diff --git a/pkgs/applications/science/chemistry/openmolcas/default.nix b/pkgs/applications/science/chemistry/openmolcas/default.nix
index d67ecf21d7f1..2b17fb368364 100644
--- a/pkgs/applications/science/chemistry/openmolcas/default.nix
+++ b/pkgs/applications/science/chemistry/openmolcas/default.nix
@@ -101,7 +101,6 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = [
     "-DOPENMP=ON"
-    "-DLINALG=OpenBLAS"
     "-DTOOLS=ON"
     "-DHDF5=ON"
     "-DFDE=ON"