diff --git a/pkgs/development/libraries/science/math/scs/default.nix b/pkgs/development/libraries/science/math/scs/default.nix
index 7f7171f67e5..2dcb47f11ba 100644
--- a/pkgs/development/libraries/science/math/scs/default.nix
+++ b/pkgs/development/libraries/science/math/scs/default.nix
@@ -1,5 +1,7 @@
 { stdenv, fetchFromGitHub, blas, lapack, gfortran, fixDarwinDylibNames }:
 
+assert (!blas.is64bit) && (!lapack.is64bit);
+
 stdenv.mkDerivation rec {
   pname = "scs";
   version = "2.1.1";
diff --git a/pkgs/top-level/release-alternatives.nix b/pkgs/top-level/release-alternatives.nix
index 230e20417bc..c31a03c8093 100644
--- a/pkgs/top-level/release-alternatives.nix
+++ b/pkgs/top-level/release-alternatives.nix
@@ -34,7 +34,7 @@ let
   ] ++ lib.optionals allowUnfree [ "magma" ];
   blas64Users = [
     "rspamd" "suitesparse_5_3" "suitesparse_4_4"
-    "suitesparse_4_2" "scs" "petsc" "magma" "cholmod-extra"
+    "suitesparse_4_2" "petsc" "cholmod-extra"
     "arpack" "qrupdate" "iml" "globalarrays" "arrayfire"
     "xfitter" "lammps" "plink-ng" "quantum-espresso"
     "calculix" "csdp" "getdp" "giac" "jags"