diff --git a/.changeset/orange-dolls-smell.md b/.changeset/orange-dolls-smell.md
new file mode 100644
index 0000000000..b63e3ab83b
--- /dev/null
+++ b/.changeset/orange-dolls-smell.md
@@ -0,0 +1,6 @@
+---
+"@sanity/cli-build": major
+"@sanity/cli": patch
+---
+
+Move compareDependencyVersions into cli-build package. This change cleans up an unused export getModuleUrl from cli-build.
diff --git a/packages/@sanity/cli-build/src/_exports/_internal/build.ts b/packages/@sanity/cli-build/src/_exports/_internal/build.ts
index d00a025ec0..e1acdcc498 100644
--- a/packages/@sanity/cli-build/src/_exports/_internal/build.ts
+++ b/packages/@sanity/cli-build/src/_exports/_internal/build.ts
@@ -3,13 +3,13 @@ export {buildStaticFiles} from '../../actions/build/buildStaticFiles.js'
 export {buildStudio} from '../../actions/build/buildStudio.js'
 export {checkRequiredDependencies} from '../../actions/build/checkRequiredDependencies.js'
 export {checkStudioDependencyVersions} from '../../actions/build/checkStudioDependencyVersions.js'
-export {getModuleUrl} from '../../actions/build/getAutoUpdatesImportMap.js'
 export {extendViteConfigWithUserConfig, getViteConfig} from '../../actions/build/getViteConfig.js'
 export {resolveVendorBuildConfig} from '../../actions/build/resolveVendorBuildConfig.js'
 export {writeSanityRuntime} from '../../actions/build/writeSanityRuntime.js'
 export {SANITY_CACHE_DIR} from '../../constants.js'
-export type {
-  CompareDependencyVersions,
-  CompareDependencyVersionsResult,
-  UnresolvedPrerelease,
+export {
+  compareDependencyVersions,
+  type CompareDependencyVersions,
+  type CompareDependencyVersionsResult,
+  type UnresolvedPrerelease,
 } from '../../util/compareDependencyVersions.js'
diff --git a/packages/@sanity/cli/src/util/__tests__/compareDependencyVersions.test.ts b/packages/@sanity/cli-build/src/util/__tests__/compareDependencyVersions.test.ts
similarity index 86%
rename from packages/@sanity/cli/src/util/__tests__/compareDependencyVersions.test.ts
rename to packages/@sanity/cli-build/src/util/__tests__/compareDependencyVersions.test.ts
index 1e6cb0a7e6..66bf38e24e 100644
--- a/packages/@sanity/cli/src/util/__tests__/compareDependencyVersions.test.ts
+++ b/packages/@sanity/cli-build/src/util/__tests__/compareDependencyVersions.test.ts
@@ -1,9 +1,9 @@
+import {mockRequest} from '@sanity/cli-test/mocks/cli-core/request'
 import {beforeEach, describe, expect, it, vi} from 'vitest'
 
-import {compareDependencyVersions} from '../compareDependencyVersions'
+import {compareDependencyVersions} from '../compareDependencyVersions.js'
 
 const mockReadPackageJson = vi.hoisted(() => vi.fn())
-const mockRequest = vi.hoisted(() => vi.fn())
 const mockGetLocalPackageVersion = vi.hoisted(() => vi.fn())
 
 vi.mock('@sanity/cli-core', async (importOriginal) => {
@@ -15,6 +15,8 @@ vi.mock('@sanity/cli-core', async (importOriginal) => {
   }
 })
 
+vi.mock('@sanity/cli-core/request', async () => import('@sanity/cli-test/mocks/cli-core/request'))
+
 const autoUpdatePackages = [
   {name: 'sanity', version: '1.0.0'},
   {name: '@sanity/vision', version: '1.0.0'},
@@ -25,18 +27,6 @@ const appAutoUpdatePackages = [
   {name: '@sanity/sdk', version: '1.0.0'},
 ]
 
-/** Helper to call compareDependencyVersions with the mock requester injected */
-function compare(
-  packages: {name: string; version: string}[],
-  workDir: string,
-  options: {appId?: string} = {},
-) {
-  return compareDependencyVersions(packages, workDir, {
-    ...options,
-    requester: mockRequest as never,
-  })
-}
-
 describe('compareDependencyVersions', () => {
   beforeEach(() => {
     vi.clearAllMocks()
@@ -58,7 +48,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(autoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(autoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([])
       expect(result.unresolvedPrerelease).toEqual([])
@@ -81,7 +71,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(autoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(autoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([
         {
@@ -108,7 +98,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(autoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(autoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([
         {
@@ -141,7 +131,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(autoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(autoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([
         {
@@ -169,7 +159,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(autoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(autoUpdatePackages, '/test/workdir')
 
       expect(mockReadPackageJson).toHaveBeenCalledTimes(1)
 
