fix: avoid Cargo metadata IFD

lib/default.nix

@@ -126,7 +126,7 @@ in {
     else throw (envErrorMessage varName);
 
   # -- Cargo.toml --
-  cargoToml = src: (builtins.fromTOML (builtins.readFile "${src}/Cargo.toml"));
+  cargoToml = manifest: (builtins.fromTOML (builtins.readFile manifest));
 
   # Consolidated SQL bundles for the `hectic` schema. Single source of truth
   # for everything that creates objects in the `hectic` namespace, used by

package/postgres/pg-from/default.nix

@@ -5,7 +5,7 @@
   ...
 }: let
   src = ./.;
-  cargo = cargoToml src;
+  cargo = cargoToml ./Cargo.toml;
 in
   pkgs.rustPlatform.buildRustPackage {
     pname = cargo.package.name;

package/postgres/pg-migration/default.nix

@@ -6,7 +6,7 @@
   ...
 }: let
   src = ./.;
-  cargo = cargoToml src;
+  cargo = cargoToml ./Cargo.toml;
 in
   pkgs.rustPlatform.buildRustPackage {
     pname = cargo.package.name;

package/postgres/pg-schema/default.nix

@@ -5,7 +5,7 @@
   ...
 }: let
   src = ./.;
-  cargo = cargoToml src;
+  cargo = cargoToml ./Cargo.toml;
 in
   pkgs.rustPlatform.buildRustPackage {
     pname = cargo.package.name;