nix: use gcc15

resolves Nix build/CI failures introduced in 9190443
bumps flake.lock as gcc15Stdenv wasn't available at the pinned version
of nixpkgs

1 files changed, 3 insertions, 3 deletions

diff --git a/flake.lock b/flake.lock
index 22f246d5..01b437e6 100644
--- a/flake.lock
+++ b/flake.lock
@@ -276,11 +276,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1748026106,
-        "narHash": "sha256-6m1Y3/4pVw1RWTsrkAK2VMYSzG4MMIj7sqUy7o8th1o=",
+        "lastModified": 1748460289,
+        "narHash": "sha256-7doLyJBzCllvqX4gszYtmZUToxKvMUrg45EUWaUYmBg=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "063f43f2dbdef86376cc29ad646c45c46e93234c",
+        "rev": "96ec055edbe5ee227f28cdbc3f1ddf1df5965102",
         "type": "github"
       },
       "original": {