diff --git a/build.sh b/build.sh
index 10782e00..d3ce6d46 100644
--- a/build.sh
+++ b/build.sh
@@ -67,12 +67,12 @@ build_firmware() {
   # e.g: RAK_4631_Repeater-v1.0.0-SHA.uf2
 
   # copy .bin for esp32 boards
-  cp .pio/build/$1/firmware.bin out/${FIRMWARE_FILENAME}.bin 2>/dev/null
-  cp .pio/build/$1/firmware-merged.bin out/${FIRMWARE_FILENAME}-merged.bin 2>/dev/null
+  cp .pio/build/$1/firmware.bin out/${FIRMWARE_FILENAME}.bin 2>/dev/null || true
+  cp .pio/build/$1/firmware-merged.bin out/${FIRMWARE_FILENAME}-merged.bin 2>/dev/null || true
 
   # copy .zip and .uf2 of nrf52 boards
-  cp .pio/build/$1/firmware.uf2 out/${FIRMWARE_FILENAME}.uf2 2>/dev/null
-  cp .pio/build/$1/firmware.zip out/${FIRMWARE_FILENAME}.zip 2>/dev/null
+  cp .pio/build/$1/firmware.uf2 out/${FIRMWARE_FILENAME}.uf2 2>/dev/null || true
+  cp .pio/build/$1/firmware.zip out/${FIRMWARE_FILENAME}.zip 2>/dev/null || true
 
 }