diff --git a/.envrc b/.envrc
new file mode 100644
index 0000000..3550a30
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index ea8c4bf..7d2a20b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,5 @@
 /target
+result
+result-*
+*.tmp
+.direnv/
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 0000000..93aaeca
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,164 @@
+{
+  "nodes": {
+    "crate2nix": {
+      "flake": false,
+      "locked": {
+        "lastModified": 1681086579,
+        "narHash": "sha256-MEcdG7EXkFsmrTo1/X5tq7UDFY6enHdl65k0wbTCuD0=",
+        "owner": "kolloch",
+        "repo": "crate2nix",
+        "rev": "1b042dab3928aaa37421a83d4e1023e7a79527e2",
+        "type": "github"
+      },
+      "original": {
+        "owner": "kolloch",
+        "repo": "crate2nix",
+        "type": "github"
+      }
+    },
+    "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"
+      },
+      "locked": {
+        "lastModified": 1681202837,
+        "narHash": "sha256-H+Rh19JDwRtpVPAWp64F+rlEtxUWBAQW28eAi3SRSzg=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "cfacdce06f30d2b68473a46042957675eebb3401",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1687898314,
+        "narHash": "sha256-B4BHon3uMXQw8ZdbwxRK1BmxVOGBV4viipKpGaIlGwk=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "e18dc963075ed115afb3e312b64643bf8fd4b474",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
+      "locked": {
+        "lastModified": 1681358109,
+        "narHash": "sha256-eKyxW4OohHQx9Urxi7TQlFBTDWII+F+x2hklDOQPB50=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "96ba1c52e54e74c3197f4d43026b3f3d92e83ff9",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "crate2nix": "crate2nix",
+        "flake-compat": "flake-compat",
+        "nixpkgs": "nixpkgs",
+        "rust-overlay": "rust-overlay",
+        "utils": "utils"
+      }
+    },
+    "rust-overlay": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs_2"
+      },
+      "locked": {
+        "lastModified": 1688092301,
+        "narHash": "sha256-NTgT955DzXWVjHsuBn1t2K0x4hUghY7uE1jG2nGL5R4=",
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "rev": "4c31223801dd0f28ac15d60f2e5ddbd4d51ce17a",
+        "type": "github"
+      },
+      "original": {
+        "owner": "oxalica",
+        "repo": "rust-overlay",
+        "type": "github"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "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"
+      }
+    },
+    "utils": {
+      "inputs": {
+        "systems": "systems_2"
+      },
+      "locked": {
+        "lastModified": 1687709756,
+        "narHash": "sha256-Y5wKlQSkgEK2weWdOu4J3riRd+kV/VCgHsqLNTTWQ/0=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "dbabf0ca0c0c4bce6ea5eaf65af5cb694d2082c7",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}
diff --git a/flake.nix b/flake.nix
new file mode 100644
index 0000000..bb8a244
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,88 @@
+{
+  description = "trivia on the command line";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    utils.url = "github:numtide/flake-utils";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+    crate2nix = {
+      url = "github:kolloch/crate2nix";
+      flake = false;
+    };
+    flake-compat = {
+      url = "github:edolstra/flake-compat";
+      flake = false;
+    };
+  };
+
+  outputs = { self, nixpkgs, utils, rust-overlay, crate2nix, ... }:
+    let
+      name = "oi";
+    in
+    utils.lib.eachDefaultSystem
+      (system:
+        let
+          # Imports
+          pkgs = import nixpkgs {
+            inherit system;
+            overlays = [
+              rust-overlay.overlays.default
+              (self: super: {
+                # Because rust-overlay bundles multiple rust packages into one
+                # derivation, specify that mega-bundle here, so that crate2nix
+                # will use them automatically.
+                rustc = self.rust-bin.stable.latest.default;
+                cargo = self.rust-bin.stable.latest.default;
+              })
+            ];
+          };
+          inherit (import "${crate2nix}/tools.nix" { inherit pkgs; })
+            generatedCargoNix;
+
+          # Create the cargo2nix project
+          project = pkgs.callPackage
+            (generatedCargoNix {
+              inherit name;
+              src = ./.;
+            })
+            {
+              # Individual crate overrides go here
+              # Example: https://github.com/balsoft/simple-osd-daemons/blob/6f85144934c0c1382c7a4d3a2bbb80106776e270/flake.nix#L28-L50
+              defaultCrateOverrides = pkgs.defaultCrateOverrides // {
+                # The app crate itself is overriden here. Typically we
+                # configure non-Rust dependencies (see below) here.
+                ${name} = oldAttrs: {
+                  inherit buildInputs nativeBuildInputs;
+                } // buildEnvVars;
+              };
+            };
+
+          # Configuration for the non-Rust dependencies
+          buildInputs = with pkgs; [ openssl.dev ];
+          nativeBuildInputs = with pkgs; [ rustc cargo pkgconfig nixpkgs-fmt ];
+          buildEnvVars = {
+            PKG_CONFIG_PATH = "${pkgs.openssl.dev}/lib/pkgconfig";
+          };
+        in
+        rec {
+          packages.${name} = project.rootCrate.build;
+
+          # `nix build`
+          defaultPackage = packages.${name};
+
+          # `nix run`
+          apps.${name} = utils.lib.mkApp {
+            inherit name;
+            drv = packages.${name};
+          };
+          defaultApp = apps.${name};
+
+          # `nix develop`
+          devShell = pkgs.mkShell
+            {
+              inherit buildInputs nativeBuildInputs;
+              RUST_SRC_PATH = "${pkgs.rust.packages.stable.rustPlatform.rustLibSrc}";
+            } // buildEnvVars;
+        }
+      );
+}