1 files changed, 1 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/applications/science/chemistry/octopus/default.nix b/nixpkgs/pkgs/applications/science/chemistry/octopus/default.nix
index f30954367cf7..adb31d326509 100644
--- a/nixpkgs/pkgs/applications/science/chemistry/octopus/default.nix
+++ b/nixpkgs/pkgs/applications/science/chemistry/octopus/default.nix
@@ -2,7 +2,7 @@
 , libyaml, libxc, fftw, blas, lapack, gsl, netcdf, arpack, autoreconfHook
 }:
 
-assert (!blas.is64bit) && (!lapack.is64bit);
+assert (!blas.isILP64) && (!lapack.isILP64);
 
 stdenv.mkDerivation rec {
   pname = "octopus";