diff --git a/build.sh b/build.sh
index cfcbdac8eb10f28c9f1f8f42b5d0eb24874d95d6..1f422128932a30707cbb7a3c3c238c551822e844 100644
--- a/build.sh
+++ b/build.sh
@@ -9,10 +9,11 @@ basedir=$(dirname "$(readlink -f "$0")")
 
 
 start=`date +%s`
-apt-get install update
+su -
+apt-get update
 apt-get install -y sudo 
 sudo apt-get install -y nano
-# sudo apt-get install update 
+# sudo apt-get update 
 sudo apt-get  install  -y scons libfftw3-dev libxm4 libmotif-dev python3-dev python3-pip 
 sudo apt-get install -y python3-scipy python-opencv python3-numpy python3-h5py cython3 gdal-bin gfortran libgdal-dev python3-gdal libhdf5-dev