diff --git a/ci-helpers/install_tardis_env.sh b/ci-helpers/install_tardis_env.sh
index 4521e165861..3851d30b218 100644
--- a/ci-helpers/install_tardis_env.sh
+++ b/ci-helpers/install_tardis_env.sh
@@ -7,7 +7,6 @@ else
    conda env create -f tardis_env27.yml
    #trouble with building due to segfault at cython (https://github.com/cython/cython/issues/2199)
    #remove if we can get normal cython through conda
-   source activate tardis
    git clone https://github.com/cython/cython
    cd cython
    git checkout c485b1b77264c3c75d090a3c526de24966830d42