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Should we use the `SKY130B` in the open_pdks for the June 17th tapeout even though we are not using ReRAM? <@U016EM8L91B> Asking on behalf of the Stanford EE372 tapeout class.

The ChipIgnite runs are _not_ using the ReRAM option, so please continue to use `sky130A`.

<@U016EM8L91B> How can I build only `sky130A` then? I think by doing the `make pdk` both are built, `sky130A` and `sky130B`.

<@U02UAUGSQ22>:  Per the open_pdks installation instructions on the website:  *--with-sky130-variants=* *all*|*A*|*B*

<@U016EM8L91B> so the whole command is then `make pdk --with-sky130-variants=A`*?*

I guess you're talking about `make pdk` inside the caravel or user project repository?  I don't know if it is set up to select one or the other variant.

I mean the `make pdk` when you setup OpenLane per this doc: <https://github.com/The-OpenROAD-Project/OpenLane>

Yep, definitely OpenLane currently build both, and I found out by running out of disk :slightly_smiling_face:

That, I don't know.  You'll have to ask the Openlane developers.

I just posted the question in the <#C016H8WJMBR|openlane> channel. I see that `all` is default. Maybe switching the default to `A` would be an option, as long as the ChipIgnite runs use only the `A`?

*--with-sky130-variants=* *all*|*A*|*B*
This configuration option restricts the generation and installation of PDKs to a specific variant. If only one of the variants will be used for design, then time to generate and install can be cut in half by ignoring the unused PDK variant. _Default value if not specified:_: *all*