diff --git a/.devops/nix/sif.nix b/.devops/nix/sif.nix
index 7535ca0f3..7a5e1dd0f 100644
--- a/.devops/nix/sif.nix
+++ b/.devops/nix/sif.nix
@@ -7,7 +7,7 @@
 }:
 
 let
-    optionalInt = cond: x: if cond then x else 0;
+  optionalInt = cond: x: if cond then x else 0;
 in
 singularity-tools.buildImage rec {
   inherit (llama-cpp) name;
diff --git a/flake.lock b/flake.lock
index 84ed2b9d9..47d6448b5 100644
--- a/flake.lock
+++ b/flake.lock
@@ -1,21 +1,5 @@
 {
   "nodes": {
-    "flake-compat": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1673956053,
-        "narHash": "sha256-4gtG9iQuiKITOjNQQeQIpoIB6b16fm+504Ch3sNKLd8=",
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "rev": "35bb57c0c8d8b62bbfd284272c928ceb64ddbde9",
-        "type": "github"
-      },
-      "original": {
-        "owner": "edolstra",
-        "repo": "flake-compat",
-        "type": "github"
-      }
-    },
     "flake-parts": {
       "inputs": {
         "nixpkgs-lib": "nixpkgs-lib"
@@ -34,48 +18,6 @@
         "type": "github"
       }
     },
-    "flake-utils": {
-      "inputs": {
-        "systems": "systems"
-      },
-      "locked": {
-        "lastModified": 1694529238,
-        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "nixfmt": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils",
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "nixpkgs-stable": "nixpkgs-stable"
-      },
-      "locked": {
-        "lastModified": 1707402853,
-        "narHash": "sha256-d7a6xfqhbyLikHultxjHO33SqUcif/8eGyxhRZ9PvZk=",
-        "owner": "piegamesde",
-        "repo": "nixfmt",
-        "rev": "ca1fe3572ea6134551ee6af40ae735a1a1ed0d35",
-        "type": "github"
-      },
-      "original": {
-        "owner": "piegamesde",
-        "ref": "rfc101-style",
-        "repo": "nixfmt",
-        "type": "github"
-      }
-    },
     "nixpkgs": {
       "locked": {
         "lastModified": 1708118438,
@@ -110,43 +52,11 @@
         "type": "github"
       }
     },
-    "nixpkgs-stable": {
-      "locked": {
-        "lastModified": 1696039360,
-        "narHash": "sha256-g7nIUV4uq1TOVeVIDEZLb005suTWCUjSY0zYOlSBsyE=",
-        "owner": "NixOS",
-        "repo": "nixpkgs",
-        "rev": "32dcb45f66c0487e92db8303a798ebc548cadedc",
-        "type": "github"
-      },
-      "original": {
-        "owner": "NixOS",
-        "ref": "nixos-23.05",
-        "repo": "nixpkgs",
-        "type": "github"
-      }
-    },
     "root": {
       "inputs": {
         "flake-parts": "flake-parts",
-        "nixfmt": "nixfmt",
         "nixpkgs": "nixpkgs"
       }
-    },
-    "systems": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index fd4bdddfc..45f9deda0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -18,10 +18,6 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
     flake-parts.url = "github:hercules-ci/flake-parts";
-    nixfmt = {
-        url = "github:piegamesde/nixfmt/rfc101-style";
-        inputs.nixpkgs.follows = "nixpkgs";
-    };
   };
 
   # There's an optional binary cache available. The details are below, but they're commented out.
@@ -111,11 +107,12 @@
         # ```
         #
         # Cf. https://nixos.org/manual/nix/unstable/command-ref/new-cli/nix3-flake.html?highlight=flake#flake-format
-        flake.overlays.default =
-          (final: prev: {
+        flake.overlays.default = (
+          final: prev: {
             llamaPackages = final.callPackage .devops/nix/scope.nix { inherit llamaVersion; };
             inherit (final.llamaPackages) llama-cpp;
-          });
+          }
+        );
 
         systems = [
           "aarch64-darwin"
@@ -136,9 +133,7 @@
           }:
           {
             # For standardised reproducible formatting with `nix fmt`
-            # HELP: why does the per system formatter not work?
-            # formatter = inputs.nixfmt.packages.${system}.nixfmt;
-            formatter = if (system == "x86_64-linux") then inputs.nixfmt.packages.${system}.nixfmt else null;
+            formatter = pkgs.nixfmt-rfc-style;
 
             # Unlike `.#packages`, legacyPackages may contain values of
             # arbitrary types (including nested attrsets) and may even throw