diff --git a/antora-playbook.yml b/antora-playbook.yml
index 839ae5643d..35f35f3f68 100644
--- a/antora-playbook.yml
+++ b/antora-playbook.yml
@@ -1,12 +1,12 @@
 antora:
   extensions:
-  - ./lib/antora/extensions/autoconfig-partial-build.js
+  - '@springio/antora-extensions/partial-build-extension'
   - ./lib/antora/extensions/inject-collector-config.js
   - '@antora/collector-extension'
   - ./lib/antora/extensions/version-fix.js
   - '@antora/atlas-extension'
   - '@opendevise/antora-release-line-extension'
-  - require: '@springio/asciidoctor-extensions/tabs-migration-antora-extension'
+  - require: '@springio/antora-extensions/tabs-migration-extension'
     # uncomment this option to save the migrated content to the worktree
     #save_result: true
     unwrap_example_block: always
diff --git a/build.gradle b/build.gradle
index c60f2c3b09..c42383c647 100644
--- a/build.gradle
+++ b/build.gradle
@@ -16,6 +16,7 @@ antora {
 		'@antora/collector-extension': '1.0.0-alpha.2',
 		'@asciidoctor/tabs': '1.0.0-alpha.11',
 		'@opendevise/antora-release-line-extension': '1.0.0-alpha.2',
-		'@springio/asciidoctor-extensions': '1.0.0-alpha.4',
+		'@springio/antora-extensions': '1.0.0-alpha.2',
+		'@springio/asciidoctor-extensions': '1.0.0-alpha.7',
 	]
 }
diff --git a/lib/antora/extensions/autoconfig-partial-build.js b/lib/antora/extensions/autoconfig-partial-build.js
deleted file mode 100644
index b81d32bdcf..0000000000
--- a/lib/antora/extensions/autoconfig-partial-build.js
+++ /dev/null
@@ -1,57 +0,0 @@
-'use strict'
-
-const execFile = require('node:util').promisify(require('node:child_process').execFile)
-const fsp = require('node:fs/promises')
-const ospath = require('node:path')
-
-module.exports.register = function () {
-  if (!process.env.BUILD_REFNAME) return
-
-  this.once('playbookBuilt', async ({ playbook }) => {
-    const { concat: get } = this.require('simple-get')
-    const asciidocAttrs = ((playbook.asciidoc ||= {}).attributes ||= {})
-    const siteManifestUrl = asciidocAttrs['primary-site-manifest-url'] || `${playbook.site.url}/site-manifest.json`
-    const siteManifestData = await (siteManifestUrl.startsWith('https://')
-      ? download(get, siteManifestUrl)
-      : fsp.readFile(siteManifestUrl)
-    ).then(JSON.parse)
-    let { BUILD_REFNAME: refname, BUILD_VERSION: version } = process.env
-    const isBranch = /[a-z]$/.test(refname)
-    if (!version) {
-      const repoUrl = await execFile('git', ['remote', 'get-url', 'origin']).then(({ stdout: output }) => output.trim())
-      const propertiesUrl = `${repoUrl.replace('github.com', 'raw.githubusercontent.com')}/${refname}/gradle.properties`
-      version = await download(get, propertiesUrl)
-        .then((contents) => contents.toString().split('\n').find((it) => it.startsWith('version='))?.slice(8))
-    }
-    if (isBranch && version.endsWith('-SNAPSHOT')) version = version.slice(0, -9)
-    const versionsInManifest = siteManifestData.components.ROOT.versions
-    if (!(version in versionsInManifest && isBranch === !!versionsInManifest[version].prerelease)) {
-      const category = require('path').basename(module.id, '.js')
-      await fsp.writeFile(ospath.join(playbook.dir, '.full-build'), '')
-      console.log(`version ${version} not previously built; reverting to full build`)
-      return
-    }
-    Object.assign(
-      playbook.content.sources[0],
-      isBranch ? { branches: [refname], tags: [] } : { branches: [], tags: [refname] }
-    )
-    Object.assign(
-      asciidocAttrs,
-      { 'primary-site-url': '.', 'primary-site-manifest-url': siteManifestUrl }
-    )
-    this.updateVariables({ playbook })
-  })
-}
-
-function download (get, url) {
-  return new Promise((resolve, reject) =>
-    get({ url }, (err, response, contents) => {
-      if (err) reject(err)
-      if (response.statusCode !== 200) {
-        const message = `Response code ${response.statusCode} (${response.statusMessage})`
-        return reject(Object.assign(new Error(message), { name: 'HTTPError' }))
-      }
-      resolve(contents)
-    })
-  )
-}