Fix broken appveyor release
Fix broken appveyor release

[skip ci]

kulibali/ponyc,cquinn/ponyc,cquinn/ponyc,dipinhora/ponyc,dipinhora/ponyc,CausalityLtd/ponyc,CausalityLtd/ponyc,sgebbie/ponyc,Praetonus/ponyc,sgebbie/ponyc,sgebbie/ponyc,Praetonus/ponyc,dipinhora/ponyc,sgebbie/ponyc,kulibali/ponyc,Theodus/ponyc,sgebbie/ponyc,Praetonus/ponyc,CausalityLtd/ponyc,cquinn/ponyc,cquinn/ponyc,kulibali/ponyc,ponylang/ponyc,Theodus/ponyc,ponylang/ponyc,Theodus/ponyc,Praetonus/ponyc,ponylang/ponyc,jemc/ponyc,kulibali/ponyc,Theodus/ponyc,jemc/ponyc,jemc/ponyc,Theodus/ponyc