@@ -206,7 +196,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(appAutoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(appAutoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([])
       expect(result.unresolvedPrerelease).toEqual([])
@@ -229,7 +219,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(appAutoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(appAutoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([
         {
@@ -256,7 +246,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(appAutoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(appAutoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([
         {
@@ -289,7 +279,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(appAutoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(appAutoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([
         {
@@ -322,7 +312,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(appAutoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(appAutoUpdatePackages, '/test/workdir')
 
       expect(mockReadPackageJson).toHaveBeenCalledTimes(1)
 
@@ -351,9 +341,9 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      await expect(compare([{name: 'sanity', version: '3.40.0'}], '/test/workdir')).rejects.toThrow(
-        /Failed to fetch remote version for .+: getaddrinfo ENOTFOUND/,
-      )
+      await expect(
+        compareDependencyVersions([{name: 'sanity', version: '3.40.0'}], '/test/workdir'),
+      ).rejects.toThrow(/Failed to fetch remote version for .+: getaddrinfo ENOTFOUND/)
     })
 
     it("should throw when response is missing the 'x-resolved-version' header", async () => {
@@ -368,9 +358,9 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      await expect(compare([{name: 'sanity', version: '3.40.0'}], '/test/workdir')).rejects.toThrow(
-        "Missing 'x-resolved-version' header",
-      )
+      await expect(
+        compareDependencyVersions([{name: 'sanity', version: '3.40.0'}], '/test/workdir'),
+      ).rejects.toThrow("Missing 'x-resolved-version' header")
     })
 
     it('should throw when response has an unexpected HTTP status code', async () => {
@@ -386,9 +376,9 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      await expect(compare([{name: 'sanity', version: '3.40.0'}], '/test/workdir')).rejects.toThrow(
-        'Unexpected HTTP response: 500 Internal Server Error',
-      )
+      await expect(
+        compareDependencyVersions([{name: 'sanity', version: '3.40.0'}], '/test/workdir'),
+      ).rejects.toThrow('Unexpected HTTP response: 500 Internal Server Error')
     })
   })
 
@@ -409,7 +399,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(autoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(autoUpdatePackages, '/test/workdir')
 
       // Only sanity should be checked, @sanity/vision should be skipped entirely
       expect(mockRequest).toHaveBeenCalledTimes(1)
@@ -433,7 +423,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(autoUpdatePackages, '/test/workdir')
+      const result = await compareDependencyVersions(autoUpdatePackages, '/test/workdir')
 
       expect(result.mismatched).toEqual([
         {
@@ -460,9 +450,9 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      await expect(compare([{name: 'sanity', version: '3.40.0'}], '/test/workdir')).rejects.toThrow(
-        'Failed to parse installed version for sanity',
-      )
+      await expect(
+        compareDependencyVersions([{name: 'sanity', version: '3.40.0'}], '/test/workdir'),
+      ).rejects.toThrow('Failed to parse installed version for sanity')
     })
   })
 
@@ -480,7 +470,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      await compare([{name: 'sanity', version: '3.40.0'}], '/test/workdir')
+      await compareDependencyVersions([{name: 'sanity', version: '3.40.0'}], '/test/workdir')
 
       const url = mockRequest.mock.calls[0][0].url as string
       expect(url).toContain('/v1/modules/sanity/default/')
@@ -500,7 +490,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      await compare([{name: 'sanity', version: '3.40.0'}], '/test/workdir', {
+      await compareDependencyVersions([{name: 'sanity', version: '3.40.0'}], '/test/workdir', {
         appId: 'my-app-id',
       })
 
@@ -524,7 +514,10 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare([{name: 'sanity', version: '5.11.1-alpha.14'}], '/test/workdir')
+      const result = await compareDependencyVersions(
+        [{name: 'sanity', version: '5.11.1-alpha.14'}],
+        '/test/workdir',
+      )
 
       expect(result.mismatched).toEqual([])
       expect(result.unresolvedPrerelease).toEqual([{pkg: 'sanity', version: '5.11.1-alpha.14'}])
@@ -543,9 +536,9 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      await expect(compare([{name: 'sanity', version: '3.40.0'}], '/test/workdir')).rejects.toThrow(
-        'Failed to resolve remote version for sanity@3.40.0: package not found',
-      )
+      await expect(
+        compareDependencyVersions([{name: 'sanity', version: '3.40.0'}], '/test/workdir'),
+      ).rejects.toThrow('Failed to resolve remote version for sanity@3.40.0: package not found')
     })
 
     it('should correctly split resolvable and prerelease packages', async () => {
@@ -573,7 +566,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(
+      const result = await compareDependencyVersions(
         [
           {name: 'sanity', version: '5.11.1-alpha.14'},
           {name: '@sanity/vision', version: '3.40.0'},
@@ -607,7 +600,7 @@ describe('compareDependencyVersions', () => {
         version: '0.0.0',
       })
 
