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-rw-r--r--pkgs/development/libraries/gnome/GConf/default.nix6
1 files changed, 3 insertions, 3 deletions
diff --git a/pkgs/development/libraries/gnome/GConf/default.nix b/pkgs/development/libraries/gnome/GConf/default.nix
index 0c6f0dfe0105..31f144b1d79d 100644
--- a/pkgs/development/libraries/gnome/GConf/default.nix
+++ b/pkgs/development/libraries/gnome/GConf/default.nix
@@ -1,8 +1,8 @@
 {stdenv, fetchurl, pkgconfig, perl, glib, gtk, libxml2, ORBit2, popt}:
 
-assert !isNull pkgconfig && !isNull perl
-  && !isNull glib && !isNull gtk
-  && !isNull libxml2 && !isNull ORBit2 && !isNull popt;
+assert pkgconfig != null && perl != null
+  && glib != null && gtk != null
+  && libxml2 != null && ORBit2 != null && popt != null;
 
 derivation {
   name = "GConf-2.4.0.1";