updated build system

docker/x86_64/mingw64

@@ -1170,6 +1170,8 @@ ARG UID=1000
 ARG GID=1000
 ARG USERNAME=myuser
 
+RUN delgroup scanner || echo "no scanner group found"
+
 RUN addgroup -g $GID $USERNAME && \
     adduser -D -u $UID -G $USERNAME -h /home/$USERNAME $USERNAME