next]   5 | /** {
slicemachine:dev: [next]   code: 'MODULE_UNPARSEABLE',
slicemachine:dev: [next]   page: '/api/preview'

Any ideas how I could debug this?

Here are the relevant package versions:

  dependencies
    "@prismicio/client": "^7.15.1",
    "@prismicio/next": "^1.7.1",
    "@prismicio/react": "^2.9.1",
    "next": "^15.1.0",
    "react": "^19",
    "react-dom": "^19.0.0"

  devDependencies
    "@slicemachine/adapter-next": "^0.3.65",
    "slice-machine-ui": "^2.12.2",
    "typescript": "^5.6.3"

[github-actions]

This issue has been labeled as a bug since it was created using the 🚨 Bug Report Template.

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