diff --git a/pkgs/development/libraries/nss/default.nix b/pkgs/development/libraries/nss/default.nix
index ba6704bc144..12a2e49e929 100644
--- a/pkgs/development/libraries/nss/default.nix
+++ b/pkgs/development/libraries/nss/default.nix
@@ -19,7 +19,7 @@ in stdenv.mkDerivation rec {
 
   depsBuildBuild = [ buildPackages.stdenv.cc ];
 
-  nativeBuildInputs = [ perl ninja (buildPackages.python2.withPackages (ps: with ps; [ gyp ])) ];
+  nativeBuildInputs = [ perl ninja (buildPackages.python3.withPackages (ps: with ps; [ gyp ])) ];
 
   buildInputs = [ zlib sqlite ]
     ++ stdenv.lib.optional stdenv.isDarwin fixDarwinDylibNames;