-      const result = await compare(
+      const result = await compareDependencyVersions(
         [
           {name: 'sanity', version: '5.11.1-alpha.14'},
           {name: '@sanity/vision', version: '5.11.1-beta.1'},
diff --git a/packages/@sanity/cli-build/src/util/compareDependencyVersions.d.ts b/packages/@sanity/cli-build/src/util/compareDependencyVersions.d.ts
deleted file mode 100644
index c64f196d03..0000000000
--- a/packages/@sanity/cli-build/src/util/compareDependencyVersions.d.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-export interface CompareDependencyVersions {
-  installed: string
-  pkg: string
-  remote: string
-}
-
-export interface UnresolvedPrerelease {
-  pkg: string
-  version: string
-}
-
-export interface CompareDependencyVersionsResult {
-  mismatched: Array<CompareDependencyVersions>
-  unresolvedPrerelease: Array<UnresolvedPrerelease>
-}
diff --git a/packages/@sanity/cli/src/util/compareDependencyVersions.ts b/packages/@sanity/cli-build/src/util/compareDependencyVersions.ts
similarity index 87%
rename from packages/@sanity/cli/src/util/compareDependencyVersions.ts
rename to packages/@sanity/cli-build/src/util/compareDependencyVersions.ts
index 6d50dd621f..71f66b65c3 100644
--- a/packages/@sanity/cli/src/util/compareDependencyVersions.ts
+++ b/packages/@sanity/cli-build/src/util/compareDependencyVersions.ts
@@ -1,15 +1,27 @@
 import path from 'node:path'
 
-import {
-  type CompareDependencyVersions,
-  type CompareDependencyVersionsResult,
-  getModuleUrl,
-  type UnresolvedPrerelease,
-} from '@sanity/cli-build/_internal/build'
 import {getLocalPackageVersion, readPackageJson} from '@sanity/cli-core'
 import {createRequester} from '@sanity/cli-core/request'
 import {coerce, eq, prerelease, parse as semverParse} from 'semver'
 
+import {getModuleUrl} from '../actions/build/getAutoUpdatesImportMap.js'
+
+export interface CompareDependencyVersions {
+  installed: string
+  pkg: string
+  remote: string
+}
+
+export interface UnresolvedPrerelease {
+  pkg: string
+  version: string
+}
+
+export interface CompareDependencyVersionsResult {
+  mismatched: Array<CompareDependencyVersions>
+  unresolvedPrerelease: Array<UnresolvedPrerelease>
+}
+
 const defaultRequester = createRequester({
   middleware: {httpErrors: false, promise: {onlyBody: false}},
 })
@@ -17,8 +29,6 @@ const defaultRequester = createRequester({
 interface CompareDependencyVersionsOptions {
   /** When provided, uses the app-specific module endpoint instead of the default endpoint. */
   appId?: string
-  /** Optional requester for dependency injection (primarily for testing). */
-  requester?: typeof defaultRequester
 }
 
 /**
@@ -46,7 +56,7 @@ interface CompareDependencyVersionsOptions {
 export async function compareDependencyVersions(
   packages: {name: string; version: string}[],
   workDir: string,
-  {appId, requester = defaultRequester}: CompareDependencyVersionsOptions = {},
+  {appId}: CompareDependencyVersionsOptions = {},
 ): Promise<CompareDependencyVersionsResult> {
   const manifest = await readPackageJson(path.join(workDir, 'package.json'), {
     skipSchemaValidation: true,
@@ -62,7 +72,7 @@ export async function compareDependencyVersions(
       continue
     }
 
-    const resolvedVersion = await getRemoteResolvedVersion(getModuleUrl(pkg, {appId}), requester)
+    const resolvedVersion = await getRemoteResolvedVersion(getModuleUrl(pkg, {appId}))
 
     if (resolvedVersion === null) {
       if (prerelease(pkg.version)) {
@@ -96,13 +106,10 @@ export async function compareDependencyVersions(
   return {mismatched, unresolvedPrerelease}
 }
 
-async function getRemoteResolvedVersion(
-  url: string,
-  request: typeof defaultRequester,
-): Promise<string | null> {
+async function getRemoteResolvedVersion(url: string): Promise<string | null> {
   let response
   try {
-    response = await request({
+    response = await defaultRequester({
       maxRedirects: 0,
       method: 'HEAD',
       url,
diff --git a/packages/@sanity/cli/src/actions/build/__tests__/buildApp.appIdWarning.test.ts b/packages/@sanity/cli/src/actions/build/__tests__/buildApp.appIdWarning.test.ts
index 8c05f15e72..72d69485a5 100644
--- a/packages/@sanity/cli/src/actions/build/__tests__/buildApp.appIdWarning.test.ts
+++ b/packages/@sanity/cli/src/actions/build/__tests__/buildApp.appIdWarning.test.ts
@@ -21,45 +21,25 @@ const FLAGS = {
 
