diff --git a/.github/workflows/registry-ci.yml b/.github/workflows/registry-ci.yml
index 92e0d7162..bf7d8cebc 100644
--- a/.github/workflows/registry-ci.yml
+++ b/.github/workflows/registry-ci.yml
@@ -36,17 +36,45 @@ jobs:
 
     steps:
       - name: Checkout (only for workflow files)
-        uses: actions/checkout@v4
-
-      - name: Setup PHP (recommended approach)
-        uses: shivammathur/setup-php@v2
-        with:
-          php-version: ${{ matrix.php }}
-          tools: composer:v2
-          coverage: none
-          extensions: >
-            mbstring, json, openssl, intl, ldap, xml, zlib, sodium,
-            pdo, pdo_mysql, pdo_pgsql, gd, xsl, memcached, pcntl, posix
+        shell: bash
+        run: |
+          set -euxo pipefail
+          git clone \
+            --depth=1 \
+            --branch "${GITHUB_REF_NAME}" \
+            "${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}.git" \
+            "${GITHUB_WORKSPACE}"
+
+      - name: Install PHP ${{ matrix.php }} and extensions
+        shell: bash
+        run: |
+          set -euxo pipefail
+          sudo apt-get update
+          sudo apt-get install -y --no-install-recommends \
+            software-properties-common ca-certificates gnupg
+          sudo add-apt-repository -y ppa:ondrej/php
+          sudo apt-get update
+          PHP_VER="${{ matrix.php }}"
+          sudo apt-get install -y --no-install-recommends \
+            php${PHP_VER}-cli \
+            php${PHP_VER}-mbstring \
+            php${PHP_VER}-json \
+            php${PHP_VER}-openssl \
+            php${PHP_VER}-intl \
+            php${PHP_VER}-ldap \
+            php${PHP_VER}-xml \
+            php${PHP_VER}-zip \
+            php${PHP_VER}-sodium \
+            php${PHP_VER}-pdo \
+            php${PHP_VER}-mysql \
+            php${PHP_VER}-pgsql \
+            php${PHP_VER}-gd \
+            php${PHP_VER}-xsl \
+            php${PHP_VER}-memcached \
+            php${PHP_VER}-pcntl \
+            php${PHP_VER}-posix \
+            php${PHP_VER}-curl
+          sudo update-alternatives --set php /usr/bin/php${PHP_VER}
 
       - name: Compute COMANAGE_REGISTRY_SRC_URL
         shell: bash