Revert "Merge pull request #101780 from glittershark/bump-openblas"

Hash is updated but not the version.

This reverts commit 8b98955451, reversing
changes made to 5e2fde0a4f.

pkgs/development/libraries/science/math/openblas/default.nix

@@ -114,7 +114,7 @@ stdenv.mkDerivation rec {
     owner = "xianyi";
     repo = "OpenBLAS";
     rev = "v${version}";
-    sha256 = "0mk1kjkr96bvvcq2zigzjrs0cnhwsf6gfi0855mp9yifn8lvp20y";
+    sha256 = "174id98ga82bhz2v7sy9yj6pqy0h0088p3mkdikip69p9rh3d17b";
   };
 
   inherit blas64;
@@ -144,6 +144,12 @@ stdenv.mkDerivation rec {
     buildPackages.stdenv.cc
   ];
 
+  # Disable an optimisation which seems to cause issues, pending an
+  # upstream fix: https://github.com/xianyi/OpenBLAS/issues/2496
+  patches = stdenv.lib.optionals stdenv.hostPlatform.isAarch64 [
+    ./0001-Disable-optimised-aarch64-dgemm_beta-pending-fix.patch
+  ];
+
   makeFlags = mkMakeFlagsFromConfig (config // {
     FC = "${stdenv.cc.targetPrefix}gfortran";
     CC = "${stdenv.cc.targetPrefix}${if stdenv.cc.isClang then "clang" else "cc"}";