diff --git a/.github/workflows/build_scoped_rector_php70.yaml b/.github/workflows/build_scoped_rector_php70.yaml
index 0242dfd1ab09..c8f90ff7c3df 100644
--- a/.github/workflows/build_scoped_rector_php70.yaml
+++ b/.github/workflows/build_scoped_rector_php70.yaml
@@ -36,12 +36,6 @@ jobs:
             -   run: |
                     composer require composer/composer
                     composer install --no-dev --ansi
-                    composer config repositories.phpstan/phpstan-src vcs https://github.com/phpstan/phpstan-src
-                    composer config minimum-stability dev
-                    composer config prefer-stable true
-                    rm -rf vendor/phpstan/phpstan
-                    composer dump-autoload
-                    composer require phpstan/phpstan-src
 
             # 1. copy files to $NESTED_DIRECTORY directory Exclude the scoped/nested directories to prevent rsync from copying in a loop
             -  run: rsync --exclude rector-build-php70 -av * rector-build-php70 --quiet
@@ -84,6 +78,42 @@ jobs:
 
             -   run: cp -a rector-prefixed-downgraded-php70/. remote-repository-php70
 
+            -
+                name: Remove vendor/phpstan/phpstan
+                working-directory: remote-repository-php70
+                run: rm -rf vendor/phpstan/phpstan
+
+            -
+                name: Ensure autoload updated
+                working-directory: remote-repository-php70
+                run: composer dump-autoload
+
+            -
+                name: Register phpstan-src repo, set stability config
+                working-directory: remote-repository-php70
+                run: |
+                    composer config repositories.phpstan/phpstan-src vcs https://github.com/phpstan/phpstan-src
+                    composer config minimum-stability dev
+                    composer config prefer-stable true
+            -
+                name: Require phpstan-src with ignore platform as in PHP 7.0
+                working-directory: remote-repository-php70
+                run: composer require phpstan/phpstan-src --ignore-platform-reqs
+
+            -
+                name: Downgrade phpstan
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: 7.3
+                    coverage: none
+            -   run: sh build/downgrade-rector-php70.sh remote-repository-php70/vendor
+
+            -
+                name: Rollback composer.json
+                working-directory: remote-repository-php70
+                run: mv composer-move.json composer.json
+
+
             # 7. setup git
             -
                 working-directory: remote-repository-php70
diff --git a/build/target-repository-php70/composer-move.json b/build/target-repository-php70/composer-move.json
new file mode 100644
index 000000000000..0979bc9a5c3b
--- /dev/null
+++ b/build/target-repository-php70/composer-move.json
@@ -0,0 +1,16 @@
+{
+    "name": "rector/rector-prefixed-php70",
+    "description": "Prefixed and PHP 7.0 downgraded version of rector/rector",
+    "license": "MIT",
+    "bin": [
+        "bin/rector"
+    ],
+    "require": {
+        "php": "^7.0|^8.0"
+    },
+    "extra": {
+        "branch-alias": {
+            "dev-main": "0.10-dev"
+        }
+    }
+}