add build-host tftp server

pkgs/tufted/default.nix

@@ -0,0 +1,44 @@
+{
+  lua5_3
+, stdenv
+, fennel
+, fetchFromGitHub
+, makeWrapper
+} :
+let
+  tufty-lua = lua.pkgs.buildLuaPackage {
+    pname = "tufty";
+    version = "1";
+    src = fetchFromGitHub {
+      owner = "telent";
+      repo = "tufty";
+      sha256 = "sha256-m5UEfcCNdG0Ku380cPhu1inNQmSfQJ5NcRIxLohUOh8=";
+      rev = "75c6d38713a82f4197f91dcb182a2e34f255bf7c";
+    };
+    buildPhase = ":";
+    installPhase = ''
+        mkdir -p "$out/share/lua/${lua5_3.luaversion}"
+        cp src/*.lua "$out/share/lua/${lua5_3.luaversion}/"
+      '';
+  };
+  lua = lua5_3.withPackages (ps: with ps; [
+    tufty-lua luasocket luaposix
+  ]);
+  fennel_ = (fennel.override { inherit lua; });
+in stdenv.mkDerivation {
+  pname = "tufted";
+  version = "1";
+  phases =  [ "unpackPhase" "installPhase" ];
+  buildInputs = [ lua fennel_ ];
+  nativeBuildInputs = [ makeWrapper ];
+  src = ./.;
+  installPhase = ''
+    mkdir -p $out/lib
+    cp tufted.fnl $out/lib
+    makeWrapper ${fennel_}/bin/fennel \
+      $out/bin/tufted \
+      --add-flags "--add-fennel-path $out/lib/?.fnl" \
+      --add-flags "--add-package-path $out/lib/?.lua" \
+      --add-flags "$out/lib/tufted.fnl"
+  '';
+}