diff --git a/ci/bootstrap.sh b/ci/bootstrap.sh
index b88688f638549c9ef072d6321191de365c3dadeb..438c482c76cc7597f3926bfae6a0f1598ec5f0f9 100755
--- a/ci/bootstrap.sh
+++ b/ci/bootstrap.sh
@@ -38,7 +38,7 @@ merge_conda_cache() {
     _urlstxt="${1}/urls.txt"
     if [ -e ${2} ]; then
       log_info "Merging urls.txt and packages with cached files..."
-      mv ${2}/*.tar.bz2 ${1}/
+      log_info mv ${2}/*.tar.bz2 ${1}/
       cat ${_urlstxt} ${_cached_urlstxt} | sort | uniq > ${_urlstxt}
     fi
   fi
diff --git a/ci/build.sh b/ci/build.sh
index 69c51257463bdef41542c70f403141da18550fe4..70978e2be2c76a7e0abd26f17f498fbfdb69745f 100755
--- a/ci/build.sh
+++ b/ci/build.sh
@@ -63,8 +63,8 @@ else
 fi
 
 log_info "$ ${CONDA_ROOT}/bin/python ${CI_PROJECT_DIR}/ci/nextbuild.py ${channel} ${CI_PROJECT_NAME} ${BOB_PACKAGE_VERSION} ${PYTHON_VERSION}"
-BOB_BUILD_NUMBER=$(${CONDA_ROOT}/bin/python ${CI_PROJECT_DIR}/ci/nextbuild.py ${channel} ${CI_PROJECT_NAME} ${BOB_PACKAGE_VERSION} ${PYTHON_VERSION})
-export_env BOB_BUILD_NUMBER
+export BOB_BUILD_NUMBER=$(${CONDA_ROOT}/bin/python ${CI_PROJECT_DIR}/ci/nextbuild.py ${channel} ${CI_PROJECT_NAME} ${BOB_PACKAGE_VERSION} ${PYTHON_VERSION})
+check_defined BOB_BUILD_NUMBER
 
 # copy the recipe_append.yaml over before build
 run_cmd cp ${CI_PROJECT_DIR}/bob/devtools/data/recipe_append.yaml conda/