 // Mock heavy dependencies to isolate appId warning logic
 // Paths are relative to the test file location (__tests__/)
-vi.mock('../../../util/warnAboutMissingAppId.js', () => ({
+vi.mock(import('../../../util/warnAboutMissingAppId.js'), () => ({
   warnAboutMissingAppId: mockWarnAboutMissingAppId,
 }))
 
-vi.mock('../../../util/appId.js', () => ({
+vi.mock(import('../../../util/appId.js'), () => ({
   getAppId: mockGetAppId,
 }))
 
-vi.mock('../../../util/compareDependencyVersions.js', () => ({
-  compareDependencyVersions: vi.fn().mockResolvedValue({mismatched: [], unresolvedPrerelease: []}),
-}))
-
-vi.mock('@sanity/cli-build/_internal/build', async (importOriginal) => {
-  const actual = await importOriginal<typeof import('@sanity/cli-build/_internal/build')>()
+vi.mock(import('@sanity/cli-build/_internal/build'), async (importOriginal) => {
+  const actual = await importOriginal()
   return {
     ...actual,
     buildApp: mockedBuildApp,
+    compareDependencyVersions: vi
+      .fn()
+      .mockResolvedValue({mismatched: [], unresolvedPrerelease: []}),
   }
 })
 
-vi.mock('@sanity/cli-core', async (importOriginal) => {
-  const actual = await importOriginal<typeof import('@sanity/cli-core')>()
-  return {
-    ...actual,
-    getCliTelemetry: vi.fn().mockReturnValue({
-      trace: vi.fn().mockReturnValue({complete: vi.fn(), log: vi.fn(), start: vi.fn()}),
-    }),
-    getLocalPackageVersion: vi.fn().mockResolvedValue('1.0.0'),
-    getTimer: vi.fn().mockReturnValue({end: vi.fn().mockReturnValue(0), start: vi.fn()}),
-    isInteractive: vi.fn().mockReturnValue(false),
-  }
-})
-
-vi.mock('@sanity/cli-core/ux', () => ({
-  confirm: vi.fn(),
-  logSymbols: {info: 'i', warning: '!'},
-  spinner: vi.fn(() => ({fail: vi.fn(), start: vi.fn().mockReturnThis(), succeed: vi.fn()})),
-}))
-
 // Import after mocks are set up
 const {buildApp} = await import('../buildApp.js')
 
diff --git a/packages/@sanity/cli/src/actions/build/__tests__/buildStudio.appIdWarning.test.ts b/packages/@sanity/cli/src/actions/build/__tests__/buildStudio.appIdWarning.test.ts
index e392355927..1943753131 100644
--- a/packages/@sanity/cli/src/actions/build/__tests__/buildStudio.appIdWarning.test.ts
+++ b/packages/@sanity/cli/src/actions/build/__tests__/buildStudio.appIdWarning.test.ts
@@ -3,7 +3,6 @@ import {afterEach, describe, expect, test, vi} from 'vitest'
 
 const mockWarnAboutMissingAppId = vi.hoisted(() => vi.fn())
 const mockGetAppId = vi.hoisted(() => vi.fn())
-const mockGetLocalPackageVersion = vi.hoisted(() => vi.fn())
 const mockBuildStudio = vi.hoisted(() =>
   vi.fn().mockImplementation((options) => {
     options.checkAppId()
@@ -22,46 +21,25 @@ const FLAGS = {
 
 // Mock heavy dependencies to isolate appId warning logic
 // Paths are relative to the test file location (__tests__/)
-vi.mock('../../../util/warnAboutMissingAppId.js', () => ({
+vi.mock(import('../../../util/warnAboutMissingAppId.js'), () => ({
   warnAboutMissingAppId: mockWarnAboutMissingAppId,
 }))
 
-vi.mock('../../../util/appId.js', () => ({
+vi.mock(import('../../../util/appId.js'), () => ({
   getAppId: mockGetAppId,
 }))
 
-vi.mock('../../../util/compareDependencyVersions.js', () => ({
-  compareDependencyVersions: vi.fn().mockResolvedValue({mismatched: [], unresolvedPrerelease: []}),
-}))
-
-vi.mock('@sanity/cli-build/_internal/build', async (importOriginal) => {
-  const actual = await importOriginal<typeof import('@sanity/cli-core')>()
+vi.mock(import('@sanity/cli-build/_internal/build'), async (importOriginal) => {
+  const actual = await importOriginal()
   return {
     ...actual,
     buildStudio: mockBuildStudio,
+    compareDependencyVersions: vi
+      .fn()
+      .mockResolvedValue({mismatched: [], unresolvedPrerelease: []}),
   }
 })
 
