diff --git a/install_circompara b/install_circompara
index c6e848b..9989419 100755
--- a/install_circompara
+++ b/install_circompara
@@ -3,26 +3,24 @@
 export CIRCOMPARA_HOME=$(dirname $(readlink -f $0))
 
 mkdir $CIRCOMPARA_HOME/tools
-## check whether Scons is installed and install it if not
+mkdir -p $CIRCOMPARA_HOME/bin
+
+export PATH=$CIRCOMPARA_HOME/bin/:$PATH
+## export environment variable for local R repository
+export R_LIBS=$CIRCOMPARA_HOME/tools/R_libs
+
 ## install Scons
-command -v scons >/dev/null 2>&1 ||\
-{ echo >&2 "I require Scons but it's not installed. Installing Scons..."; 
 cd $CIRCOMPARA_HOME/tools;
-wget -N -c http://prdownloads.sourceforge.net/scons/scons-local-2.5.1.tar.gz;
+wget -N -c http://prdownloads.sourceforge.net/scons/scons-local-3.1.2.tar.gz;
 mkdir -p scons
-tar -xf scons-local-2.5.1.tar.gz -C scons ; 
+tar -xf scons-local-3.1.2.tar.gz -C scons ; 
 ln -s $CIRCOMPARA_HOME/tools/scons/scons.py $CIRCOMPARA_HOME/bin/scons;
-cd - ;}
+cd -
 
 cd $CIRCOMPARA_HOME/bin
 ln -s ../src/*.py .
 ln -s ../src/*.R .
 cd -
 
-export PATH=$CIRCOMPARA_HOME/bin/:$PATH
-
-## export environment variable for local R repository
-export R_LIBS="$CIRCOMPARA_HOME/tools/R_libs"
-
 ## install other tools
-scons -i -f $CIRCOMPARA_HOME/src/ccp_install_tools.scons $1 
+$CIRCOMPARA_HOME/bin/scons -i -f $CIRCOMPARA_HOME/src/ccp_install_tools.scons $1