chore(ci,appveyor): use activate, see https://github.com/conda/conda/issues/8836
chore(ci,appveyor): use activate, see https://github.com/conda/conda/issues/8836

maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex,maartenbreddels/vaex