-vi.mock('@sanity/cli-core', async (importOriginal) => {
-  const actual = await importOriginal<typeof import('@sanity/cli-core')>()
-  return {
-    ...actual,
-    getCliTelemetry: vi.fn().mockReturnValue({
-      trace: vi.fn().mockReturnValue({complete: vi.fn(), log: vi.fn(), start: vi.fn()}),
-    }),
-    getLocalPackageVersion: mockGetLocalPackageVersion,
-    getTimer: vi.fn().mockReturnValue({end: vi.fn().mockReturnValue(0), start: vi.fn()}),
-    isInteractive: vi.fn().mockReturnValue(false),
-  }
-})
-
-vi.mock('@sanity/cli-core/ux', () => ({
-  confirm: vi.fn(),
-  logSymbols: {info: 'i', warning: '!'},
-  select: vi.fn(),
-  spinner: vi.fn(() => ({fail: vi.fn(), start: vi.fn().mockReturnThis(), succeed: vi.fn()})),
-}))
-
 // Import after mocks are set up
 const {buildStudio} = await import('../buildStudio.js')
 
diff --git a/packages/@sanity/cli/src/actions/build/buildApp.ts b/packages/@sanity/cli/src/actions/build/buildApp.ts
index 79dfbc7fcc..3c322196d0 100644
--- a/packages/@sanity/cli/src/actions/build/buildApp.ts
+++ b/packages/@sanity/cli/src/actions/build/buildApp.ts
@@ -1,8 +1,10 @@
-import {buildApp as internalBuildApp} from '@sanity/cli-build/_internal/build'
+import {
+  compareDependencyVersions,
+  buildApp as internalBuildApp,
+} from '@sanity/cli-build/_internal/build'
 import {resolveWorkbenchApp} from '@sanity/workbench-cli/build'
 
 import {getAppId} from '../../util/appId.js'
-import {compareDependencyVersions} from '../../util/compareDependencyVersions.js'
 import {warnAboutMissingAppId} from '../../util/warnAboutMissingAppId.js'
 import {determineBasePath} from './determineBasePath.js'
 import {type BuildOptions} from './types.js'
diff --git a/packages/@sanity/cli/src/actions/build/buildStudio.ts b/packages/@sanity/cli/src/actions/build/buildStudio.ts
index d3fcadaa9d..b6357bf2e5 100644
--- a/packages/@sanity/cli/src/actions/build/buildStudio.ts
+++ b/packages/@sanity/cli/src/actions/build/buildStudio.ts
@@ -1,8 +1,10 @@
-import {buildStudio as internalBuildStudio} from '@sanity/cli-build/_internal/build'
+import {
+  compareDependencyVersions,
+  buildStudio as internalBuildStudio,
+} from '@sanity/cli-build/_internal/build'
 import {resolveWorkbenchApp} from '@sanity/workbench-cli/build'
 
 import {getAppId} from '../../util/appId.js'
-import {compareDependencyVersions} from '../../util/compareDependencyVersions.js'
 import {determineIsApp} from '../../util/determineIsApp.js'
 import {getPackageManagerChoice} from '../../util/packageManager/packageManagerChoice.js'
 import {upgradePackages} from '../../util/packageManager/upgradePackages.js'
diff --git a/packages/@sanity/cli/src/actions/dev/servers/__tests__/startStudioDevServer.test.ts b/packages/@sanity/cli/src/actions/dev/servers/__tests__/startStudioDevServer.test.ts
index 0c8a06102a..043c6c54b4 100644
--- a/packages/@sanity/cli/src/actions/dev/servers/__tests__/startStudioDevServer.test.ts
+++ b/packages/@sanity/cli/src/actions/dev/servers/__tests__/startStudioDevServer.test.ts
@@ -42,13 +42,11 @@ vi.mock('../getDashboardAppUrl.js', () => ({
 vi.mock('@sanity/cli-build/_internal/build', () => ({
   checkRequiredDependencies: mockCheckRequiredDependencies,
   checkStudioDependencyVersions: mockCheckStudioDependencyVersions,
+  compareDependencyVersions: mockCompareDependencyVersions,
 }))
 vi.mock('../../../build/shouldAutoUpdate.js', () => ({
   shouldAutoUpdate: mockShouldAutoUpdate,
 }))
-vi.mock('../../../../util/compareDependencyVersions.js', () => ({
-  compareDependencyVersions: mockCompareDependencyVersions,
-}))
 vi.mock('../../../../util/appId.js', () => ({
   getAppId: mockGetAppId,
 }))
diff --git a/packages/@sanity/cli/src/actions/dev/servers/startStudioDevServer.ts b/packages/@sanity/cli/src/actions/dev/servers/startStudioDevServer.ts
index 9cb2e1648a..f2ac83d28d 100644
--- a/packages/@sanity/cli/src/actions/dev/servers/startStudioDevServer.ts
+++ b/packages/@sanity/cli/src/actions/dev/servers/startStudioDevServer.ts
@@ -3,6 +3,7 @@ import {styleText} from 'node:util'
 import {
   checkRequiredDependencies,
   checkStudioDependencyVersions,
+  compareDependencyVersions,
 } from '@sanity/cli-build/_internal/build'
 import {getLocalPackageVersion, isInteractive} from '@sanity/cli-core'
 import {confirm, logSymbols, spinner} from '@sanity/cli-core/ux'
@@ -13,7 +14,6 @@ import {startDevServer} from '../../../server/devServer.js'
 import {gracefulServerDeath} from '../../../server/gracefulServerDeath.js'
 import {getProjectById} from '../../../services/projects.js'
 import {getAppId} from '../../../util/appId.js'
-import {compareDependencyVersions} from '../../../util/compareDependencyVersions.js'
 import {getPackageManagerChoice} from '../../../util/packageManager/packageManagerChoice.js'
 import {upgradePackages} from '../../../util/packageManager/upgradePackages.js'
 import {shouldAutoUpdate} from '../../build/shouldAutoUpdate.js'
diff --git a/packages/@sanity/cli/test/integration/commands/build.app.test.ts b/packages/@sanity/cli/test/integration/commands/build.app.test.ts
index 4acc37a06a..846041cb81 100644
--- a/packages/@sanity/cli/test/integration/commands/build.app.test.ts
+++ b/packages/@sanity/cli/test/integration/commands/build.app.test.ts
@@ -12,8 +12,16 @@ const mockedSelect = vi.hoisted(() => vi.fn())
 const mockedCompareDependencyVersions = vi.hoisted(() => vi.fn())
 const mockedIsInteractive = vi.hoisted(() => vi.fn(() => true))
 
