From 0207c32effd1b991cdc6986aae6f25854f0ba15a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sandro=20J=C3=A4ckel?= <sandro.jaeckel@gmail.com>
Date: Sun, 7 Mar 2021 15:49:31 +0100
Subject: [PATCH] giac: remove ? null

---
 pkgs/applications/science/math/giac/default.nix | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/pkgs/applications/science/math/giac/default.nix b/pkgs/applications/science/math/giac/default.nix
index 8c391e253224..f89fe3e1db36 100644
--- a/pkgs/applications/science/math/giac/default.nix
+++ b/pkgs/applications/science/math/giac/default.nix
@@ -1,10 +1,9 @@
 { stdenv, lib, fetchurl, fetchpatch, texlive, bison, flex, lapack, blas
 , gmp, mpfr, pari, ntl, gsl, mpfi, ecm, glpk, nauty
 , readline, gettext, libpng, libao, gfortran, perl
-, enableGUI ? false, libGL ? null, libGLU ? null, xorg ? null, fltk ? null
+, enableGUI ? false, libGL, libGLU, xorg, fltk
 }:
 
-assert enableGUI -> libGLU != null && libGL != null && xorg != null && fltk != null;
 assert (!blas.isILP64) && (!lapack.isILP64);
 
 stdenv.mkDerivation rec {