diff --git a/build/toolchain/linux/unbundle/BUILD.gn b/build/toolchain/linux/unbundle/BUILD.gn
index a091491236bb1..d36fd4e652fbf 100644
--- a/build/toolchain/linux/unbundle/BUILD.gn
+++ b/build/toolchain/linux/unbundle/BUILD.gn
@@ -9,6 +9,7 @@ gcc_toolchain("default") {
   cxx = getenv("CXX")
   ar = getenv("AR")
   nm = getenv("NM")
+  readelf = getenv("READELF")
   ld = cxx
 
   extra_cflags = getenv("CFLAGS")
@@ -27,6 +28,7 @@ gcc_toolchain("host") {
   cxx = getenv("BUILD_CXX")
   ar = getenv("BUILD_AR")
   nm = getenv("BUILD_NM")
+  readelf = getenv("BUILD_READELF")
   ld = cxx
 
   extra_cflags = getenv("BUILD_CFLAGS")
@@ -35,7 +37,8 @@ gcc_toolchain("host") {
   extra_ldflags = getenv("BUILD_LDFLAGS")
 
   toolchain_args = {
-    current_cpu = current_cpu
-    current_os = current_os
+    current_cpu = host_cpu
+    current_os = host_os
+    v8_current_cpu = target_cpu
   }
 }