diff --git a/buildjdk.sh b/buildjdk.sh
index d9000aa..d75f95f 100755
--- a/buildjdk.sh
+++ b/buildjdk.sh
@@ -98,10 +98,16 @@ if [ "$error_code" -ne 0 ]; then
   exit $error_code
 fi
 
+jobs=4
+
+if [ "$BUILD_IOS" == "1" ]; then
+  jobs=$(sysctl -n hw.ncpu)
+fi
+
 cd build/${JVM_PLATFORM}-${TARGET_JDK}-${JVM_VARIANTS}-${JDK_DEBUG_LEVEL}
-make JOBS=4 images || \
+make JOBS=$jobs images || \
 error_code=$?
 if [ "$error_code" -ne 0 ]; then
   echo "Build failure, exited with code $error_code. Trying again."
-  make JOBS=4 images
+  make JOBS=$jobs images
 fi