diff --git a/whisper-cpp-2023/native.sh b/whisper-cpp-2023/native.sh
index 31c3c9c..79eaf89 100644
--- a/whisper-cpp-2023/native.sh
+++ b/whisper-cpp-2023/native.sh
@@ -5,7 +5,13 @@ if [ ! -d ./git.d ]; then
 fi
 
 cd ./git.d
-make samples
-make
-bash ./models/download-ggml-model.sh tiny.en
-time ./main -m ./models/ggml-tiny.en.bin -f samples/gb1.wav -t 4
+if [ ! -f ./samples/gb1.wav ]; then
+   make samples
+fi
+if [ ! -f ./main ]; then
+   make
+fi
+if [ ! -f ./models/ggml-${MODEL:-tiny.en}.bin ]; then
+   bash ./models/download-ggml-model.sh ${MODEL:-tiny.en}
+fi
+time ./main -m ./models/ggml-${MODEL:-tiny.en}.bin -f ./samples/gb1.wav -t 4