diff --git a/build.sh b/build.sh
index 9adccb78ca07b1dcd601d6d55e7ded29b63883a2..733d46cce31cdb26f2378e1ee0cd20381ce7a105 100755
--- a/build.sh
+++ b/build.sh
@@ -25,7 +25,7 @@ then
 
  if [ ! -d $HOME/$5/MPI ]; then
    echo "COPY MPICH"
-   cp -R $HOME/MPI_base $HOME/$5/MPI
+   cp -R $HOME/MPI $HOME/$5/MPI
    echo 1 > $HOME/$5/MPI/version
  fi
 
@@ -35,16 +35,16 @@ then
 
  mkdir $HOME/$5
  if [ x"$4" == x"full" ]; then
-  ./install CC=gcc-4.9.2 CXX=g++-4.9.2 FC=gfortran-4.9.2 F77=gfortran-4.9.2  -i $HOME/$5  -s -c "--prefix=/home/jenkins/openfpm_install"
+  CC=gcc-4.9.2 CXX=g++-4.9.2 FC=gfortran-4.9.2 F77=gfortran-4.9.2 ./install -i $HOME/$5  -s -c "--prefix=/home/jenkins/openfpm_install"
   mv $HOME/openfpm_vars $HOME/openfpm_vars_$5
   source $HOME/openfpm_vars_$5
  elif [ x"$3" == x"numerics" ]; then
-  ./install -i $HOME/$5  -m -s -c "--prefix=/home/jenkins/openfpm_install"
+  CC=gcc-4.9.2 CXX=g++-4.9.2 FC=gfortran-4.9.2 F77=gfortran-4.9.2 ./install -i $HOME/$5  -m -s -c "--prefix=/home/jenkins/openfpm_install"
   mv $HOME/openfpm_vars $HOME/openfpm_vars_$5
   source $HOME/openfpm_vars_$5
   make $3
  else
-  ./install -i $HOME/$5  -m -s -c "--prefix=/home/jenkins/openfpm_install --no-recursion"
+  CC=gcc-4.9.2 CXX=g++-4.9.2 FC=gfortran-4.9.2 F77=gfortran-4.9.2 ./install -i $HOME/$5  -m -s -c "--prefix=/home/jenkins/openfpm_install --no-recursion"
   mv $HOME/openfpm_vars $HOME/openfpm_vars_$5
   source $HOME/openfpm_vars_$5
   make $3
diff --git a/script/detect_gcc b/script/detect_gcc
index 04bd00d5ab4a09638f5172c85a6466e046d14294..aab7f4a54774e0713aa0620de2cb39d0b1620b82 100755
--- a/script/detect_gcc
+++ b/script/detect_gcc
@@ -23,25 +23,42 @@ function detect_compiler()
 
     dgc_ret=0
 
-    if [ x"$CXX" != x"" -o x"$CC" != x"" -o x"$F77" != x"" -o x"$FC" != x"" ]; then
-        
-        if [ $CXX  ]
+     if [ x"$CXX" != x"" -o x"$CC" != x"" -o x"$F77" != x"" -o x"$FC" != x"" ]; then
+
+        if [ x"$CXX" == x"" ]; then
+          CXX=g++
+        fi
+
+        if [ x"$CC" == x"" ]; then
+          CC=gcc
+        fi
+
+        if [ x"$FC" == x"" ]; then
+          FC=gfortran
+        fi
+
+        if [ x"$F77" == x"" ]; then
+          F77=gfortran
+        fi
 
         echo -e "\033[1;34;5m  ---------------------------------------------------------------------- \033[0m"
         echo -e "\033[1;34;5m  Selected compilers    \033[0m"
         echo -e "\033[1;34;5m  ---------------------------------------------------------------------- \033[0m"
 
-	echo -e "\033[91;1m The user request to use specifics compilers to compile C/C++ or Fortran code \033[0m"
-	echo -e "\033[91;1m specifing one or more of these variables CXX/CC/F77/FC. When at least one is \033[0m"
+        echo -e "\033[91;1m The user request to use specifics compilers to compile C/C++ or Fortran code \033[0m"
+        echo -e "\033[91;1m specifing one or more of these variables CXX/CC/F77/FC. When at least one is \033[0m"
         echo -e "\033[91;1m defined the specified compiler will be used. \033[0m"
-	echo -e "\033[91;1m When not specified the system will use the default g++/gcc/gfortran/gfortran \033[0m"
-	echo -e "\033[91;1m The installer will use the following compilers \033[0m"
-
-	echo -e ""
-	echo -e "CXX=$CXX"
-	echo -e "CC=$CC"
-	echo -e "F77=$F77"
-	echo -e "FC=$FC"
+        echo -e "\033[91;1m When not specified the system will use the default g++/gcc/gfortran/gfortran \033[0m"
+        echo -e "\033[91;1m The installer will use the following compilers \033[0m"
+
+        echo -e ""
+        echo -e "CXX=$CXX"
+        echo -e "CC=$CC"
+        echo -e "F77=$F77"
+        echo -e "FC=$FC"
+
+        dgc_ret=1
+        dgc_compiler=$CXX
 
         return
     fi