diff --git a/nix/default.nix b/nix/default.nix
index a8a34370c..d52a2cb17 100644
--- a/nix/default.nix
+++ b/nix/default.nix
@@ -49,6 +49,7 @@ in stdenv.mkDerivation rec {
       which
       lsb-release
       zerokitPkg
+      nim-unwrapped-2_0
       fakeGit
       fakeCargo
       fakeRustup
@@ -73,19 +74,10 @@ in stdenv.mkDerivation rec {
   preBuild = ''
     ln -s waku.nimble waku.nims
 
-    # Step 2: Clean and rebuild waku.nims
-    rm -rf waku.nims || true
-    make waku.nims
+    mkdir -p ./vendor/nimbus-build-system/vendor/Nim/bin/nim
+    USE_SYSTEM_NIM=1 ./vendor/nimbus-build-system/scripts/env.sh nim c vendor/nph/src/nph.nim
+    mv vendor/nph/src/nph ./vendor/nimbus-build-system/vendor/Nim/bin/nim
 
-    # Step 3: Build nph utility if it doesn't exist
-    NPH_PATH=$(dirname $(readlink -f vendor/nph/src/nph))
-    if [ ! -f "${NPH_PATH}/nph" ]; then
-      ${pkgs.envScript} nim c vendor/nph/src/nph.nim
-      mv vendor/nph/src/nph "${NPH_PATH}/nph"
-      echo "nph utility is available at ${NPH_PATH}/nph"
-    else
-      echo "nph utility already exists at ${NPH_PATH}/nph"
-    fi
     pushd vendor/nimbus-build-system/vendor/Nim
     mkdir dist
     cp -r ${callPackage ./nimble.nix {}}    dist/nimble