diff --git a/Dockerfile b/Dockerfile
index ac61def..191cd5c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,9 +16,8 @@ RUN \
   rm -rf /var/lib/apt/lists/* && \
   cd /tmp && \
   wget ${ArduinoDownloadUrl}/${ArduinoPackage} && \
-  Filename=`tar -tzf ${ArduinoPackage}` && \
   tar -xzf ${ArduinoPackage} && \
-  mv $Filename /usr/bin/arduino-cli && \
+  mv arduino-cli /usr/bin/arduino-cli && \
   groupadd -r -g $ArduinoGID $USER && \
   useradd -m -r -u $ArduinoUID -g $USER -G dialout $USER