diff --git a/scripts/jenkins-build.sh b/scripts/jenkins-build.sh
index 239cabd..cb18082 100644
--- a/scripts/jenkins-build.sh
+++ b/scripts/jenkins-build.sh
@@ -37,6 +37,14 @@ if [[ ! -n ${NO_GPU} ]] || [ ${NO_GPU} = false ]; then
   nvidia-smi
 fi
 
+# set test Python and NumPy version
+if [[ ! -n ${TEST_PY} ]] ; then
+  export TEST_PY='3.6'
+fi
+if [[ ! -n ${TEST_NP} ]] ; then
+  export TEST_NP='1.15'
+fi
+
 if [[ ! -n ${RECIPE_PATH} ]] ; then
   export RECIPE_PATH=Wrappers/Python/conda-recipe
 fi
@@ -108,7 +116,11 @@ cat .git/HEAD
 
 # presume that git clone is done before this script is launched, if not, uncomment
 #git clone https://github.com/vais-ral/CCPi-Regularisation-Toolkit
-conda install -y conda-build
+conda install -y conda-build git
+
+# increase the package timeout option
+conda config --set remote_read_timeout_secs 120
+
 #cd CCPi-Regularisation-Toolkit # already there by jenkins
 
 if [[ -n ${CCPI_PRE_BUILD} ]]; then
@@ -120,7 +132,13 @@ fi
 # need to call first build
 
 if [[ -d ${RECIPE_PATH} ]]; then
-  eval conda build ${RECIPE_PATH} "$CCPI_BUILD_ARGS" "$@"
+  ##if >0 commit (some _ in version) then marking as dev build
+  if [[ ${ncommits} == "0" ]]; then
+    eval conda build ${RECIPE_PATH} "$CCPI_BUILD_ARGS" "$@"
+  else
+    eval conda build --no-test ${RECIPE_PATH} "$CCPI_BUILD_ARGS" "$@"
+    eval conda build ${RECIPE_PATH} "$CCPI_BUILD_ARGS" "$@" --python=${TEST_PY} --numpy=${TEST_NP}
+  fi
   # call with --output generates the files being created
   #export REG_FILES=$REG_FILES`eval conda build Wrappers/Python/conda-recipe "$CCPI_BUILD_ARGS" --output`$'\n'
   #--output bug work around
@@ -128,7 +146,13 @@ if [[ -d ${RECIPE_PATH} ]]; then
 fi
 
 if [[ -d recipe ]]; then
-  eval conda build recipe "$CCPI_BUILD_ARGS" "$@"
+  ##if >0 commit (some _ in version) then marking as dev build
+  if [[ ${ncommits} == "0" ]]; then
+    eval conda build recipe "$CCPI_BUILD_ARGS" "$@"
+  else
+    eval conda build --no-test recipe "$CCPI_BUILD_ARGS" "$@"
+    eval conda build recipe "$CCPI_BUILD_ARGS" "$@" --python=${TEST_PY} --numpy=${TEST_NP}
+  fi
   # call with --output generates the files being created
   #--output bug work around
   #export REG_FILES=$REG_FILES`eval conda build recipe "$CCPI_BUILD_ARGS" --output`$'\n'