hash mismatch in fixed-output derivation

[wallacekelly-da]

Repro steps

1. Clone the repo.
2. Run nix-shell path/to/nix-daml-sdk/shell.nix

Expected result

A nix-shell successfully starts.

Actual result

I get the following error:

error: hash mismatch in fixed-output derivation '/nix/store/fbnqfll5cydc9qnh4n84wb1cq0iczckv-DigitalAssetHoldingsLLC-daml.zip.drv':
         specified: sha256-kVHXjuCNqJWKSZRT72Dg3eqf3R8xKo7N+qY9ISyrKHM=
            got:    sha256-kU8yoQe4mjQqgVbrmucn/ucKaiU7HsrkF36dArzX8Tg=
error: 1 dependencies of derivation '/nix/store/ri4v58cr51kvs4z21kn2rffpsrvn1823-vscode-extension-DigitalAssetHoldingsLLC-daml-2.6.4.drv' failed to build
error: 1 dependencies of derivation '/nix/store/11hlnnhh7py2nv6baaxfbiy90cyqdgwh-vscode-extensions.drv' failed to build
error: 1 dependencies of derivation '/nix/store/m8bnmrj0n7s80vriy5gnqiw871kqd423-vscode-with-extensions-1.84.2.drv' failed to build

Observation

I notice that versions/2.5.5.json and versions/2.6.4.json have the same value for sdk.extensionSha256. Looks like a possible copy-and-paste error?