Add Nix flake support

flake.lock

@@ -0,0 +1,59 @@
+{
+  "nodes": {
+    "flake-compat": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1627913399,
+        "narHash": "sha256-hY8g6H2KFL8ownSiFeMOjwPC8P0ueXpCVEbxgda3pko=",
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "rev": "12c64ca55c1014cdc1b16ed5a804aa8576601ff2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "edolstra",
+        "repo": "flake-compat",
+        "type": "github"
+      }
+    },
+    "flake-utils": {
+      "locked": {
+        "lastModified": 1638122382,
+        "narHash": "sha256-sQzZzAbvKEqN9s0bzWuYmRaA03v40gaJ4+iL1LXjaeI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "74f7e4319258e287b0f9cb95426c9853b282730b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1639867199,
+        "narHash": "sha256-Ozed2PjzlgVvztj8QD6OtAjhgvi7nWbWFWz2Slq2tYI=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "487bb1b1e232015fe4732880389f2fa664f812fc",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-compat": "flake-compat",
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

@@ -0,0 +1,45 @@
+# SPDX-FileCopyrightText: 2021 Serokell <https://serokell.io/>
+#
+# SPDX-License-Identifier: CC0-1.0
+
+{
+  description = "My haskell application";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs";
+    flake-utils.url = "github:numtide/flake-utils";
+
+    flake-compat.url = "github:edolstra/flake-compat";
+    flake-compat.flake = false;
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = nixpkgs.legacyPackages.${system};
+
+        haskellPackages = pkgs.haskellPackages;
+
+        jailbreakUnbreak = pkg:
+          pkgs.haskell.lib.doJailbreak (pkg.overrideAttrs (_: { meta = { }; }));
+
+        # DON'T FORGET TO PUT YOUR PACKAGE NAME HERE, REMOVING `throw`
+        packageName = "conways-game-of-life";
+      in {
+        packages.${packageName} =
+          haskellPackages.callCabal2nix packageName self rec {
+            # Dependency overrides go here
+          };
+
+        defaultPackage = self.packages.${system}.${packageName};
+
+        devShell = pkgs.mkShell {
+          buildInputs = with haskellPackages; [
+            ghcid
+            cabal-install
+            hlint
+          ];
+          inputsFrom = builtins.attrValues self.packages.${system};
+        };
+      });
+}

shell.nix

@@ -0,0 +1,8 @@
+(import (
+  let lock = builtins.fromJSON (builtins.readFile ./flake.lock);
+  in
+  fetchTarball {
+    url = "https://github.com/edolstra/flake-compat/archive/${lock.nodes.flake-compat.locked.rev}.tar.gz";
+    sha256 = lock.nodes.flake-compat.locked.narHash;
+  }
+) { src = ./.; }).shellNix