From 911286892b780a45f4036a87815d12d9fce75d2a Mon Sep 17 00:00:00 2001
From: Ian-Woo Kim <ianwookim@gmail.com>
Date: Wed, 30 Oct 2024 05:46:42 -0700
Subject: [PATCH] handle pkgname = None case

---
 haskell/compile.bzl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/haskell/compile.bzl b/haskell/compile.bzl
index 5771cc3a7..d72811df3 100644
--- a/haskell/compile.bzl
+++ b/haskell/compile.bzl
@@ -446,9 +446,10 @@ def _common_compile_module_args(
     direct_deps_info: list[HaskellLibraryInfoTSet],
     pkgname: str | None = None,
 ) -> CommonCompileModuleArgs:
+
     command = cmd_args(ghc_wrapper)
     command.add("--ghc", haskell_toolchain.compiler)
-    if haskell_toolchain.use_persistent_workers:
+    if haskell_toolchain.use_persistent_workers and pkgname:
         worker_target_id = pkgname
         command.add("--worker-target-id", worker_target_id)
     # Some rules pass in RTS (e.g. `+RTS ... -RTS`) options for GHC, which can't