diff --git a/pkgs/applications/audio/ncmpcpp/default.nix b/pkgs/applications/audio/ncmpcpp/default.nix
index fee5dc88403f..ed21f047d87b 100644
--- a/pkgs/applications/audio/ncmpcpp/default.nix
+++ b/pkgs/applications/audio/ncmpcpp/default.nix
@@ -10,15 +10,11 @@
 , icu
 , curl
 , outputsSupport ? true # outputs screen
-, visualizerSupport ? false, fftw ? null # visualizer screen
+, visualizerSupport ? false, fftw # visualizer screen
 , clockSupport ? true # clock screen
-, taglibSupport ? true, taglib ? null # tag editor
+, taglibSupport ? true, taglib # tag editor
 }:
 
-assert visualizerSupport -> (fftw != null);
-assert taglibSupport -> (taglib != null);
-
-with lib;
 stdenv.mkDerivation rec {
   pname = "ncmpcpp";
   version = "0.9.2";
@@ -30,18 +26,18 @@ stdenv.mkDerivation rec {
 
   enableParallelBuilding = true;
   configureFlags = [ "BOOST_LIB_SUFFIX=" ]
-    ++ optional outputsSupport "--enable-outputs"
-    ++ optional visualizerSupport "--enable-visualizer --with-fftw"
-    ++ optional clockSupport "--enable-clock"
-    ++ optional taglibSupport "--with-taglib";
+    ++ lib.optional outputsSupport "--enable-outputs"
+    ++ lib.optional visualizerSupport "--enable-visualizer --with-fftw"
+    ++ lib.optional clockSupport "--enable-clock"
+    ++ lib.optional taglibSupport "--with-taglib";
 
   nativeBuildInputs = [ pkg-config ];
 
   buildInputs = [ boost libmpdclient ncurses readline libiconv icu curl ]
-    ++ optional visualizerSupport fftw
-    ++ optional taglibSupport taglib;
+    ++ lib.optional visualizerSupport fftw
+    ++ lib.optional taglibSupport taglib;
 
-  meta = {
+  meta = with lib; {
     description = "A featureful ncurses based MPD client inspired by ncmpc";
     homepage    = "https://rybczak.net/ncmpcpp/";
     changelog   = "https://github.com/ncmpcpp/ncmpcpp/blob/${version}/CHANGELOG.md";