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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Running the optional angular build migration installs incompatible version of @angular/build","articleBody":"### Command\n\nupdate\n\n### Is this a regression?\n\n- [ ] Yes, this behavior used to work in the previous version\n\n### The previous version in which this bug was not present was\n\n_No response_\n\n### Description\n\nRunning the optional migration after skipping the build migration during initial update incorrectly installs @angular/build v20 which is not compatible\n\n### Minimal Reproduction\n\nhttps://github.com/simhnna/angular-build-migration-demo/tree/8971afceeaf60bbe9fff4c9a2777b7711dcb095f\n\nRun `ng update @angular/cli --name=use-application-builder`\n\n```\nThe installed Angular CLI version is outdated.\nInstalling a temporary Angular CLI versioned 20.1.0 to perform the update.\nUsing package manager: npm\nCollecting installed dependencies...\nFound 22 dependencies.\n** Executing 'use-application-builder' of package '@angular/cli' **\n\n❯ Migrate application projects to the new build system.\n  Application projects that are using the '@angular-devkit/build-angular' package's 'browser' and/or 'browser-esbuild' builders will be migrated to use the new 'application' builder.\n  You can read more about this, including known issues and limitations, here: https://angular.dev/tools/cli/build-system-migration\n    The output location of the browser build has been updated from \"dist/project\" to \"dist/project/browser\". You might need to adjust your deployment pipeline or, as an alternative, set outputPath.browser to \"\" in order to maintain the previous functionality.\nUPDATE package.json (1032 bytes)\nUPDATE angular.json (2749 bytes)\n✔ Packages installed successfully.\n  Migration completed (2 files modified).\n```\n\nIt installs [`@angular/build@20`](https://github.com/simhnna/angular-build-migration-demo/blob/main/package.json#L26) because it uses @angular/cli@20 to run the update \n\n### Exception or Error\n\n```text\n\n```\n\n### Your Environment\n\n```text\n_                      _                 ____ _     ___\n    / \\   _ __   __ _ _   _| | __ _ _ __     / ___| |   |_ _|\n   / △ \\ | '_ \\ / _` | | | | |/ _` | '__|   | |   | |    | |\n  / ___ \\| | | | (_| | |_| | | (_| | |      | |___| |___ | |\n /_/   \\_\\_| |_|\\__, |\\__,_|_|\\__,_|_|       \\____|_____|___|\n                |___/\n    \n\nAngular CLI: 18.2.20\nNode: 22.17.0\nPackage Manager: npm 10.9.2\nOS: linux x64\n\nAngular: 18.2.13\n... animations, common, compiler, compiler-cli, core, forms\n... platform-browser, platform-browser-dynamic, router\n\nPackage                         Version\n---------------------------------------------------------\n@angular-devkit/architect       0.1802.20\n@angular-devkit/build-angular   18.2.20\n@angular-devkit/core            18.2.20\n@angular-devkit/schematics      18.2.20\n@angular/cli                    18.2.20\n@schematics/angular             18.2.20\nrxjs                            7.8.2\ntypescript                      5.4.5\nzone.js                         0.14.10\n```\n\n### Anything else relevant?\n\n_No response_","author":{"url":"https://github.com/simhnna","@type":"Person","name":"simhnna"},"datePublished":"2025-07-10T10:44:07.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/30696/angular-cli/issues/30696"}