diff --git a/pkgs/servers/tacacsplus/default.nix b/pkgs/servers/tacacsplus/default.nix
index 5010838cbe0d..296b79f0a444 100644
--- a/pkgs/servers/tacacsplus/default.nix
+++ b/pkgs/servers/tacacsplus/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, tcp_wrappers, flex, bison, perl }:
+{ stdenv, fetchurl, tcp_wrappers, flex, bison, perl, libnsl }:
 
 stdenv.mkDerivation rec {
   pname = "tacacsplus";
@@ -10,7 +10,7 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ flex bison ];
-  buildInputs = [ tcp_wrappers perl ];
+  buildInputs = [ tcp_wrappers perl libnsl ];
 
   meta = with stdenv.lib; {
     description = "A protocol for authentication, authorization and accounting (AAA) services for routers and network devices";