diff --git a/pkgs/development/libraries/igraph/default.nix b/pkgs/development/libraries/igraph/default.nix
index 69778f034829..9381f1b9ea30 100644
--- a/pkgs/development/libraries/igraph/default.nix
+++ b/pkgs/development/libraries/igraph/default.nix
@@ -21,6 +21,10 @@
 , xmlto
 }:
 
+assert (blas.isILP64 == lapack.isILP64 &&
+        blas.isILP64 == arpack.isILP64 &&
+        !blas.isILP64);
+
 stdenv.mkDerivation rec {
   pname = "igraph";
   version = "0.9.10";