diff --git a/pkgs/build-support/node/fetch-pnpm-deps/default.nix b/pkgs/build-support/node/fetch-pnpm-deps/default.nix
index 4669d4909b7f..cb92599d5cf6 100644
--- a/pkgs/build-support/node/fetch-pnpm-deps/default.nix
+++ b/pkgs/build-support/node/fetch-pnpm-deps/default.nix
@@ -209,10 +209,7 @@ in
 
           passthru = args.passthru or { } // {
             inherit fetcherVersion;
-            serve = callPackage ./serve.nix {
-              inherit pnpm; # from args
-              pnpmDeps = finalAttrs.finalPackage;
-            };
+            serve = throw "fetchPnpmDeps: `serve` has been deprecated as it was removed in pnpm 11 and only had a niche use case."; # Added 2026-06-04
           };
 
           dontConfigure = true;
diff --git a/pkgs/build-support/node/fetch-pnpm-deps/serve.nix b/pkgs/build-support/node/fetch-pnpm-deps/serve.nix
deleted file mode 100644
index 2c3292180d8f..000000000000
--- a/pkgs/build-support/node/fetch-pnpm-deps/serve.nix
+++ /dev/null
@@ -1,43 +0,0 @@
-{
-  writeShellApplication,
-  pnpm,
-  pnpmDeps,
-  zstd,
-  lib,
-}:
-
-writeShellApplication {
-  name = "serve-pnpm-store";
-
-  runtimeInputs = [
-    pnpm
-    zstd
-  ];
-
-  text = ''
-    storePath=$(mktemp -d)
-
-    clean() {
-      echo "Cleaning up temporary store at '$storePath'..."
-
-      rm -rf "$storePath"
-    }
-
-    echo "Copying pnpm store '${pnpmDeps}' to temporary store..."
-
-    tar --zstd -xf "${pnpmDeps}/pnpm-store.tar.zst" -C "$storePath"
-
-    chmod -R +w "$storePath"
-
-    echo "Run 'pnpm install --store-dir \"$storePath\"' to install packages from this store."
-
-    trap clean EXIT
-
-    pnpm server start \
-      --store-dir "$storePath"
-  '';
-
-  meta = {
-    broken = lib.versionAtLeast pnpm.version "11";
-  };
-}