Nix Flakes

.envrc

@@ -0,0 +1 @@
+use flake

.gitignore

@@ -7,5 +7,5 @@ c-plus-plus.conf.sh
 /make-setup/_tmp
 
 CMakeLists.txt
-
-.idea/
+.direnv
+.idea/

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
+            '';
+
+        };
+    });
+}