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-rw-r--r--pkgs/development/libraries/libdvdplay/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/libdvdplay/default.nix b/pkgs/development/libraries/libdvdplay/default.nix
index b038d0e77dbb..7c4d67dbb021 100644
--- a/pkgs/development/libraries/libdvdplay/default.nix
+++ b/pkgs/development/libraries/libdvdplay/default.nix
@@ -1,6 +1,6 @@
 {stdenv, fetchurl, libdvdread}:
 
-assert !isNull libdvdread;
+assert libdvdread != null;
 
 derivation {
   name = "libdvdplay-1.0.1";