diff --git a/pkgs/tools/security/tor/default.nix b/pkgs/tools/security/tor/default.nix
index 7b022bc875c..f896e8c7b40 100644
--- a/pkgs/tools/security/tor/default.nix
+++ b/pkgs/tools/security/tor/default.nix
@@ -15,7 +15,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ libevent openssl zlib ];
 
-  NIX_CFLAGS_LINK = "-lgcc_s";
+  CFLAGS = "-lgcc_s";
 
   doCheck = true;