Adding flake

flake.nix

@@ -0,0 +1,39 @@
+{
+  description = "Simple REPL shell for untyped lambda expressions.";
+  inputs = {
+    nixpkgs.url = "nixpkgs";
+    cf.url = "github:jzbor/cornflakes";
+    cf.inputs.nixpkgs.follows = "nixpkgs";
+    crane.url = "github:ipetkov/crane";
+  };
+
+  outputs = { nixpkgs, cf, crane, ... }:
+  cf.lib.flakeForDefaultSystems (system:
+  with builtins;
+  let
+    pkgs = nixpkgs.legacyPackages.${system};
+    craneLib = crane.mkLib pkgs;
+    nativeBuildInputs = with pkgs; [
+      clang
+    ];
+  in {
+    ### PACKAGES ###
+    packages = {
+      default = craneLib.buildPackage {
+        pname = "foliot";
+
+        src = ./.;
+
+        # Add extra inputs here or any other derivation settings
+        # doCheck = true;
+        inherit nativeBuildInputs;
+      };
+    };
+  }) // {
+    nixConfig = {
+      extra-substituters = [ "https://cache.jzbor.de/public" ];
+      extra-trusted-public-keys = [ "public:AdkE6qSLmWKFX4AptLFl+n+RTPIo1lrBhT2sPgfg5s4=" ];
+    };
+  };
+}
+