diff --git a/pkgs/tools/networking/ntp/default.nix b/pkgs/tools/networking/ntp/default.nix
index b84c9cccfeb0..88ec3f380a51 100644
--- a/pkgs/tools/networking/ntp/default.nix
+++ b/pkgs/tools/networking/ntp/default.nix
@@ -9,6 +9,7 @@ stdenv.mkDerivation {
     md5 = "916fe57525f8327f340b203f129088fa";
   };
   configureFlags = "
+    --without-crypto
     ${if stdenv.isLinux then "--enable-linuxcaps" else ""}
   ";
   buildInputs = if stdenv.isLinux then [libcap] else [];