mactop: fix build (#541630)

pkgs/by-name/ma/mactop/package.nix

@@ -2,6 +2,7 @@
   lib,
   buildGoModule,
   fetchFromGitHub,
+  llvmPackages,
   versionCheckHook,
   nix-update-script,
 }:
@@ -21,6 +22,14 @@ buildGoModule rec {
 
   proxyVendor = true;
 
+  nativeBuildInputs = [ llvmPackages.lld ];
+
+  env = {
+    # Work around ld64's libc++ hardening issue.
+    # TODO: Remove once #536365 reaches this branch.
+    NIX_CFLAGS_LINK = "-fuse-ld=lld";
+  };
+
   ldflags = [
     "-s"
     "-w"