Refactor flake patching/recursion

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

packages/littlelink-server/default.nix

@@ -1,6 +1,6 @@
 { pkgs, ... }:
 # AUTO-UPDATE: nix-update --flake --version=branch=main littlelink-server --subpackage yarnSrc
-pkgs.stdenv.mkDerivation rec {
+pkgs.stdenv.mkDerivation (finalAttrs: {
   pname = "littlelink-server";
   version = "0-unstable-2025-07-16";
 
@@ -12,10 +12,10 @@ pkgs.stdenv.mkDerivation rec {
   };
 
   yarnSrc = pkgs.stdenv.mkDerivation {
-    inherit src pname version;
+    inherit (finalAttrs) src pname version;
 
     offlineCache = pkgs.fetchYarnDeps {
-      yarnLock = src + "/yarn.lock";
+      yarnLock = finalAttrs.src + "/yarn.lock";
       hash = "sha256-nv1NgMm56wWlAYqqdH9UKTnWNhjxWBs1lmG+UCCQAzk=";
     };
 
@@ -29,24 +29,24 @@ pkgs.stdenv.mkDerivation rec {
     yarnBuildFlags = [ "--noninteractive" ];
 
     installPhase = ''
-      mkdir -p $out/lib/${pname}
-      cp -r build node_modules $out/lib/${pname}
+      mkdir -p $out/lib/${finalAttrs.pname}
+      cp -r build node_modules $out/lib/${finalAttrs.pname}
     '';
   };
 
   wrapper = pkgs.writeShellApplication {
-    name = pname;
+    name = finalAttrs.pname;
     runtimeInputs = with pkgs; [ nodejs_20 ];
     text = ''
-      cd ${yarnSrc}/lib/${pname}
+      cd ${finalAttrs.yarnSrc}/lib/${finalAttrs.pname}
       exec node build/server.js "$@"
     '';
   };
 
   installPhase = ''
     mkdir -p $out/bin
-    cp ${wrapper}/bin/${pname} $out/bin/
+    cp ${finalAttrs.wrapper}/bin/${finalAttrs.pname} $out/bin/
   '';
 
-  meta.mainProgram = pname;
-}
+  meta.mainProgram = finalAttrs.pname;
+})