Fix xcframework linking for pub.dev installs, bump to 0.1.1

Use DERIVED_FILE_DIR instead of symlinks for force_load path.
Symlinks in PODS_TARGET_SRCROOT fail when installed from pub cache
because Xcode validates build inputs before script phases run.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.1.1
+
+- Fix: xcframework linking when installed from pub.dev (use DERIVED_FILE_DIR instead of symlinks)
+
 ## 0.1.0
 
 - Initial release

ios/tsnet_flutter.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name             = 'tsnet_flutter'
-  s.version          = '0.1.0'
+  s.version          = '0.1.1'
   s.summary          = 'Embedded Tailscale tsnet for Flutter'
   s.description      = <<-DESC
 Embed Tailscale's tsnet in Flutter apps. Provides a userspace WireGuard
@@ -23,27 +23,39 @@ No VPN entitlement needed — uses userspace netstack.
   s.pod_target_xcconfig = {
     'DEFINES_MODULE' => 'YES',
     'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386 x86_64',
-    'OTHER_LDFLAGS' => '$(inherited) -force_load "$(PODS_TARGET_SRCROOT)/_current_slice/TailscaleKit.framework/TailscaleKit"',
+    # Link the Go static library — the script phase copies the correct slice
+    # to DERIVED_FILE_DIR which is always writable and available at link time.
+    'OTHER_LDFLAGS' => '$(inherited) -force_load "$(DERIVED_FILE_DIR)/TailscaleKit"',
   }
 
   s.user_target_xcconfig = {
     'EXCLUDED_ARCHS[sdk=iphonesimulator*]' => 'i386 x86_64',
   }
 
+  # Copy the correct xcframework slice to DERIVED_FILE_DIR before compile.
+  # DERIVED_FILE_DIR is writable and exists before the link phase.
   s.script_phase = {
     :name => 'Select TailscaleKit Slice',
     :script => <<-'SCRIPT',
-      PLUGIN_DIR="${PODS_TARGET_SRCROOT}"
-      LINK="${PLUGIN_DIR}/_current_slice"
-      rm -f "$LINK"
+      XCFW="${PODS_TARGET_SRCROOT}/TailscaleKit.xcframework"
 
       if [ "$PLATFORM_NAME" = "iphonesimulator" ]; then
-        ln -sf "TailscaleKit.xcframework/ios-arm64-simulator" "$LINK"
+        SLICE="ios-arm64-simulator"
       else
-        ln -sf "TailscaleKit.xcframework/ios-arm64" "$LINK"
+        SLICE="ios-arm64"
+      fi
+
+      SRC="$XCFW/$SLICE/TailscaleKit.framework/TailscaleKit"
+      DEST="${DERIVED_FILE_DIR}/TailscaleKit"
+
+      if [ ! -f "$DEST" ] || [ "$SRC" -nt "$DEST" ]; then
+        cp "$SRC" "$DEST"
+        echo "Copied TailscaleKit ($SLICE) to $DEST"
+      else
+        echo "TailscaleKit ($SLICE) up to date"
       fi
-      echo "TailscaleKit: selected $PLATFORM_NAME slice"
     SCRIPT
     :execution_position => :before_compile,
+    :output_files => ['$(DERIVED_FILE_DIR)/TailscaleKit'],
   }
 end

pubspec.yaml

@@ -1,6 +1,6 @@
 name: tsnet_flutter
 description: Embed Tailscale's tsnet in Flutter apps. Provides a userspace WireGuard tunnel with a localhost TCP proxy — no VPN entitlement needed on iOS.
-version: 0.1.0
+version: 0.1.1
 homepage: https://github.com/svrnty/tsnet_flutter
 repository: https://github.com/svrnty/tsnet_flutter
 issue_tracker: https://github.com/svrnty/tsnet_flutter/issues