build(deps) update nix

- update nix flake
- bump hard coded reference to rustfmt nightly version
- fix warning that latest version of rustfmt produced

1 files changed, 1 insertions, 1 deletions

diff --git a/flake.nix b/flake.nix
index d527e36..26fda20 100644
--- a/flake.nix
+++ b/flake.nix
@@ -22,7 +22,7 @@
             # ideally this wouldn't be pinned to a specific nightly version but
             # selectLatestNightlyWith isn't support with mixed toolchains
             # https://github.com/oxalica/rust-overlay/issues/136
-            (lib.hiPrio rust-bin.nightly."2023-09-01".rustfmt)
+            (lib.hiPrio rust-bin.nightly."2023-12-01".rustfmt)
             # (rust-bin.stable.latest.override { extensions = [ "rust-analyzer" ]; })
             rust-bin.stable.latest.default
           ];