diff --git a/modules/javafx.web/src/main/native/Source/JavaScriptCore/CMakeLists.txt b/modules/javafx.web/src/main/native/Source/JavaScriptCore/CMakeLists.txt
index 3145fe77ca..be5992a355 100644
--- a/modules/javafx.web/src/main/native/Source/JavaScriptCore/CMakeLists.txt
+++ b/modules/javafx.web/src/main/native/Source/JavaScriptCore/CMakeLists.txt
@@ -181,6 +181,28 @@ file(GLOB JavaScriptCore_SCRIPTS_SOURCES ${JavaScriptCore_SCRIPTS_SOURCES_PATHS}
 
 foreach (_file ${JavaScriptCore_SCRIPTS_SOURCES})
     get_filename_component(_script "${_file}" NAME)
+    # introduce one second delay to prevent any lock
+    execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 1)
+    set(copy_success FALSE)
+    set(copy_attempts 0)
+    while(NOT copy_success AND copy_attempts LESS 4)
+        execute_process(
+            COMMAND ${CMAKE_COMMAND} -E copy_if_different ${_file} ${JavaScriptCore_SCRIPTS_DIR}/${_script}
+            RESULT_VARIABLE copy_result
+            OUTPUT_VARIABLE copy_output
+        )
+        if(copy_result)
+            message(WARNING "Failed to copy ${_file} to ${JavaScriptCore_SCRIPTS_DIR}/${_script}: ${copy_output}")
+            # retry the copy after a delay of one second
+            execute_process(COMMAND ${CMAKE_COMMAND} -E sleep 1)
+        else()
+            set(copy_success TRUE)
+        endif()
+        math(EXPR copy_attempts "${copy_attempts}+1")
+    endwhile()
+    if(NOT copy_success)
+        message(FATAL_ERROR "Failed to copy ${_file} after multiple attempts")
+    endif()
     add_custom_command(
         OUTPUT ${JavaScriptCore_SCRIPTS_DIR}/${_script}
         MAIN_DEPENDENCY ${_file}
diff --git a/modules/javafx.web/src/main/native/Source/JavaScriptCore/Scripts/generate-derived-sources.sh b/modules/javafx.web/src/main/native/Source/JavaScriptCore/Scripts/generate-derived-sources.sh
index 40acae449b..1f4a9e7776 100644
--- a/modules/javafx.web/src/main/native/Source/JavaScriptCore/Scripts/generate-derived-sources.sh
+++ b/modules/javafx.web/src/main/native/Source/JavaScriptCore/Scripts/generate-derived-sources.sh
@@ -15,4 +15,5 @@ if [ ! "$CC" ]; then
     export CC="`xcrun -find clang`"
 fi
 
-make --no-builtin-rules -f "JavaScriptCore/DerivedSources.make" -j `/usr/sbin/sysctl -n hw.ncpu` SDKROOT="${SDKROOT}" "${ARGS[@]}"
+#make --no-builtin-rules -f "JavaScriptCore/DerivedSources.make" -j `/usr/sbin/sysctl -n hw.ncpu` SDKROOT="${SDKROOT}" "${ARGS[@]}"
+make --no-builtin-rules -f "JavaScriptCore/DerivedSources.make" -j 8 SDKROOT="${SDKROOT}"
diff --git a/modules/javafx.web/src/main/native/Tools/Scripts/webkitdirs.pm b/modules/javafx.web/src/main/native/Tools/Scripts/webkitdirs.pm
index c74a6ab516..39cbd42272 100644
--- a/modules/javafx.web/src/main/native/Tools/Scripts/webkitdirs.pm
+++ b/modules/javafx.web/src/main/native/Tools/Scripts/webkitdirs.pm
@@ -650,7 +650,8 @@ sub determineNumberOfCPUs
         # Assumes cygwin
         $numberOfCPUs = `ls /proc/registry/HKEY_LOCAL_MACHINE/HARDWARE/DESCRIPTION/System/CentralProcessor | wc -w`;
     } elsif (isDarwin() || isBSD()) {
-        chomp($numberOfCPUs = `sysctl -n hw.ncpu`);
+        #chomp($numberOfCPUs = `sysctl -n hw.ncpu`);
+        $numberOfCPUs = 8;
     } else {
         $numberOfCPUs = 1;
     }