diff --git a/pkgs/tools/system/gotop/default.nix b/pkgs/tools/system/gotop/default.nix
index 0adbb2c4faf9..3c220cf9fd05 100644
--- a/pkgs/tools/system/gotop/default.nix
+++ b/pkgs/tools/system/gotop/default.nix
@@ -32,9 +32,6 @@ buildGoModule rec {
     "-X main.Version=v${version}"
   ];
 
-  # prevent `error: 'TARGET_OS_MAC' is not defined`
-  env.CGO_CFLAGS = "-Wno-undef-prefix";
-
   nativeBuildInputs = [ installShellFiles ];
 
   buildInputs = lib.optionals stdenv.hostPlatform.isDarwin [ IOKit ];