diff --git a/flake.nix b/flake.nix
index ac46e09..21a1aff 100644
--- a/flake.nix
+++ b/flake.nix
@@ -28,21 +28,27 @@
           stdenv = final.gcc13Stdenv;
         };
       };
+
+      chicken = final: prev: {
+        chicken = final.callPackage ./nix/chicken.nix {
+          stdenv = final.gcc13Stdenv;
+        };
+      };
     };
 
     devShells = eachSystem (system: {
       default = let
         pkgs = import nixpkgs {
-          overlays = [ self.overlays.tcc-mob ];
+          overlays = [ self.overlays.tcc-mob self.overlays.chicken ];
         };
       in pkgs.mkShell {
-        packages = with pkgs; [ tcc-mob pkg-config ];
+        packages = with pkgs; [ tcc-mob chicken pkg-config ]
+                              ++ (with pkgs.chickenPackages_5.chickenEggs; [
+                                lsp-server
+                                transducers
+                              ]);
         shellHook = ''
-          mkdir -p .chicken; cd .chicken
-          curl https://code.call-cc.org/releases/5.4.0/chicken-5.4.0.tar.gz | tar xzf -
-          cd ..
-          make -C .chicken/chicken-5.4.0 -j16 PREFIX=$(pwd)/.chicken C_COMPILER=${pkgs.tcc-mob}/bin/tcc
-          export CHICKEN_INSTALL_PREFIX="$(pwd)/.chicken"
+          export CC=${pkgs.tcc-mob}/bin/tcc
           export CHICKEN_INSTALL_REPOSITORY="$(pwd)/.chicken/eggs"
           export CHICKEN_REPOSITORY_PATH="${pkgs.chicken}/lib/chicken/11:$CHICKEN_REPOSITORY_PATH:$(pwd)/.chicken/eggs"
           export PATH="$PATH:$CHICKEN_INSTALL_PREFIX/bin"