Leaving nczarr enabled despite the lack of network access is currently what we'd like to do, although there will be a bigger task ahead of us regarding a separation of 'local-nczarr functionality' vs. 'remote data access functionality', in the code. It's why I've, for the upcoming release candidate, opted to leave libcurl as a dependency when nczarr is enabled. Maybe it's already handled, but I need to make sure nothing breaks if we compile nczarr support without linking libcurl.