Flake build fails on NixOS

[plaidfinch]

Building the flake with nix build .#penumbra fails. Here is the relevant part of the error message:

error: couldn't read crates/view/src/storage/schema.sql: No such file or directory (os error 2)
  --> crates/view/src/storage.rs:58:45
   |
58 |     Lazy::new(|| hex::encode(Sha256::digest(include_str!("storage/schema.sql"))));
   |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in the macro `include_str` (in Nightly builds, run with -Z macro-backtrace for more info)

error: couldn't read crates/view/src/storage/schema.sql: No such file or directory (os error 2)
   --> crates/view/src/storage.rs:216:30
    |
216 |             tx.execute_batch(include_str!("storage/schema.sql"))?;
    |                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    |
    = note: this error originates in the macro `include_str` (in Nightly builds, run with -Z macro-backtrace for more info)

error: could not compile `penumbra-view` (lib) due to 2 previous errors

Chasing this error, it becomes apparent that none of the include_str! things in the crate build correctly. However, the Nix formula in https://github.com/starlingcyber/infra/blob/main/packages/penumbra.nix does work. Comparing the two, we see that this repo's flake builds Penumbra like this:

penumbra = (craneLib.buildPackage {
            pname = "penumbra";
            src = cleanSourceWith {
              src = if penumbraRelease == null then craneLib.path ./. else fetchFromGitHub {
                owner = "penumbra-zone";
                repo = "penumbra";
                rev = "v${penumbraRelease.version}";
                sha256 = "${penumbraRelease.sha256}";
              };
              filter = path: type:
                # Retain proving and verification parameters, and no-lfs marker file ...
                (builtins.match ".*\.(no_lfs|param|bin)$" path != null) ||
                # ... as well as all the normal cargo source files:
                (craneLib.filterCargoSources path type);
            };
            nativeBuildInputs = [ pkg-config ];
            buildInputs = if stdenv.hostPlatform.isDarwin then 
              with pkgs.darwin.apple_sdk.frameworks; [clang openssl rocksdb SystemConfiguration CoreServices]
            else
              [clang openssl rocksdb];

            inherit system PKG_CONFIG_PATH LIBCLANG_PATH ROCKSDB_LIB_DIR;
            cargoExtraArgs = "-p pd -p pcli -p pclientd";
            meta = {
              description = "A fully private proof-of-stake network and decentralized exchange for the Cosmos ecosystem";
              homepage = "https://penumbra.zone";
              license = [ licenses.mit licenses.asl20 ];
            };
          }).overrideAttrs (_: { doCheck = false; });

Compared to the formula to build Penumbra in the linked repo, which works:

(craneLib.buildPackage {
  pname = name;
  src = cleanSourceWith {
    src = (fetchgit {
      url = "https://github.com/${owner}/${repo}";
      rev = "v${version}";
      sha256 = hash;
      fetchLFS = true;
    });
    filter = path: type:
      # Retain proving and verification parameters, and no-lfs marker file ...
      (builtins.match ".*\.(no_lfs|param||bin)$" path != null) ||
      # ... as well as all the normal cargo source files:
      (craneLib.filterCargoSources path type);
  };
  nativeBuildInputs = [ pkg-config ];
  buildInputs = [ clang openssl ];
  inherit system PKG_CONFIG_PATH LIBCLANG_PATH;
  cargoExtraArgs = "-p pd -p pcli -p pclientd -p pindexer";
}).overrideAttrs (_: { doCheck = false; })

It is not clear to me why the former fails with these file-not-found errors, but the latter succeeds.