diff --git a/nix/amqp-cpp.nix b/nix/amqp-cpp.nix
index c3bff418b..c3d1d4ddc 100644
--- a/nix/amqp-cpp.nix
+++ b/nix/amqp-cpp.nix
@@ -1,35 +1,34 @@
 { stdenv
 , lib
 , cmake
 , fetchFromGitHub
 , openssl
 , darwin
 }:
 
 stdenv.mkDerivation rec {
   pname = "amqp-cpp";
   version = "4.3.16";
 
   src = fetchFromGitHub {
     owner = "CopernicaMarketingSoftware";
     repo = "amqp-cpp";
     rev = "v${version}";
     sha256 = "sha256-aBLNdw9LhHFwnIt70vIYlX1/j2IUTmpm5Ub+ZImF8FI=";
   };
 
   nativeBuildInputs = [
     cmake
   ];
 
-  buildInputs = lib.optionals stdenv.isLinux [
-    # needed for linux's tcp extension
+  buildInputs = [
     openssl
   ];
 
-  cmakeFlags = lib.optionals (stdenv.isLinux || stdenv.isDarwin) [
+  cmakeFlags = [
     "-DAMQP-CPP_BUILD_SHARED=ON"
-  ] ++ lib.optionals stdenv.isLinux [
+    # Darwin is untested, which is why upstream uses linux in flag name
     "-DAMQP-CPP_LINUX_TCP=ON"
   ];
 }