diff --git a/gcc-devel/flake.lock b/gcc-devel/flake.lock
index a8646a0..dfaecfb 100644
--- a/gcc-devel/flake.lock
+++ b/gcc-devel/flake.lock
@@ -2,16 +2,16 @@
   "nodes": {
     "nixpkgs": {
       "locked": {
-        "lastModified": 1659914493,
-        "narHash": "sha256-lkA5X3VNMKirvA+SUzvEhfA7XquWLci+CGi505YFAIs=",
+        "lastModified": 1698318101,
+        "narHash": "sha256-gUihHt3yPD7bVqg+k/UVHgngyaJ3DMEBchbymBMvK1E=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "022caabb5f2265ad4006c1fa5b1ebe69fb0c3faf",
+        "rev": "63678e9f3d3afecfeafa0acead6239cdb447574c",
         "type": "github"
       },
       "original": {
         "owner": "nixos",
-        "ref": "nixos-21.05",
+        "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"
       }