Added a nix derivation

default.nix

@@ -0,0 +1,23 @@
+{pkgs ? import <nixpkgs> {}, ...}:
+
+let
+  unilldSrc = builtins.fetchGit {
+    url = "https://git.emin.engineer/haxala1r/unildd.git";
+    ref = "nix";
+  };
+  unilld = import unilldSrc {inherit pkgs;};
+in
+pkgs.buildGoModule {
+  pname = "objdetect";
+  version = "";
+  vendorHash = null; # no go dependencies.
+
+  src = pkgs.lib.cleanSource ./.;
+
+  buildInputs = [unilld];
+  #CGO_ENABLED = 1;
+  preBuild = ''
+ln -s ${unilld}/lib/ ./lib
+ln -s ${unilld}/include/ ./include
+'';
+}