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-rw-r--r--nixpkgs/pkgs/applications/science/math/giac/default.nix2
1 files changed, 1 insertions, 1 deletions
diff --git a/nixpkgs/pkgs/applications/science/math/giac/default.nix b/nixpkgs/pkgs/applications/science/math/giac/default.nix
index be3c1e6dcc88..ea9c921f19e1 100644
--- a/nixpkgs/pkgs/applications/science/math/giac/default.nix
+++ b/nixpkgs/pkgs/applications/science/math/giac/default.nix
@@ -5,7 +5,7 @@
 }:
 
 assert enableGUI -> libGLU != null && libGL != null && xorg != null && fltk != null;
-assert (!blas.is64bit) && (!lapack.is64bit);
+assert (!blas.isILP64) && (!lapack.isILP64);
 
 stdenv.mkDerivation rec {
   pname = "giac${lib.optionalString enableGUI "-with-xcas"}";