Try to fix appveyor script
@@ -32,7 +32,7 @@ conda update -q conda
conda info -a
conda install conda-build anaconda-client
conda create -q -n test-environment python=%PYTHON_VERSION% numpy scipy pytest future
-conda install -c conda-forge twine
+REM conda install -c conda-forge twine
:: N.B. Need to run with call otherwise the script hangs
call activate test-environment