-vi.mock('@sanity/cli-core/ux', async (importOriginal) => {
-  const original = await importOriginal<typeof import('@sanity/cli-core/ux')>()
+vi.mock(import('@sanity/cli-build/_internal/build'), async (importOriginal) => {
+  const original = await importOriginal()
+  return {
+    ...original,
+    compareDependencyVersions: mockedCompareDependencyVersions,
+  }
+})
+
+vi.mock(import('@sanity/cli-core/ux'), async (importOriginal) => {
+  const original = await importOriginal()
   return {
     ...original,
     confirm: mockedConfirm,
@@ -21,12 +29,8 @@ vi.mock('@sanity/cli-core/ux', async (importOriginal) => {
   }
 })
 
-vi.mock('../../../src/util/compareDependencyVersions.js', () => ({
-  compareDependencyVersions: mockedCompareDependencyVersions,
-}))
-
-vi.mock('@sanity/cli-core', async (importOriginal) => {
-  const original = await importOriginal<typeof import('@sanity/cli-core')>()
+vi.mock(import('@sanity/cli-core'), async (importOriginal) => {
+  const original = await importOriginal()
   return {
     ...original,
     isInteractive: mockedIsInteractive,
diff --git a/packages/@sanity/cli/test/integration/commands/build.studio.test.ts b/packages/@sanity/cli/test/integration/commands/build.studio.test.ts
index 710429e80e..513f4e5325 100644
--- a/packages/@sanity/cli/test/integration/commands/build.studio.test.ts
+++ b/packages/@sanity/cli/test/integration/commands/build.studio.test.ts
@@ -14,16 +14,24 @@ const mockedCompareDependencyVersions = vi.hoisted(() => vi.fn())
 const mockedUpgradePackages = vi.hoisted(() => vi.fn())
 const mockedIsInteractive = vi.hoisted(() => vi.fn())
 
-vi.mock('@sanity/cli-core', async (importOriginal) => {
-  const original = await importOriginal<typeof import('@sanity/cli-core')>()
+vi.mock(import('@sanity/cli-build/_internal/build'), async (importOriginal) => {
+  const original = await importOriginal()
+  return {
+    ...original,
+    compareDependencyVersions: mockedCompareDependencyVersions,
+  }
+})
+
+vi.mock(import('@sanity/cli-core'), async (importOriginal) => {
+  const original = await importOriginal()
   return {
     ...original,
     isInteractive: mockedIsInteractive,
   }
 })
 
-vi.mock('@sanity/cli-core/ux', async (importOriginal) => {
-  const original = await importOriginal<typeof import('@sanity/cli-core/ux')>()
+vi.mock(import('@sanity/cli-core/ux'), async (importOriginal) => {
+  const original = await importOriginal()
   return {
     ...original,
     confirm: mockedConfirm,
@@ -31,11 +39,7 @@ vi.mock('@sanity/cli-core/ux', async (importOriginal) => {
   }
 })
 
-vi.mock('../../../src/util/compareDependencyVersions.js', () => ({
-  compareDependencyVersions: mockedCompareDependencyVersions,
-}))
-
-vi.mock('../../../src/util/packageManager/upgradePackages.js', () => ({
+vi.mock(import('../../../src/util/packageManager/upgradePackages.js'), () => ({
   upgradePackages: mockedUpgradePackages,
 }))
 
diff --git a/packages/@sanity/cli/test/integration/commands/dev.test.ts b/packages/@sanity/cli/test/integration/commands/dev.test.ts
index bd826ff5d4..3ded360354 100644
--- a/packages/@sanity/cli/test/integration/commands/dev.test.ts
+++ b/packages/@sanity/cli/test/integration/commands/dev.test.ts
@@ -3,14 +3,16 @@ import {createServer} from 'node:http'
 import {platform} from 'node:os'
 import {join} from 'node:path'
 
