From bd77df6d6fdaea8ae0ab1f5581a76eb9db592e1d Mon Sep 17 00:00:00 2001
From: Doron Behar <doron.behar@gmail.com>
Date: Wed, 23 Sep 2020 00:56:00 +0300
Subject: [PATCH] arpack: assert that blas and lapack are compatible

Do it before buildInputs per:
https://github.com/NixOS/nixpkgs/pull/94892#discussion_r471110250

Remove unneed, BLAS_LIBS and LAPACK_LIBS from environment - the
libraries are detected just fine when in buildInputs.
---
 .../libraries/science/math/arpack/default.nix          | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/pkgs/development/libraries/science/math/arpack/default.nix b/pkgs/development/libraries/science/math/arpack/default.nix
index 057a2d4b397..0b927bb3eac 100644
--- a/pkgs/development/libraries/science/math/arpack/default.nix
+++ b/pkgs/development/libraries/science/math/arpack/default.nix
@@ -13,13 +13,15 @@ stdenv.mkDerivation rec {
   };
 
   nativeBuildInputs = [ cmake ];
-  buildInputs = [ gfortran blas lapack eigen ];
+  buildInputs = assert (blas.isILP64 == lapack.isILP64); [
+    gfortran
+    blas
+    lapack
+    eigen
+  ];
 
   doCheck = true;
 
-  BLAS_LIBS = "-L${blas}/lib -lblas";
-  LAPACK_LIBS = "-L${lapack}/lib -llapack";
-
   cmakeFlags = [
     "-DBUILD_SHARED_LIBS=ON"
     "-DINTERFACE64=${stdenv.lib.optionalString blas.isILP64 "1"}"