* nickel: switch to cargoHash
* gnvim-unwrapped: switch to cargoHash
* surrealdb-migrations: switch to cargoHash
* wluma: switch to cargoHash
* httm: switch to cargoHash
No need (observed) for these packages to have a vendor Cargo.lock. If they for some reason have to use a different Cargo.lock than upstream, they should copy that to the build directory as well, otherwise the build will fail. They don't, so I infer there's no reason to use Cargo.lock.
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