diff --git a/.envrc b/.envrc
new file mode 100644
index 00000000..3550a30f
--- /dev/null
+++ b/.envrc
@@ -0,0 +1 @@
+use flake
diff --git a/.gitignore b/.gitignore
index c202f83f..1c19e543 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,5 +7,5 @@ c-plus-plus.conf.sh
 /make-setup/_tmp
 
 CMakeLists.txt
-
-.idea/
\ No newline at end of file
+.direnv
+.idea/
diff --git a/flake.lock b/flake.lock
new file mode 100644
index 00000000..13f9c124
--- /dev/null
+++ b/flake.lock
@@ -0,0 +1,41 @@
+{
+  "nodes": {
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1634319982,
+        "narHash": "sha256-jJ83sVEX20uT0AulXm351TdlBX3ApFmCwF+U/FGdw6Q=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "bcd05cd2ab0a3f87718ddd1dfc61e6ba6f9f7087",
+        "type": "github"
+      },
+      "original": {
+        "id": "nixpkgs",
+        "type": "indirect"
+      }
+    },
+    "root": {
+      "inputs": {
+        "nixpkgs": "nixpkgs",
+        "utils": "utils"
+      }
+    },
+    "utils": {
+      "locked": {
+        "lastModified": 1631561581,
+        "narHash": "sha256-3VQMV5zvxaVLvqqUrNz3iJelLw30mIVSfZmAaauM3dA=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "7e5bf3925f6fbdfaf50a2a7ca0be2879c4261d19",
+        "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 00000000..8d1eb1e1
--- /dev/null
+++ b/flake.nix
@@ -0,0 +1,39 @@
+{
+    inputs = {
+        utils.url = "github:numtide/flake-utils";
+    };
+
+    outputs = { self, utils, nixpkgs, ...  }: utils.lib.eachDefaultSystem
+    (system:
+        let
+            pkgs = import nixpkgs { inherit system; };
+            version = with builtins; head (match ".*VERSION=([[:digit:].]+).*" (readFile ./docs/setup.bash));
+        in {
+        defaultPackage = with pkgs; stdenv.mkDerivation {
+            name = "refal-5-lambda";
+            inherit version;
+
+            src = ./.;
+
+            dontStrip = true;
+
+            patchPhase = ''
+                runHook prePatchPhase
+                find -type f -exec sed -i '1,1s\#!/bin/bash\#!${pkgs.bash}/bin/bash\' '{}' ';'
+                runHook postPatchPhase
+            '';
+            buildPhase = ''
+                runHook preBuildPhase
+                ./bootstrap.sh
+                runHook postBuildPhase
+            '';
+            installPhase = ''
+                runHook preInstallPhase
+                mkdir -p $out
+                mv bin lib c-plus-plus.conf.sh $out
+                runHook postInstallPhase
+            '';
+
+        };
+    });
+}