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-rw-r--r--pkgs/applications/science/math/giac/default.nix1
1 files changed, 1 insertions, 0 deletions
diff --git a/pkgs/applications/science/math/giac/default.nix b/pkgs/applications/science/math/giac/default.nix
index feb30b990abb..be3c1e6dcc88 100644
--- a/pkgs/applications/science/math/giac/default.nix
+++ b/pkgs/applications/science/math/giac/default.nix
@@ -5,6 +5,7 @@
 }:
 
 assert enableGUI -> libGLU != null && libGL != null && xorg != null && fltk != null;
+assert (!blas.is64bit) && (!lapack.is64bit);
 
 stdenv.mkDerivation rec {
   pname = "giac${lib.optionalString enableGUI "-with-xcas"}";