diff --git a/Dockerfile b/Dockerfile
index 92efb25..ee8c1c7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,6 +4,7 @@ ARG SRV_UID="1000"
 ARG SRV_GID="100"
 ARG SRV_LOCALE="en_US"
 ARG SRV_VERSION="0"
+ARG SRV_APT_GET_INSTALL=""
 
 ENV SRV_UID=$SRV_UID
 ENV SRV_GID=$SRV_GID