It is my understanding that rakudobrew has been renamed to rakubrew: https://rakubrew.org Could the be the issue?
> On 12 Jun 2020, at 14:59, Richard Hainsworth <rnhainswo...@gmail.com> wrote: > > I ran into this error using Rakudobrew on appveyor (see after <snip>) > > I'm new at using appveyor, so maybe my script is wrong. But I wonder whether > its because of a name change to raku without a backward alias to perl6. > > <snip> > > Rakudo has been built and installed. > > Updating shims > Done, moar-2020.05.1 built > rakudobrew build zef > Cloning into 'zef'... > Your branch is up to date with 'origin/master'. > rakudobrew: perl6: command not found > Command exited with code 1