diff --git a/flake.nix b/flake.nix
index a4b4374..d3dfd13 100644
--- a/flake.nix
+++ b/flake.nix
@@ -47,17 +47,49 @@
           let
             pkgs = import nixpkgs { system = "x86_64-linux"; };
             craneLib = crane.lib."x86_64-linux";
-          in {
+          in rec {
+            kifu-core-deps = craneLib.buildDepsOnly {
+              pname = "kifu-core-deps";
+              version = "0.1.0";
+              src = craneLib.cleanCargoSource (craneLib.path ./.);
+              cargoExtraArgs = "-p kifu-core";
+            };
+            kifu-core = craneLib.buildPackage {
+              pname = "kifu-core";
+              version = "0.1.0";
+              src = craneLib.cleanCargoSource (craneLib.path ./.);
+              cargoExtraArgs = "-p kifu-core";
+              doInstallCargoArtifacts = true;
+              inherit kifu-core-deps;
+            };
+            kifu-gtk-deps = craneLib.buildDepsOnly {
+              pname = "kifu-gtk-deps";
+              version = "0.1.0";
+              src = craneLib.cleanCargoSource (craneLib.path ./.);
+              nativeBuildInputs = with pkgs; [
+                pkg-config
+                glib
+                gtk4
+              ];
+              buildInputs = with pkgs; [
+                pkg-config
+              ];
+              cargoExtraArgs = "-p kifu-gtk";
+              inherit kifu-core;
+            };
             kifu-gtk = craneLib.buildPackage {
               pname = "kifu-gtk";
               version = "0.1.0";
               src = craneLib.cleanCargoSource (craneLib.path ./.);
               cargoExtraArgs = "-p kifu-gtk";
               nativeBuildInputs = with pkgs; [
-                pkg-config
                 glib
                 gtk4
               ];
+              buildInputs = with pkgs; [
+                pkg-config
+              ];
+              inherit kifu-gtk-deps;
             };
           };
     };