chore(script/setup_nightly): fix OS X and repeated nightly builds
chore(script/setup_nightly): fix OS X and repeated nightly builds

digama0/lean,fpvandoorn/lean,Kha/lean,leanprover-community/lean,fpvandoorn/lean,leodemoura/lean,digama0/lean,Kha/lean,dselsam/lean,leanprover/lean,dselsam/lean,digama0/lean,leanprover-community/lean,digama0/lean,dselsam/lean,leanprover-community/lean,Kha/lean,fpvandoorn/lean,Kha/lean,leanprover/lean,Kha/lean,leanprover/lean,leodemoura/lean,leanprover-community/lean,leodemoura/lean,leodemoura/lean,Kha/lean,dselsam/lean,fpvandoorn/lean,dselsam/lean,leodemoura/lean,dselsam/lean,leanprover/lean,leodemoura/lean,digama0/lean,leanprover/lean,fpvandoorn/lean,leanprover-community/lean,leanprover/lean,digama0/lean,leanprover-community/lean,fpvandoorn/lean