Problems with `buildFromSdist`

[srid]

buildFromSdist provides the benefit of checking release-worthiness (something not all Haskell projects care about, because they don't all care to release to Hackage).

But it does so at the expense of causing much pain:

• settings override not being applied when source is overriden #238
• custom option is broken for *new* packages #283
• Patches are applied twice if buildFromSDist is enabled #290
• buildFromSdist fails with Rust packages #292

Can we replace it with something that just works?