diff --git a/place_and_route/open_road.bzl b/place_and_route/open_road.bzl
index 5af6a26e..8a3b9e59 100644
--- a/place_and_route/open_road.bzl
+++ b/place_and_route/open_road.bzl
@@ -259,6 +259,7 @@ def openroad_command(ctx, commands, input_db = None, step_name = None, inputs =
         },
         execution_requirements = execution_requirements,
         mnemonic = "OpenROAD",
+	toolchain = None,
     )
 
     return struct(db = output_db, log_file = log_file)
diff --git a/static_timing/build_defs.bzl b/static_timing/build_defs.bzl
index 0bdcc25b..a03fd273 100644
--- a/static_timing/build_defs.bzl
+++ b/static_timing/build_defs.bzl
@@ -54,6 +54,7 @@ def _run_opensta_impl(ctx):
         input_manifests = input_manifests,
         env = env,
         mnemonic = "RunningSTA",
+	toolchain = None,
     )
 
     return [
diff --git a/synthesis/build_defs.bzl b/synthesis/build_defs.bzl
index 383acae4..c110efbe 100644
--- a/synthesis/build_defs.bzl
+++ b/synthesis/build_defs.bzl
@@ -150,6 +150,7 @@ def _synthesize_design_impl(ctx):
         input_manifests = input_manifests,
         env = env,
         mnemonic = "SynthesizingRTL",
+	toolchain = None,
     )
 
     return [