diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 28336e92..b88c7bf4 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -143,7 +143,7 @@ jobs:
         run: |
           bash build_darwin_libs.sh
           mkdir -p output
-          cp build/Release/libpocketpy.a output/libpocketpy.a
+          cp build/libpocketpy.a output/libpocketpy.a
       - uses: actions/upload-artifact@v4
         with:
           name: darwin
diff --git a/build_darwin_libs.sh b/build_darwin_libs.sh
index 61f442fc..dbc765a4 100644
--- a/build_darwin_libs.sh
+++ b/build_darwin_libs.sh
@@ -15,3 +15,5 @@ FLAGS="-DPK_BUILD_STATIC_LIB=ON \
 
 cmake -G Xcode $FLAGS ..
 cmake --build . --config Release
+
+python scripts/merge_built_libraries.py build
diff --git a/build_ios_libs.sh b/build_ios_libs.sh
index 620248c8..402f5858 100644
--- a/build_ios_libs.sh
+++ b/build_ios_libs.sh
@@ -21,11 +21,14 @@ cmake --build os64 --config Release
 cmake -B simulatorarm64 -G Xcode $FLAGS -DPLATFORM=SIMULATORARM64 ..
 cmake --build simulatorarm64 --config Release
 
-HEADERS="../amalgamated/pocketpy.h"
+cd ../
+
+HEADERS="amalgamated/pocketpy.h"
+
+python scripts/merge_built_libraries.py build/os64
+python scripts/merge_built_libraries.py build/simulatorarm64
 
 xcodebuild -create-xcframework \
-    -library os64/Release-iphoneos/libpocketpy.a -headers $HEADERS \
-    -library simulatorarm64/Release-iphonesimulator/libpocketpy.a -headers $HEADERS \
-    -output pocketpy.xcframework
-
-
+    -library build/os64/libpocketpy.a -headers $HEADERS \
+    -library build/simulatorarm64/libpocketpy.a -headers $HEADERS \
+    -output build/pocketpy.xcframework
diff --git a/plugins/flutter/pocketpy/.gitignore b/plugins/flutter/pocketpy/.gitignore
index ac5aa989..13511432 100644
--- a/plugins/flutter/pocketpy/.gitignore
+++ b/plugins/flutter/pocketpy/.gitignore
@@ -26,4 +26,4 @@ migrate_working_dir/
 /pubspec.lock
 **/doc/api/
 .dart_tool/
-build/
+build/
\ No newline at end of file
diff --git a/plugins/flutter/pocketpy/ios/Frameworks/.gitkeep b/plugins/flutter/pocketpy/ios/Frameworks/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/plugins/flutter/pocketpy/ios/pocketpy.podspec b/plugins/flutter/pocketpy/ios/pocketpy.podspec
index a22a211c..9a240cd9 100644
--- a/plugins/flutter/pocketpy/ios/pocketpy.podspec
+++ b/plugins/flutter/pocketpy/ios/pocketpy.podspec
@@ -29,7 +29,7 @@ A new Flutter FFI plugin project.
   # Flutter.framework does not contain a i386 slice.
   s.pod_target_xcconfig       = {
     'DEFINES_MODULE' => 'YES',
-    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386'
+    'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386',
     'OTHER_LDFLAGS' => '-force_load ' + __dir__ + '/Frameworks/libpocketpy.a',
   }
 end
diff --git a/plugins/flutter/pocketpy/macos/Frameworks/.gitkeep b/plugins/flutter/pocketpy/macos/Frameworks/.gitkeep
new file mode 100644
index 00000000..e69de29b
diff --git a/plugins/flutter/pocketpy/macos/pocketpy.podspec b/plugins/flutter/pocketpy/macos/pocketpy.podspec
index 34c4757c..66d0bd98 100644
--- a/plugins/flutter/pocketpy/macos/pocketpy.podspec
+++ b/plugins/flutter/pocketpy/macos/pocketpy.podspec
@@ -25,7 +25,7 @@ A new Flutter FFI plugin project.
   s.source                    = { :path => '.' }
   s.source_files              = 'Classes/**/*'
   s.library                   = 'c'
-  s.pod_target_xcconfig       = {
+  s.pod_target_xcconfig = {
     'DEFINES_MODULE' => 'YES',
     'OTHER_LDFLAGS' => '-force_load ' + __dir__ + '/Frameworks/libpocketpy.a',
   }
diff --git a/scripts/merge_built_libraries.py b/scripts/merge_built_libraries.py
new file mode 100644
index 00000000..9246e38a
--- /dev/null
+++ b/scripts/merge_built_libraries.py
@@ -0,0 +1,31 @@
+import os, sys
+assert sys.platform == 'darwin', sys.platform
+
+if len(sys.argv) == 2:
+    build_dir = sys.argv[1]
+    output_dir = sys.argv[1]
+elif len(sys.argv) == 3:
+    build_dir = sys.argv[1]
+    output_dir = sys.argv[2]
+else:
+    print('Usage: python merge_built_libraries.py <build_dir> [output_dir]')
+    exit(1)
+
+assert os.path.exists(build_dir), build_dir
+assert os.path.exists(output_dir), output_dir
+
+archives = []
+
+# get all .a files in build/3rd recursive
+for root, dirs, files in os.walk(build_dir):
+    for file in files:
+        if file.endswith('.a') and file.startswith('lib'):
+            archives.append(os.path.join(root, file))
+
+print('Merging the following static libraries:')
+for archive in archives:
+    print('- ' + archive)
+
+# libtool -static -o libpocketpy.a
+output_archive = os.path.join(output_dir, 'libpocketpy.a')
+os.system('libtool -static -o {} {}'.format(output_archive, ' '.join(archives)))