fix flake

flake.nix

@@ -42,34 +42,14 @@
         src = craneLib.cleanCargoSource ./.;
         commonArgs = {
           inherit src;
-          nativeBuildInputs = with pkgs; [
-            pkg-config
-            nix.dev
-          ];
           strictDeps = true;
+          cargoArtifacts = craneLib.buildDepsOnly commonArgs;
         };
-        cargoArtifacts = craneLib.buildDepsOnly commonArgs;
+        app = craneLib.buildPackage (commonArgs);
-        individualCrateArgs = commonArgs // {
-          inherit cargoArtifacts;
-          inherit (craneLib.crateNameFromCargoToml { inherit src; }) version;
-        };
 
-        fileSetForCrate =
-          crate:
-          lib.fileset.toSource {
-            root = ./.;
-            fileset = lib.fileset.unions [
-              ./Cargo.toml
-              ./Cargo.lock
-            ];
-          };
-        server = craneLib.buildPackage (
-          individualCrateArgs
-          // {
-          }
-        );
       in
       {
+        packages.default = app;
         devShells.default = craneLib.devShell {
           inherit (commonArgs) nativeBuildInputs;
           RUSTFLAGS = "-Clinker=clang -Clink-arg=-fuse-ld=mold -Z macro-backtrace";