RCT_NO_LAUNCH_PACKAGER=true will solves port problems

scripts/test.e2e.ios.js

   const scheme = release ? `playground_release` : `playground`;
   const conf = release ? `Release` : `Debug`;
 
-  exec.execSync(`RCT_NO_LAUNCH_PACKAGER=true
-            cd ./playground/ios && xcodebuild
-            build
+  exec.execSync(`cd ./playground/ios &&
+            RCT_NO_LAUNCH_PACKAGER=true
+            xcodebuild build
             -scheme ${scheme}
             -project playground.xcodeproj
             -sdk iphonesimulator

scripts/test.unit.ios.js

 
 function run() {
   const conf = release ? `Release` : `Debug`;
-  exec.execSync(`RCT_NO_LAUNCH_PACKAGER=true
-          cd ./playground/ios && xcodebuild
-            build build-for-testing
+
+  exec.execSync(`cd ./playground/ios &&
+            RCT_NO_LAUNCH_PACKAGER=true
+            xcodebuild build build-for-testing
             -scheme "ReactNativeNavigation"
             -project playground.xcodeproj
             -sdk iphonesimulator
             -configuration ${conf}
             -derivedDataPath ./DerivedData/playground
             ONLY_ACTIVE_ARCH=YES`);
-  exec.execSync(`RCT_NO_LAUNCH_PACKAGER=true
-          cd ./playground/ios && xcodebuild
-            test-without-building
+
+  exec.execSync(`cd ./playground/ios &&
+            RCT_NO_LAUNCH_PACKAGER=true
+            xcodebuild test-without-building
             -scheme "ReactNativeNavigation"
             -project playground.xcodeproj
             -sdk iphonesimulator