I think the bigger issue is whether your production database platform supports PostGIS. If you don't have C extension privileges over your production database,

I think the bigger issue is whether your production database platform supports PostGIS. If you don't have C extension privileges over your production database, you're going to have to start convincing some admins to do you a favour. (These days, it's actually quite a common request though and it's generally one of the first extensions most e.g. cloud offerings support)