added flake

flake.nix

@@ -0,0 +1,38 @@
+{
+  description = "";
+
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+  };
+
+  outputs = {
+    self,
+    nixpkgs,
+  }: let
+    system = "x86_64-linux";
+    pkgs = nixpkgs.legacyPackages.${system};
+  in {
+    packages.${system} = {
+      default = pkgs.stdenvNoCC.mkDerivation {
+        name = "scannerExtract";
+        src = ./.;
+
+        buildInputs = with pkgs; [
+          opencv3
+          liblbfgs
+          qt6.full
+        ];
+
+        buildPhase = ''
+          mkdir $out
+          cd $out
+          cmake $src/scannerExtract/ -DCMAKE_BUILD_TYPE=release
+          make
+          # (make install)
+        '';
+      };
+    };
+  };
+}
+# http://www.dominik-ruess.de/scannerExtract/
+