diff --git a/place_and_route/open_road.bzl b/place_and_route/open_road.bzl
index 8a3b9e59..8ed01ca3 100644
--- a/place_and_route/open_road.bzl
+++ b/place_and_route/open_road.bzl
@@ -259,7 +259,7 @@ def openroad_command(ctx, commands, input_db = None, step_name = None, inputs =
         },
         execution_requirements = execution_requirements,
         mnemonic = "OpenROAD",
-	toolchain = None,
+        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 a03fd273..a1b8cca7 100644
--- a/static_timing/build_defs.bzl
+++ b/static_timing/build_defs.bzl
@@ -54,7 +54,7 @@ def _run_opensta_impl(ctx):
         input_manifests = input_manifests,
         env = env,
         mnemonic = "RunningSTA",
-	toolchain = None,
+        toolchain = None,
     )
 
     return [
diff --git a/synthesis/build_defs.bzl b/synthesis/build_defs.bzl
index c110efbe..d8934fcc 100644
--- a/synthesis/build_defs.bzl
+++ b/synthesis/build_defs.bzl
@@ -150,7 +150,7 @@ def _synthesize_design_impl(ctx):
         input_manifests = input_manifests,
         env = env,
         mnemonic = "SynthesizingRTL",
-	toolchain = None,
+        toolchain = None,
     )
 
     return [