fix: devShells merging

flake.lock

@@ -2,15 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1735402525,
-        "narHash": "sha256-0RzBF9sKEjHo7Sinrs8wFktrUNc90ziOI48RLtZTW6U=",
+        "lastModified": 1738435198,
+        "narHash": "sha256-5+Hmo4nbqw8FrW85FlNm4IIrRnZ7bn0cmXlScNsNRLo=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "0429fa5b552a5c182e23d0e14de644db867961e4",
+        "rev": "f6687779bf4c396250831aa5a32cbfeb85bb07a3",
         "type": "github"
       },
       "original": {
         "owner": "NixOS",
+        "ref": "nixos-24.11",
         "repo": "nixpkgs",
         "type": "github"
       }

flake.nix

@@ -1,7 +1,7 @@
 {
   description = "yukkop's nix utilities";
   inputs = {
-    nixpkgs.url = "github:NixOS/nixpkgs";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-24.11";
     rust-overlay = {
       url = "github:oxalica/rust-overlay";
       inputs = {
@@ -94,15 +94,16 @@
         else
 	  pkgs.pkgsBuildHost.rust-bin.stable."1.81.0".default;
       in
-      shells.default // {
+      shells.default //
+      (pkgs.mkShell {
         nativeBuildInputs = [ 
 	   rustToolchain
 	   pkgs.pkg-config
 	];
-      };
-      haskell = shells.default // {
+      });
+      haskell = shells.default // (pkgs.mkShell {
         buildInputs = [ pkgs.stack ];
-      };
+      });
     };
 
 

large_file.json

@@ -1,8 +0,0 @@
-[
-  {
-    "c": "unique_text_1",
-    "ln": "en_US",
-    "lb": "l1",
-    "s": "0000000000000000000000000000000000000000000000000000000000000001"
-  }
-]