diff --git a/pkgs/applications/science/chemistry/openmolcas/default.nix b/pkgs/applications/science/chemistry/openmolcas/default.nix
index d432e66a19f..317a83371ad 100644
--- a/pkgs/applications/science/chemistry/openmolcas/default.nix
+++ b/pkgs/applications/science/chemistry/openmolcas/default.nix
@@ -1,11 +1,9 @@
 { stdenv, fetchFromGitLab, cmake, gfortran, perl
-, openblas, blas, lapack, hdf5-cpp, python3, texlive
+, openblas, hdf5-cpp, python3, texlive
 , armadillo, openmpi, globalarrays, openssh
 , makeWrapper, fetchpatch
 } :
 
-assert blas.implementation == "openblas" && lapack.implementation == "openblas";
-
 let
   version = "20.10";
   gitLabRev = "v${version}";
@@ -74,7 +72,7 @@ in stdenv.mkDerivation {
     homepage = "https://gitlab.com/Molcas/OpenMolcas";
     maintainers = [ maintainers.markuskowa ];
     license = licenses.lgpl21;
-    platforms = platforms.linux;
+    platforms = [ "x86_64-linux" ];
   };
 }