diff --git a/install/from-scratch.sh b/install/from-scratch.sh
index 181f9ff7db6746c05d772c9fdc22a98a1e296dff..2331df090b4abe69dc67bad1bf3e2df3b814a98e 100755
--- a/install/from-scratch.sh
+++ b/install/from-scratch.sh
@@ -4,14 +4,15 @@
 set -e
 
 if [ "${#}" != 3 ]; then
-  echo "usage: `basename $0` <basedir> <name> <python-version>"
-  echo "example: `basename $0` /opt/conda bob-devel-py35 3.5"
+  echo "usage: `basename $0` <basedir> <name> <python-version> <bob-devel>"
+  echo "example: `basename $0` /opt/conda bob-devel-py35 3.5 2017.06.06"
   exit 1
 fi
 
 BASEDIR=$1
 NAME=$2
 PYTHON_VERSION=$3
+BOB_DEVEL_VERSION=$4
 PYVER=`echo $PYTHON_VERSION | sed -e 's/\.//'`
 CONDA=${BASEDIR}/bin/conda
 
@@ -24,6 +25,6 @@ if [ -d ${BASEDIR}/envs/${NAME} ]; then
 fi
 
 echo "[>>] Creating environment ${NAME} for python ${PYTHON_VERSION} with bob dependencies..."
-${CONDA} create --yes --name=${NAME} --override-channels --channel=http://www.idiap.ch/software/bob/conda --channel=defaults python=${PYTHON_VERSION} bob-devel
+${CONDA} create --yes --name=${NAME} --override-channels --channel=http://www.idiap.ch/software/bob/conda --channel=defaults python=${PYTHON_VERSION} bob-devel=${BOB_DEVEL}
 echo "[>>] Bye!"
 exit 0
diff --git a/install/install-ci.sh b/install/install-ci.sh
index efc42210fc4dccde2675271670bbe6ec0b25d9a2..2c169be78c4b5dd2b0c75ec0a767d22c7eb92cda 100755
--- a/install/install-ci.sh
+++ b/install/install-ci.sh
@@ -2,14 +2,15 @@
 # Sat 28 Jan 09:16:48 2017 CET
 
 if [ "${#}" != 1 ]; then
-  echo "usage: `basename $0` <prefix>"
-  echo "example: `basename $0` /opt/conda"
+  echo "usage: `basename $0` <prefix> <bob-devel-version>"
+  echo "example: `basename $0` /opt/conda 2017.06.06"
   exit 1
 fi
 
 BASEDIR=$1
 BINDIR=$(dirname $0)
 CONDA=${BASEDIR}/bin/conda
+BOB_DEVEL_VERSION=$2
 
 echo "[>>] Cleaning conda cache..."
 ${CONDA} clean --all --yes
@@ -21,5 +22,5 @@ for k in 2.7 3.5 3.6; do
   py=`echo $k | sed -e 's/\.//'`
   e="bob-devel-py$py"
   echo "[>>] Installing CI environment $e using python-$k..."
-  ${BINDIR}/from-scratch.sh ${BASEDIR} $e $k
+  ${BINDIR}/from-scratch.sh ${BASEDIR} $e $k ${BOB_DEVEL_VERSION}
 done