diff --git a/build.rs b/build.rs
index 5b8c911e..9a3fa7d9 100644
--- a/build.rs
+++ b/build.rs
@@ -242,9 +242,9 @@ fn build_v8(is_asan: bool) {
     gn_args.push("is_clang=false".to_string());
     gn_args.push("treat_warnings_as_errors=false".to_string());
     gn_args.push("line_tables_only=false".to_string());
-    gn_args.push(format!("use_gold=false"));
-    gn_args.push(format!("use_sysroot=false"));
-    gn_args.push(format!("use_lld=false"));
+    gn_args.push("use_gold=false".to_string());
+    gn_args.push("use_sysroot=false".to_string());
+    gn_args.push("use_lld=false".to_string());
     gn_args.push("v8_static_library=true".to_string());
     gn_args.push("clang_use_chrome_plugins=false".to_string());
     gn_args.push(format!(
@@ -256,7 +256,7 @@ fn build_v8(is_asan: bool) {
     let target = std::env::var("TARGET").unwrap();
     env::set_var("TOOLCHAIN", toolchain.join("bin").display().to_string());
     env::set_var(
-      format!("CC_{}", target.replace("-", "_")),
+      format!("CC_{}", target.replace('-', "_")),
       format!(
         "{}/bin/{}-cc",
         toolchain.display(),