enable flakes

default.nix

@@ -1,7 +1,4 @@
-# default.nix
-let
-  pkgs = import <nixpkgs> { config = {}; overlays = []; };
-in
+{pkgs,...}:
 {
   xbuild = pkgs.callPackage ./pkgs/x/xbuild/package.nix {};
   cedro = pkgs.callPackage ./pkgs/c/cedro/package.nix {};

flake.nix

@@ -13,9 +13,9 @@
     {
       packages = forAllSystems (system: let
         pkgs = nixpkgs.legacyPackages.${system};
-      in {
-        xbuild = pkgs.callPackage ./pkgs/x/xbuild/package.nix {};
-        cedro  = pkgs.callPackage ./pkgs/c/cedro/package.nix {};
-      });
+      in
+        import ./default.nix { inherit pkgs; });
     };
 }
+
+  

pkgs/c/cedro/package.nix

@@ -0,0 +1,29 @@
+# cedro.nix
+{
+  lib,
+  stdenv,
+  fetchFromGitHub,
+  zip,
+  ...
+}:
+
+stdenv.mkDerivation {
+  pname = "cedro";
+  version = "0.0.1";
+
+  src = fetchFromGitHub {
+    owner = "shen390s";
+    repo = "cedro";
+    rev = "master";
+    sha256 = "sha256-DLq7vC+4k2TMy5jKvQkFTy+xZmpvl0+DiWcd7CBVbgw=";
+  };
+
+  nativeBuildInputs = [ 
+    zip
+  ];
+
+  installPhase = ''
+     mkdir -p $out/bin
+     cp bin/* $out/bin
+  '';
+}

pkgs/x/xbuild/package.nix

@@ -6,6 +6,7 @@
   autoconf,
   automake,
   libtool,
+  ...
 }:
 
 stdenv.mkDerivation {