diff --git a/Library/Homebrew/extend/os/mac/hardware.rb b/Library/Homebrew/extend/os/mac/hardware.rb
index 3cc0dab17d..2cc0d30b7e 100644
--- a/Library/Homebrew/extend/os/mac/hardware.rb
+++ b/Library/Homebrew/extend/os/mac/hardware.rb
@@ -36,7 +36,7 @@ module Hardware
     end
 
     if Hardware::CPU.intel? && version >= :mojave
-      "'-Ctarget-cpu=nehalem'"
+      "-Ctarget-cpu=nehalem"
     else
       generic_rustflags_target_cpu
     end
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index 0ddd74cc6c..a80ff7ac25 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -1543,8 +1543,7 @@ class Formula
   # Standard parameters for cargo builds.
   sig { params(root: T.any(String, Pathname), path: String).returns(T::Array[T.any(String, Pathname)]) }
   def std_cargo_args(root: prefix, path: ".")
-    ["--locked", "--root", root, "--path", path, "--config",
-     "build.rustflags=[#{Hardware.rustflags_target_cpu}]"]
+    ["--locked", "--root", root, "--path", path]
   end
 
   # Standard parameters for CMake builds.