Fixed issue where getInstallPath can return a relative path in rare c…

…ases.

src/Plugin.php

@@ -13,6 +13,7 @@
 use function dirname;
 use function file_exists;
 use function file_put_contents;
+use function getcwd;
 use function in_array;
 use function is_file;
 use function ksort;
@@ -21,6 +22,7 @@
 use function sprintf;
 use function strpos;
 use function var_export;
+use const DIRECTORY_SEPARATOR;
 
 final class Plugin implements PluginInterface, EventSubscriberInterface
 {
@@ -116,7 +118,13 @@ public function process(Event $event): void
 				}
 				continue;
 			}
-			$absoluteInstallPath = $installationManager->getInstallPath($package);
+
+			$installPath = $installationManager->getInstallPath($package);
+
+			$absoluteInstallPath = $fs->isAbsolutePath($installPath)
+				? $installPath
+				: getcwd() . DIRECTORY_SEPARATOR . $installPath;
+
 			$data[$package->getName()] = [
 				'install_path' => $absoluteInstallPath,
 				'relative_install_path' => $fs->findShortestPath(dirname($generatedConfigFilePath), $absoluteInstallPath, true),