diff --git a/support/setup_travis.sh b/support/setup_travis.sh
index 01213ac..413d45f 100755
--- a/support/setup_travis.sh
+++ b/support/setup_travis.sh
@@ -13,7 +13,7 @@ python_version=$2
 temp_dir=$(mktemp -d)
 
 # get conda-forge, not main, packages
-conda config --remove channels defaults
+conda config --remove channels defaults || :
 conda config --add channels conda-forge
 if [ ${imp_branch} = "develop" ]; then
   IMP_CONDA="imp-nightly"