diff --git a/.github/build-packages.php b/.github/build-packages.php
index d69a3c8198ec0..dda58049ab842 100644
--- a/.github/build-packages.php
+++ b/.github/build-packages.php
@@ -1,5 +1,9 @@
 <?php
 
+require __DIR__.'/vendor/autoload.php';
+
+use Composer\MetadataMinifier\MetadataMinifier;
+
 if (3 > $_SERVER['argc']) {
     echo "Usage: branch version dir1 dir2 ... dirN\n";
     exit(1);
@@ -52,11 +56,23 @@
 
     $packages[$package->name][$package->version] = $package;
 
-    $versions = @file_get_contents('https://repo.packagist.org/p/'.$package->name.'.json') ?: sprintf('{"packages":{"%s":{"%s":%s}}}', $package->name, $package->version, file_get_contents($dir.'/composer.json'));
-    $versions = json_decode($versions)->packages->{$package->name};
+    if (false !== $taggedReleases = @file_get_contents('https://repo.packagist.org/p2/'.$package->name.'.json')) {
+        $versions = MetadataMinifier::expand(json_decode($taggedReleases, true)['packages'][$package->name]);
+
+        foreach ($versions as $v => $p) {
+            $packages[$package->name] += [$v => $p];
+        }
+    }
+
+    if (false !== $devReleases = @file_get_contents('https://repo.packagist.org/p2/'.$package->name.'~dev.json')) {
+        $versions = MetadataMinifier::expand(json_decode($taggedReleases, true)['packages'][$package->name]);
+    } else {
+        $versions = sprintf('{"packages":{"%s":{"%s":%s}}}', $package->name, $package->version, file_get_contents($dir.'/composer.json'));
+        $versions = json_decode($versions, true)['packages'][$package->name];
+    }
 
-    foreach ($versions as $v => $package) {
-        $packages[$package->name] += [$v => $package];
+    foreach ($versions as $v => $p) {
+        $packages[$package->name] += [$v => $p];
     }
 }
 
diff --git a/.github/composer.json b/.github/composer.json
new file mode 100644
index 0000000000000..5bd3935482174
--- /dev/null
+++ b/.github/composer.json
@@ -0,0 +1,5 @@
+{
+    "require": {
+        "composer/metadata-minifier": "^1.0"
+    }
+}
diff --git a/.github/workflows/unit-tests.yml b/.github/workflows/unit-tests.yml
index 8e4c8516dad81..a8b46ce823cc0 100644
--- a/.github/workflows/unit-tests.yml
+++ b/.github/workflows/unit-tests.yml
@@ -92,12 +92,18 @@ jobs:
 
           # Create local composer packages for each patched components and reference them in composer.json files when cross-testing components
           if [[ ! "${{ matrix.mode }}" = *-deps ]]; then
-              php .github/build-packages.php HEAD^ $SYMFONY_VERSION src/Symfony/Bridge/PhpUnit
+              cd .github
+              composer install
+              php ./build-packages.php HEAD^ $SYMFONY_VERSION src/Symfony/Bridge/PhpUnit
+              cd ..
           else
             echo SYMFONY_DEPRECATIONS_HELPER=weak >> $GITHUB_ENV
             cp composer.json composer.json.orig
             echo -e '{\n"require":{'"$(grep phpunit-bridge composer.json)"'"php":"*"},"minimum-stability":"dev"}' > composer.json
-            php .github/build-packages.php HEAD^ $SYMFONY_VERSION $(find src/Symfony -mindepth 2 -type f -name composer.json -printf '%h\n' | grep -v src/Symfony/Component/Intl/Resources/emoji)
+            cd .github
+            composer install
+            php ./build-packages.php HEAD^ $SYMFONY_VERSION $(find src/Symfony -mindepth 2 -type f -name composer.json -printf '%h\n' | grep -v src/Symfony/Component/Intl/Resources/emoji)
+            cd ..
             mv composer.json composer.json.phpunit
             mv composer.json.orig composer.json
           fi