Hi All. Im looking to install openlane2 and have the following 2 questions: 1. Should I install openlane or openlane2"? Reason I ask is the frequently asked section states: "_If you’re targeting an Efabless MPW project such as_ chipIgnite, we currently exclusively recommend OpenLane 1 given its extensive use (and thus silicon-validation) for such _a purpose_" I am looking to tapeout on chipignite so I guess this means I install openlane instead of openlane-2? 2. Openlane seems to install a whole bunch of tools. However, I already have the following installed: • xschem, ngspice, magic, verilator, ikarus, gtkwave, yosys What happens then if I gitclone openlane? Will it create compatability issues with what is already installed? Do I need to install the remaining required packages individually? If so, is there a list of total packages (+ versions) that need to be installed and I can work from that? Thanks, Diarmuid

Mostly openlane2 will replace OpenLane near future. So install openlane2. MPW uses caravel flow. That installation is different. openlane uses nix based installation and will install all required tools in a separate environment. so it will not use/disturb your local installation.

Thanks @Vijayan Krishnan. I plan to tapeout on openframe. Does that also use the caravel flow? Does the caravel flow use nix based installation also and so will not disturb my local installation?

@Diarmuid Collins: Our official policy on this is that we will not endorse openlane2 until we have proven working silicon. We have silicon coming back in literally just a week or two. So my expectation is that everything will go well and we will flip to openlane2 support in a matter of weeks. If you start using openlane2 now, you do so at your own risk; however, I gauge that risk to be low.

Thanks @Tim Edwards. I will install openlane-2 then. Can you confirm the nix based installation is the correct way to go as described in: https://openlane2.readthedocs.io/en/latest/getting_started/common/nix_installation/installation_linux.html where I clone from: https://github.com/efabless/openlane2 In other words, there is no specific installation required for openframe tapeouts? Thanks

@Diarmuid Collins: I don't use nix but that's the solution preferred by @donn, who is the tool developer, and I trust his opinion.

Thats great @Tim Edwards. I'll use nix to install openlane-2 so. Thanks for the help.