diff --git a/.travis.yml b/.travis.yml
index 328221c..0ac907d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -71,7 +71,7 @@ install:
   - export CC=$CC$VERSION
   - export CXX=$CXX$VERSION
   - cd ci-scripts
-  - ./install-deps.sh
+  - ./install-deps.sh `pwd`/local
   - cd ..
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export LD_LIBRARY_PATH=${LATDIR}/ci-scripts/local/lib:$LD_LIBRARY_PATH; fi
 
diff --git a/ci-scripts/install-deps.sh b/ci-scripts/install-deps.sh
index 6af31a5..400bbbe 100755
--- a/ci-scripts/install-deps.sh
+++ b/ci-scripts/install-deps.sh
@@ -1,10 +1,16 @@
 #!/usr/bin/env bash
 
+if (( $# != 1 )); then
+  echo "usage: `basename $0` <prefix> {osx|linux}" 1>&2
+  exit 1
+fi
+PREFIX=$1
+
 set -ex
 mkdir -p local/build
 for d in nlopt minuit hdf5; do
   if [ ! -e local/.built.${d} ]; then
-    ./install-${d}.sh
+    ./install-${d}.sh ${PREFIX}
   fi
 done
-./install-latcore.sh
+./install-latcore.sh ${PREFIX}
diff --git a/ci-scripts/install-hdf5.sh b/ci-scripts/install-hdf5.sh
index e37c36f..c1009b0 100755
--- a/ci-scripts/install-hdf5.sh
+++ b/ci-scripts/install-hdf5.sh
@@ -2,6 +2,12 @@
 
 NAME='hdf5-1.8.16'
 
+if (( $# != 1 )); then
+  echo "usage: `basename $0` <prefix> {osx|linux}" 1>&2
+  exit 1
+fi
+PREFIX=$1
+
 set -ex
 INITDIR=`pwd`
 cd local/build
@@ -9,7 +15,7 @@ wget http://www.hdfgroup.org/ftp/HDF5/current/src/${NAME}.tar.gz
 tar -xzvf ${NAME}.tar.gz
 mkdir ${NAME}/build
 cd ${NAME}/build
-../configure --prefix=${INITDIR}/local --enable-cxx
+../configure --prefix=${PREFIX} --enable-cxx
 make -j4 
 make install
 cd ${INITDIR}/local
diff --git a/ci-scripts/install-latan.sh b/ci-scripts/install-latan.sh
index 3272181..1d4dd2a 100755
--- a/ci-scripts/install-latan.sh
+++ b/ci-scripts/install-latan.sh
@@ -4,17 +4,16 @@ if (( $# != 2 )); then
   echo "usage: `basename $0` <prefix> {osx|linux}" 1>&2
   exit 1
 fi
-LATAN_PREFIX=$1
+PREFIX=$1
 OS=$2
 
 set -ex
-PREFIX=`pwd`/local
-./install-deps.sh
+./install-deps.sh ${PREFIX}
 cd ..
 ./bootstrap.sh
 mkdir -p build
 cd build
 if [[ "$OS" == "osx" ]]; then EXTRA_FLAGS='--with-gsl=/usr/local'; fi
-../configure --prefix=$LATAN_PREFIX --with-minuit=$PREFIX --with-nlopt=$PREFIX --with-latcore=$PREFIX --with-hdf5=$PREFIX $EXTRA_FLAGS
+../configure --prefix=$PREFIX --with-minuit=$PREFIX --with-nlopt=$PREFIX --with-latcore=$PREFIX --with-hdf5=$PREFIX $EXTRA_FLAGS
 make -j4
 make install
diff --git a/ci-scripts/install-latcore.sh b/ci-scripts/install-latcore.sh
index c4b7319..d0d3f39 100755
--- a/ci-scripts/install-latcore.sh
+++ b/ci-scripts/install-latcore.sh
@@ -1,5 +1,11 @@
 #!/usr/bin/env bash
 
+if (( $# != 1 )); then
+  echo "usage: `basename $0` <prefix> {osx|linux}" 1>&2
+  exit 1
+fi
+PREFIX=$1
+
 set -ex
 INITDIR=`pwd`
 cd local/build
@@ -13,7 +19,7 @@ else
   ./bootstrap.sh
 fi
 cd build
-../configure --prefix=${INITDIR}/local
+../configure --prefix=${PREFIX}
 make -j4 
 make install
 cd ${INITDIR}
diff --git a/ci-scripts/install-minuit.sh b/ci-scripts/install-minuit.sh
index 5599df4..233672e 100755
--- a/ci-scripts/install-minuit.sh
+++ b/ci-scripts/install-minuit.sh
@@ -2,6 +2,12 @@
 
 NAME='Minuit2-5.34.14'
 
+if (( $# != 1 )); then
+  echo "usage: `basename $0` <prefix> {osx|linux}" 1>&2
+  exit 1
+fi
+PREFIX=$1
+
 set -ex
 INITDIR=`pwd`
 cd local/build
@@ -9,7 +15,7 @@ wget http://www.cern.ch/mathlibs/sw/5_34_14/Minuit2/${NAME}.tar.gz
 tar -xzvf ${NAME}.tar.gz
 mkdir -p ${NAME}/build
 cd ${NAME}/build
-../configure --prefix=${INITDIR}/local --disable-openmp
+../configure --prefix=${PREFIX} --disable-openmp
 make -j4 
 make install
 cd ${INITDIR}/local
diff --git a/ci-scripts/install-nlopt.sh b/ci-scripts/install-nlopt.sh
index 450c824..1518dc6 100755
--- a/ci-scripts/install-nlopt.sh
+++ b/ci-scripts/install-nlopt.sh
@@ -2,6 +2,12 @@
 
 NAME='nlopt-2.4.2'
 
+if (( $# != 1 )); then
+  echo "usage: `basename $0` <prefix> {osx|linux}" 1>&2
+  exit 1
+fi
+PREFIX=$1
+
 set -ex
 INITDIR=`pwd`
 cd local/build
@@ -9,7 +15,7 @@ wget http://ab-initio.mit.edu/nlopt/${NAME}.tar.gz
 tar -xzvf ${NAME}.tar.gz
 mkdir -p ${NAME}/build
 cd ${NAME}/build
-../configure --prefix=${INITDIR}/local --with-cxx --without-guile --without-python --without-octave --without-matlab --with-pic
+../configure --prefix=${PREFIX} --with-cxx --without-guile --without-python --without-octave --without-matlab --with-pic
 make -j4 
 make install
 cd ${INITDIR}/local