-import {checkRequiredDependencies} from '@sanity/cli-build/_internal/build'
+import {
+  checkRequiredDependencies,
+  compareDependencyVersions,
+} from '@sanity/cli-build/_internal/build'
 import {getProjectCliClient} from '@sanity/cli-core'
-import {confirm} from '@sanity/cli-core/ux'
 import {testCommand, testFixture} from '@sanity/cli-test'
+import {confirm as mockConfirm, spinner as mockSpinner} from '@sanity/cli-test/mocks/cli-core/ux'
 import {afterEach, describe, expect, test, vi} from 'vitest'
 
 import {DevCommand} from '../../../src/commands/dev.js'
-import {compareDependencyVersions} from '../../../src/util/compareDependencyVersions.js'
 import {getPackageManagerChoice} from '../../../src/util/packageManager/packageManagerChoice.js'
 import {upgradePackages} from '../../../src/util/packageManager/upgradePackages.js'
 import {closeServer, tryCloseServer} from '../../testUtils.js'
@@ -20,39 +22,30 @@ const mockGetDashboardAppURL = vi.hoisted(() =>
   vi.fn().mockResolvedValue('https://www.sanity.io/@test-org?dev=http%3A%2F%2Flocalhost%3A5340'),
 )
 
-vi.mock('../../../src/actions/dev/servers/getDashboardAppUrl.js', () => ({
+vi.mock(import('../../../src/actions/dev/servers/getDashboardAppUrl.js'), () => ({
   getDashboardAppURL: mockGetDashboardAppURL,
 }))
 
-vi.mock('../../../src/util/compareDependencyVersions.js', () => ({
-  compareDependencyVersions: vi.fn().mockResolvedValue({mismatched: [], unresolvedPrerelease: []}),
-}))
-
-vi.mock('../../../src/server/vite/plugin-typegen.js', () => ({
+vi.mock(import('../../../src/server/vite/plugin-typegen.js'), () => ({
   sanityTypegenPlugin: mockTypegenPlugin.mockReturnValue({
     name: 'sanity/typegen',
   }),
 }))
 
-vi.mock('@sanity/cli-build/_internal/build', async () => {
-  const actual = await vi.importActual<typeof import('@sanity/cli-build/_internal/build')>(
-    '@sanity/cli-build/_internal/build',
-  )
+vi.mock(import('@sanity/cli-build/_internal/build'), async () => {
+  const actual = await vi.importActual('@sanity/cli-build/_internal/build')
   return {
     ...actual,
     checkRequiredDependencies: vi.fn().mockResolvedValue({
       installedSanityVersion: '3.0.0',
     }),
+    compareDependencyVersions: vi
+      .fn()
+      .mockResolvedValue({mismatched: [], unresolvedPrerelease: []}),
   }
 })
 
-vi.mock('@sanity/cli-core/ux', async () => {
-  const actual = await vi.importActual<typeof import('@sanity/cli-core/ux')>('@sanity/cli-core/ux')
-  return {
-    ...actual,
-    confirm: vi.fn(),
-  }
-})
+vi.mock('@sanity/cli-core/ux', async () => import('@sanity/cli-test/mocks/cli-core/ux'))
 
 vi.mock('../../../src/util/packageManager/upgradePackages.js')
 vi.mock('../../../src/util/packageManager/packageManagerChoice.js')
@@ -68,7 +61,6 @@ vi.mock('@sanity/cli-core', async () => {
 
 const mockCheckRequiredDependencies = vi.mocked(checkRequiredDependencies)
 const mockCompareDependencyVersions = vi.mocked(compareDependencyVersions)
-const mockConfirm = vi.mocked(confirm)
 const mockUpgradePackages = vi.mocked(upgradePackages)
 const mockGetPackageManagerChoice = vi.mocked(getPackageManagerChoice)
 const mockGetProjectCliClient = vi.mocked(getProjectCliClient)
@@ -84,7 +76,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       const cwd = await testFixture('basic-app')
       process.cwd = () => cwd
 
-      const {error, result, stderr, stdout} = await testCommand(DevCommand, ['--port', '5333'], {
+      const {error, result, stdout} = await testCommand(DevCommand, ['--port', '5333'], {
         config: {root: cwd},
         mocks: {isInteractive: true},
       })
@@ -92,7 +84,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       if (error) throw error
       expect(stdout).toContain('Dev server started on port 5333')
       expect(stdout).toContain('View your app in the Sanity dashboard here:')
-      expect(stderr).toContain('Checking configuration files')
+      expect(mockSpinner).toHaveBeenCalledWith('Checking configuration files...')
       await tryCloseServer(result)
 
       expect(mockTypegenPlugin).not.toHaveBeenCalled()
@@ -116,7 +108,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       )
       await writeFile(configPath, modifiedConfig)
 
