1 files changed, 1 insertions, 1 deletions
diff --git a/pkgs/development/libraries/science/math/superlu/default.nix b/pkgs/development/libraries/science/math/superlu/default.nix
index 05ceb21387d3..ff59297bd839 100644
--- a/pkgs/development/libraries/science/math/superlu/default.nix
+++ b/pkgs/development/libraries/science/math/superlu/default.nix
@@ -1,7 +1,7 @@
 { stdenv, fetchurl, cmake,
   gfortran, blas, lapack}:
 
-assert (!blas.is64bit) && (!lapack.is64bit);
+assert (!blas.isILP64) && (!lapack.isILP64);
 
 stdenv.mkDerivation rec {
   version = "5.2.1";