diff --git a/pkgs/applications/networking/irc/bip/default.nix b/pkgs/applications/networking/irc/bip/default.nix
index ee9a6392e07e..e391f0074c5a 100644
--- a/pkgs/applications/networking/irc/bip/default.nix
+++ b/pkgs/applications/networking/irc/bip/default.nix
@@ -30,10 +30,7 @@ in stdenv.mkDerivation {
     }
   ];
 
-  postPatch = ''
-  '';
-
-  configureFlags = [ "--disable-pie" ];
+  NIX_CFLAGS_COMPILE = "-Wno-error=unused-result";
 
   buildInputs = [ bison flex autoconf automake openssl ];