diff --git a/_ci/after_build.sh b/_ci/after_build.sh
index d3798e096e356884640877fa4610c8157e3c6dc0..61d728f408987bb1b280b484c12d86843272a072 100755
--- a/_ci/after_build.sh
+++ b/_ci/after_build.sh
@@ -15,8 +15,7 @@ run_cmd git clean -ffdx \
     --exclude="miniconda.sh" \
     --exclude="miniconda/pkgs/*.tar.bz2" \
     --exclude="miniconda/pkgs/urls.txt" \
-    --exclude="miniconda/conda-bld/linux-64/*.tar.bz2" \
-    --exclude="miniconda/conda-bld/osx-64/*.tar.bz2" \
+    --exclude="miniconda/conda-bld/${OS_SLUG}/*.tar.bz2" \
     --exclude="_ci" \
     --exclude="dist/*.zip" \
     --exclude="sphinx"
diff --git a/_ci/functions.sh b/_ci/functions.sh
index 9c2fcddfc02d44941ce5704b437868b937ee08a2..f5e044defd0ad5a7c697786685d839c9d6975ac4 100644
--- a/_ci/functions.sh
+++ b/_ci/functions.sh
@@ -187,6 +187,11 @@ set_conda_channels() {
 }
 
 
+if [ -z "${OS_SLUG}" ]; then
+  OS_SLUG="${OSNAME}-64"
+fi
+
+export_env OS_SLUG
 log_env PYTHON_VERSION
 check_env CI_PROJECT_DIR
 check_env CI_PROJECT_NAME
@@ -202,11 +207,6 @@ DOCSERVER=http://www.idiap.ch
 # Sets up the location of our rc file for conda
 CONDARC=${CONDA_ROOT}/condarc
 
-if [ -z "${OS_SLUG}" ]; then
-  OS_SLUG="${OSNAME}-64"
-fi
-
-export_env OS_SLUG
 export_env DOCSERVER
 check_env CONDA_ROOT
 export_env CONDARC