new library: added containers as a dependency.

flake.nix

@@ -11,17 +11,21 @@
     pkgs = nixpkgs.legacyPackages.${system};
     devInputs = with pkgs.ocamlPackages; [merlin];
     ocamlPkgs = with pkgs.ocamlPackages; [menhir dune_3];
-    nativeInputs =  with pkgs; ocamlPkgs ++ [ocaml]; 
+    libs = with pkgs.ocamlPackages; [findlib containers];
+    nativeInputs =  with pkgs; ocamlPkgs ++ [ocaml];
   in
   {
-    packages.default = pkgs.ocamlPackages.buildDunePackage {
+    packages.default = (pkgs.ocamlPackages.buildDunePackage {
       pname = "ollisp";
       version = "0.0.1";
       src = pkgs.lib.cleanSource ./.;
       nativeBuildInputs = nativeInputs;
-    };
+      buildInputs = libs;
+    });
+    
     devShells.default = pkgs.mkShell {
       nativeBuildInputs = nativeInputs ++ devInputs;
+      buildInputs = libs;
     };
   });
 }