build.wls

Needs["PacletManager`"];
Print[];
directory = DirectoryName[ First @ $ScriptCommandLine ];
Print["Directory: ", directory];
files = FileNames["*.paclet", directory];
Print["Found paclets (to be deleted): ", files];
DeleteFile /@ files;
Print["Building new paclet"];
paclet = PackPaclet[FileNameJoin[{directory, "Prototypes"}]];
Print["New paclet: ", paclet];