-      const {error, result, stderr, stdout} = await testCommand(DevCommand, ['--port', '5333'], {
+      const {error, result, stdout} = await testCommand(DevCommand, ['--port', '5333'], {
         config: {root: cwd},
         mocks: {isInteractive: true},
       })
@@ -124,7 +116,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       if (error) throw error
       expect(stdout).toContain('Dev server started on port 5333')
       expect(stdout).toContain('View your app in the Sanity dashboard here:')
-      expect(stderr).toContain('Checking configuration files')
+      expect(mockSpinner).toHaveBeenCalledWith('Checking configuration files...')
       await tryCloseServer(result)
 
       expect(mockTypegenPlugin).toHaveBeenCalledWith({
@@ -229,7 +221,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       const cwd = await testFixture('basic-studio')
       process.cwd = () => cwd
 
-      const {error, result, stderr, stdout} = await testCommand(DevCommand, ['--port', '5335'], {
+      const {error, result, stdout} = await testCommand(DevCommand, ['--port', '5335'], {
         config: {root: cwd},
         mocks: {isInteractive: true},
       })
@@ -240,7 +232,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       expect(stdout).toMatch(/vite@\d+\.\d+/)
       expect(stdout).toContain('ready in')
       expect(stdout).toContain('ms and running at http://localhost:5335')
-      expect(stderr).toContain('Checking configuration files')
+      expect(mockSpinner).toHaveBeenCalledWith('Checking configuration files...')
 
       await tryCloseServer(result)
     })
@@ -284,7 +276,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
         },
       } as never)
 
-      const {error, result, stderr, stdout} = await testCommand(
+      const {error, result, stdout} = await testCommand(
         DevCommand,
         ['--load-in-dashboard', '--port', '5340'],
         {
@@ -297,7 +289,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       expect(stdout).toContain('Dev server started on port 5340')
       expect(stdout).toContain('View your studio in the Sanity dashboard here:')
       expect(stdout).toContain('https://www.sanity.io/@test-org?dev=http%3A%2F%2Flocalhost%3A5340')
-      expect(stderr).toContain('Checking configuration files')
+      expect(mockSpinner).toHaveBeenCalledWith('Checking configuration files...')
 
       await tryCloseServer(result)
     })
@@ -364,7 +356,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       })
       mockConfirm.mockResolvedValueOnce(false) // User declines upgrade
 
-      const {error, result, stderr, stdout} = await testCommand(
+      const {error, result, stdout} = await testCommand(
         DevCommand,
         ['--auto-updates', '--port', '5346'],
         {
@@ -375,7 +367,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
       if (error) throw error
       // Check that the server started successfully with auto-updates flag
       expect(stdout).toMatch(/running at http:\/\/localhost:5346/)
-      expect(stderr).toContain('Checking configuration files')
+      expect(mockSpinner).toHaveBeenCalledWith('Checking configuration files...')
       await tryCloseServer(result)
     })
 
@@ -401,7 +393,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
         mostOptimal: 'npm',
       })
 
-      const {error, result, stderr, stdout} = await testCommand(
+      const {error, result, stdout} = await testCommand(
         DevCommand,
         ['--auto-updates', '--port', '5348'],
         {
@@ -412,7 +404,7 @@ describe('#dev', {timeout: (platform() === 'win32' ? 60 : 30) * 1000}, () => {
 
       if (error) throw error
       expect(stdout).toMatch(/running at http:\/\/localhost:5348/)
-      expect(stderr).toContain('Checking configuration files')
+      expect(mockSpinner).toHaveBeenCalledWith('Checking configuration files...')
 
       expect(mockUpgradePackages).toHaveBeenCalledWith(
         {
diff --git a/packages/@sanity/cli/test/integration/util/compareDependencyVersions.integration.test.ts b/packages/@sanity/cli/test/integration/util/compareDependencyVersions.integration.test.ts
index 11471742b0..f08a63df30 100644
--- a/packages/@sanity/cli/test/integration/util/compareDependencyVersions.integration.test.ts
+++ b/packages/@sanity/cli/test/integration/util/compareDependencyVersions.integration.test.ts
@@ -2,11 +2,10 @@ import {mkdtemp, rm, writeFile} from 'node:fs/promises'
 import {tmpdir} from 'node:os'
 import path from 'node:path'
 
+import {compareDependencyVersions} from '@sanity/cli-build/_internal/build'
 import {gt, valid} from 'semver'
 import {afterAll, beforeAll, describe, expect, it} from 'vitest'
 
-import {compareDependencyVersions} from '../../../src/util/compareDependencyVersions.js'
-
 describe('compareDependencyVersions (integration)', {timeout: 30_000}, () => {
   let workDir: string