diff --git a/src/SPC/builder/linux/LinuxBuilder.php b/src/SPC/builder/linux/LinuxBuilder.php
index 3525ffb7e..91910f7f3 100644
--- a/src/SPC/builder/linux/LinuxBuilder.php
+++ b/src/SPC/builder/linux/LinuxBuilder.php
@@ -170,12 +170,19 @@ public function testPHP(int $build_target = BUILD_TARGET_NONE)
      */
     protected function buildCli(): void
     {
+        if ($this->getExt('readline')) {
+            SourcePatcher::patchFile('musl_static_readline.patch', SOURCE_PATH . '/php-src');
+        }
         $vars = SystemUtil::makeEnvVarString($this->getMakeExtraVars());
         $SPC_CMD_PREFIX_PHP_MAKE = getenv('SPC_CMD_PREFIX_PHP_MAKE') ?: 'make';
         shell()->cd(SOURCE_PATH . '/php-src')
             ->exec('sed -i "s|//lib|/lib|g" Makefile')
             ->exec("{$SPC_CMD_PREFIX_PHP_MAKE} {$vars} cli");
 
+        if ($this->getExt('readline')) {
+            SourcePatcher::patchFile('musl_static_readline.patch', SOURCE_PATH . '/php-src', true);
+        }
+
         if (!$this->getOption('no-strip', false)) {
             shell()->cd(SOURCE_PATH . '/php-src/sapi/cli')->exec('strip --strip-unneeded php');
         }
diff --git a/src/SPC/builder/unix/library/ncurses.php b/src/SPC/builder/unix/library/ncurses.php
index 3899e5597..27725c3d5 100644
--- a/src/SPC/builder/unix/library/ncurses.php
+++ b/src/SPC/builder/unix/library/ncurses.php
@@ -38,7 +38,7 @@ protected function build(): void
             ->make();
         $final = FileSystem::scanDirFiles(BUILD_BIN_PATH, relative: true);
         // Remove the new files
-        $new_files = array_diff($final, $filelist);
+        $new_files = array_diff($final, $filelist ?: []);
         foreach ($new_files as $file) {
             @unlink(BUILD_BIN_PATH . '/' . $file);
         }
diff --git a/src/globals/patch/musl_static_readline.patch b/src/globals/patch/musl_static_readline.patch
new file mode 100644
index 000000000..196116217
--- /dev/null
+++ b/src/globals/patch/musl_static_readline.patch
@@ -0,0 +1,26 @@
+diff --git a/ext/readline/readline_cli.c b/ext/readline/readline_cli.c
+index 31212999..d80a21c3 100644
+--- a/ext/readline/readline_cli.c
++++ b/ext/readline/readline_cli.c
+@@ -739,8 +739,8 @@ typedef cli_shell_callbacks_t *(__cdecl *get_cli_shell_callbacks)(void);
+ 	} while(0)
+ 
+ #else
+-/*
+ #ifdef COMPILE_DL_READLINE
++/*
+ This dlsym() is always used as even the CGI SAPI is linked against "CLI"-only
+ extensions. If that is being changed dlsym() should only be used when building
+ this extension sharedto offer compatibility.
+@@ -754,9 +754,9 @@ this extension sharedto offer compatibility.
+ 			(cb) = get_callbacks(); \
+ 		} \
+ 	} while(0)
+-/*#else
++#else
+ #define GET_SHELL_CB(cb) (cb) = php_cli_get_shell_callbacks()
+-#endif*/
++#endif
+ #endif
+ 
+ PHP_MINIT_FUNCTION(cli_readline)
diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index 764cfc7d3..8358d26fe 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -50,7 +50,7 @@
 
 // If you want to test your added extensions and libs, add below (comma separated, example `bcmath,openssl`).
 $extensions = match (PHP_OS_FAMILY) {
-    'Linux', 'Darwin' => 'bcmath',
+    'Linux', 'Darwin' => 'readline',
     'Windows' => 'bcmath,bz2,calendar,ctype,curl,dom,exif,fileinfo,filter,ftp,iconv,xml,mbstring,mbregex,mysqlnd,openssl,pdo,pdo_mysql,pdo_sqlite,phar,session,simplexml,soap,sockets,sqlite3,tokenizer,xmlwriter,xmlreader,zlib,zip',
 };