diff --git a/flake.lock b/flake.lock
index 1e6803a..5265071 100644
--- a/flake.lock
+++ b/flake.lock
@@ -15,22 +15,6 @@
         "url": "https://git.ocjtech.us/jeff/nixos-bash-prompt-builder.git"
       }
     },
-    "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-utils": {
       "inputs": {
         "systems": "systems"
@@ -49,72 +33,6 @@
         "type": "github"
       }
     },
-    "flake-utils_2": {
-      "locked": {
-        "lastModified": 1659877975,
-        "narHash": "sha256-zllb8aq3YO3h8B/U0/J1WBgAL8EX5yWf5pMj3G0NAmc=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "c0e246b9b83f637f4681389ecabcb2681b4f3af0",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "flake-utils_3": {
-      "inputs": {
-        "systems": "systems_2"
-      },
-      "locked": {
-        "lastModified": 1694529238,
-        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
-        "type": "github"
-      },
-      "original": {
-        "owner": "numtide",
-        "repo": "flake-utils",
-        "type": "github"
-      }
-    },
-    "gitignore": {
-      "inputs": {
-        "nixpkgs": [
-          "zls",
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1694102001,
-        "narHash": "sha256-vky6VPK1n1od6vXbqzOXnekrQpTL4hbPAwUhT5J9c9E=",
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "rev": "9e21c80adf67ebcb077d75bd5e7d724d21eeafd6",
-        "type": "github"
-      },
-      "original": {
-        "owner": "hercules-ci",
-        "repo": "gitignore.nix",
-        "type": "github"
-      }
-    },
-    "langref": {
-      "flake": false,
-      "locked": {
-        "narHash": "sha256-mYdDCBdNEIeMbavdhSo8qXqW+3fqPC8BAich7W3umrI=",
-        "type": "file",
-        "url": "https://raw.githubusercontent.com/ziglang/zig/63bd2bff12992aef0ce23ae4b344e9cb5d65f05d/doc/langref.html.in"
-      },
-      "original": {
-        "type": "file",
-        "url": "https://raw.githubusercontent.com/ziglang/zig/63bd2bff12992aef0ce23ae4b344e9cb5d65f05d/doc/langref.html.in"
-      }
-    },
     "make-shell": {
       "locked": {
         "lastModified": 1634940815,
@@ -150,9 +68,7 @@
         "bash": "bash",
         "flake-utils": "flake-utils",
         "make-shell": "make-shell",
-        "nixpkgs": "nixpkgs",
-        "zig": "zig",
-        "zls": "zls"
+        "nixpkgs": "nixpkgs"
       }
     },
     "systems": {
@@ -169,69 +85,6 @@
         "repo": "default",
         "type": "github"
       }
-    },
-    "systems_2": {
-      "locked": {
-        "lastModified": 1681028828,
-        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
-        "owner": "nix-systems",
-        "repo": "default",
-        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
-        "type": "github"
-      },
-      "original": {
-        "owner": "nix-systems",
-        "repo": "default",
-        "type": "github"
-      }
-    },
-    "zig": {
-      "inputs": {
-        "flake-compat": "flake-compat",
-        "flake-utils": "flake-utils_2",
-        "nixpkgs": [
-          "nixpkgs"
-        ]
-      },
-      "locked": {
-        "lastModified": 1697285248,
-        "narHash": "sha256-CPV/LWV/2nJKasawkshdCX1bLRsKGtSSiDoy14jix8c=",
-        "owner": "mitchellh",
-        "repo": "zig-overlay",
-        "rev": "ee376d4012e3c853123ca7083af852313235407c",
-        "type": "github"
-      },
-      "original": {
-        "owner": "mitchellh",
-        "repo": "zig-overlay",
-        "type": "github"
-      }
-    },
-    "zls": {
-      "inputs": {
-        "flake-utils": "flake-utils_3",
-        "gitignore": "gitignore",
-        "langref": "langref",
-        "nixpkgs": [
-          "nixpkgs"
-        ],
-        "zig-overlay": [
-          "zig"
-        ]
-      },
-      "locked": {
-        "lastModified": 1697187644,
-        "narHash": "sha256-O1u6ysfQXbu2+DOFCLzG8xUNrUxsJ1v1GajTgfWWVm0=",
-        "owner": "zigtools",
-        "repo": "zls",
-        "rev": "8673e747dedf52bd85e165b7be9605a56cb669d5",
-        "type": "github"
-      },
-      "original": {
-        "owner": "zigtools",
-        "repo": "zls",
-        "type": "github"
-      }
     }
   },
   "root": "root",
diff --git a/flake.nix b/flake.nix
index a08dbf0..ee96f29 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,22 +14,10 @@
     make-shell = {
       url = "github:ursi/nix-make-shell";
     };
-    zig = {
-      url = "github:mitchellh/zig-overlay";
-      inputs.nixpkgs.follows = "nixpkgs";
-    };
-    zls = {
-      url = "github:zigtools/zls";
-      inputs.nixpkgs.follows = "nixpkgs";
-      inputs.zig-overlay.follows = "zig";
-    };
   };
 
   outputs = { self, nixpkgs, flake-utils, bash, ... }@inputs:
-    let
-      systems = builtins.attrNames inputs.zig.packages;
-    in
-    flake-utils.lib.eachSystem systems (
+    flake-utils.lib.eachDefaultSystem (
       system:
       let
         pkgs = import nixpkgs {
@@ -53,8 +41,9 @@
           in
           make-shell {
             packages = [
-              inputs.zig.packages.${system}.master
-              # inputs.zls.packages.${system}.zls
+              pkgs.zon2nix
+              pkgs.zig_0_11
+              pkgs.zls
             ];
             env = {
               PS1 = prompt;
diff --git a/src/main.zig b/src/main.zig
index fb0e008..b7c7b11 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -258,7 +258,7 @@ pub const DateTime = struct {
                         if (self.year < 0) {
                             try writer.writeAll("-");
                         }
-                        try writer.print("{d:0>4}", .{@abs(self.year)});
+                        try writer.print("{d:0>4}", .{std.math.absCast(self.year)});
                     },
 
                     .A => try writeTwelveHour(self.hour, .upper),