nix: bump scenefx flake and fix build

flake.lock

@@ -18,6 +18,27 @@
         "type": "github"
       }
     },
+    "flake-utils": {
+      "inputs": {
+        "systems": [
+          "scenefx",
+          "systems"
+        ]
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1750386251,
@@ -58,16 +79,18 @@
     },
     "scenefx": {
       "inputs": {
+        "flake-utils": "flake-utils",
         "nixpkgs": [
           "nixpkgs"
-        ]
+        ],
+        "systems": "systems"
       },
       "locked": {
-        "lastModified": 1750785057,
-        "narHash": "sha256-tGX6j4W91rcb+glXJo43sjPI9zQvPotonknG1BdihR4=",
+        "lastModified": 1762447505,
+        "narHash": "sha256-VEBQ8KXkSS4c+kdAhmvq06lEd9WNeCXdRK1U+qSilFw=",
         "owner": "wlrfx",
         "repo": "scenefx",
-        "rev": "3a6cfb12e4ba97b43326357d14f7b3e40897adfc",
+        "rev": "7f9e7409f6169fa637f1265895c121a8f8b70272",
         "type": "github"
       },
       "original": {
@@ -75,6 +98,21 @@
         "repo": "scenefx",
         "type": "github"
       }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1689347949,
+        "narHash": "sha256-12tWmuL2zgBgZkdoB6qXZsgJEH9LR3oUgpaQq2RbI80=",
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "rev": "31732fcf5e8fea42e59c2488ad31a0e651500f68",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default-linux",
+        "type": "github"
+      }
     }
   },
   "root": "root",

flake.nix

@@ -25,12 +25,13 @@
 
       perSystem = {
         config,
+        system,
         pkgs,
         ...
       }: let
-        inherit (pkgs) callPackage ;
+        inherit (pkgs) callPackage;
         mango = callPackage ./nix {
-          inherit (inputs.scenefx.packages.${pkgs.stdenv.hostPlatform.system}) scenefx;
+          scenefx = inputs.scenefx.packages.${system}.default;
         };
         shellOverride = old: {
           nativeBuildInputs = old.nativeBuildInputs ++ [];