Add flakes

.envrc

@@ -1,2 +1 @@
-use_nix
+use flake
-unset PS1

flake.lock

@@ -0,0 +1,61 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1681091990,
+        "narHash": "sha256-ifIzhksUBZKp5WgCuoVhDY32qaEplXp7khzrB6zkaFc=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "ea96b4af6148114421fda90df33cf236ff5ecf1d",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixos-22.11",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1681037374,
+        "narHash": "sha256-XL6X3VGbEFJZDUouv2xpKg2Aljzu/etPLv5e1FPt1q0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "033b9f258ca96a10e543d4442071f614dc3f8412",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,33 @@
+{
+  description = "A Nix flake for my long-running seal blog";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-22.11";
+    utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, utils }:
+    utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+
+        ghc' = pkgs.haskellPackages.ghcWithHoogle (self: with self; [
+          hakyll
+          neat-interpolation
+          parallel
+          random
+          split
+        ]);
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          name = "hakyll-shell";
+
+          buildInputs = with pkgs.haskellPackages;
+            [
+              ghc'
+              hlint
+            ];
+        };
+      });
+}