fix: appveyor build failing
fix: appveyor build failing

esiivola/GPYgradients,esiivola/GPYgradients,mikecroucher/GPy,befelix/GPy,dhhjx880713/GPy,ysekky/GPy,befelix/GPy,befelix/GPy,dhhjx880713/GPy,ysekky/GPy,SheffieldML/GPy,esiivola/GPYgradients,dhhjx880713/GPy,SheffieldML/GPy,befelix/GPy,dhhjx880713/GPy,mikecroucher/GPy,ysekky/GPy,ysekky/GPy,SheffieldML/GPy,SheffieldML/GPy,mikecroucher/GPy,esiivola/GPYgradients,mikecroucher/GPy