diff --git a/composer.json b/composer.json
index 9e15cd796..d98358638 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
     "wp-cli/site-health-command": "^1",
     "wp-cli/super-admin-command": "^2",
     "wp-cli/widget-command": "^2",
-    "wp-cli/wp-cli": "dev-main"
+    "wp-cli/wp-cli": "dev-copilot/fix-wp-config-not-file as 2.13.0"
   },
   "require-dev": {
     "roave/security-advisories": "dev-latest",
diff --git a/composer.lock b/composer.lock
index f5d46998e..561dea965 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "c2c06eaebfeb4c1884f044c795b98d19",
+    "content-hash": "cf347ae35fcca5cc06f9df9137a8ef01",
     "packages": [
         {
             "name": "composer/semver",
@@ -2668,16 +2668,16 @@
         },
         {
             "name": "wp-cli/wp-cli",
-            "version": "dev-main",
+            "version": "dev-copilot/fix-wp-config-not-file",
             "source": {
                 "type": "git",
                 "url": "https://github.com/wp-cli/wp-cli.git",
-                "reference": "4177cb58ca649407e390a264aa19577a4125fdfe"
+                "reference": "1cb029f93f9db640f4fe37b4416a272e749c214a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/wp-cli/wp-cli/zipball/4177cb58ca649407e390a264aa19577a4125fdfe",
-                "reference": "4177cb58ca649407e390a264aa19577a4125fdfe",
+                "url": "https://api.github.com/repos/wp-cli/wp-cli/zipball/1cb029f93f9db640f4fe37b4416a272e749c214a",
+                "reference": "1cb029f93f9db640f4fe37b4416a272e749c214a",
                 "shasum": ""
             },
             "require": {
@@ -2700,7 +2700,6 @@
                 "ext-readline": "Include for a better --prompt implementation",
                 "ext-zip": "Needed to support extraction of ZIP archives when doing downloads or updates"
             },
-            "default-branch": true,
             "bin": [
                 "bin/wp",
                 "bin/wp.bat"
@@ -2748,7 +2747,7 @@
                 "issues": "https://github.com/wp-cli/wp-cli/issues",
                 "source": "https://github.com/wp-cli/wp-cli"
             },
-            "time": "2026-05-21T20:19:24+00:00"
+            "time": "2026-05-25T09:33:09+00:00"
         },
         {
             "name": "wp-cli/wp-config-transformer",
@@ -9794,7 +9793,14 @@
             "time": "2025-02-09T18:58:54+00:00"
         }
     ],
-    "aliases": [],
+    "aliases": [
+        {
+            "package": "wp-cli/wp-cli",
+            "version": "dev-copilot/fix-wp-config-not-file",
+            "alias": "2.13.0",
+            "alias_normalized": "2.13.0.0"
+        }
+    ],
     "minimum-stability": "dev",
     "stability-flags": {
         "roave/security-advisories": 20,
diff --git a/features/bootstrap.feature b/features/bootstrap.feature
index b2ef01e7a..8024e37b4 100644
--- a/features/bootstrap.feature
+++ b/features/bootstrap.feature
@@ -81,3 +81,17 @@ Feature: Bootstrap WP-CLI
           Status: Inactive
       """
     And STDERR should be empty
+
+  Scenario: Mustache templates should be resolved correctly when PHAR is renamed without extension
+
+    Given an empty directory
+    And a new Phar with the same version
+    And I run `php {PHAR_PATH} core download`
+
+    When I run `cp {PHAR_PATH} wp-renamed`
+    And I run `php wp-renamed config create --dbname=wordpress --dbuser=user --dbpass=pass --skip-check`
+    Then STDOUT should contain:
+      """
+      Success: Generated 'wp-config.php' file.
+      """
+    And STDERR should be empty
diff --git a/php/boot-phar.php b/php/boot-phar.php
index e5f94a262..64fb7e948 100644
--- a/php/boot-phar.php
+++ b/php/boot-phar.php
@@ -10,7 +10,7 @@
 }
 
 // Store the path to the Phar early on for `Utils\phar-safe-path()` function.
-define( 'WP_CLI_PHAR_PATH', Phar::running( true ) );
+define( 'WP_CLI_PHAR_PATH', Phar::running( false ) );
 
 if ( file_exists( 'phar://wp-cli.phar/php/wp-cli.php' ) ) {
 	define( 'WP_CLI_ROOT', 'phar://wp-cli.phar' );