conditional was inverted

Author: neontty

ci_scripts/install.sh

@@ -25,7 +25,7 @@ popd
 # Configure the conda environment and put it in the path using the
 # provided versions
 SCIKIT_LEARN_ARG=""
-if [[ -z $SCIKIT_LEARN_VERSION ]]; then
+if [[ ! -z $SCIKIT_LEARN_VERSION ]]; then
     SCIKIT_LEARN_ARG="scikit-learn=$SCIKIT_LEARN_VERSION"
 fi
 conda create -n testenv --yes python=$PYTHON_VERSION pip nose \