diff --git a/var/spack/repos/builtin/packages/sirius/package.py b/var/spack/repos/builtin/packages/sirius/package.py
index 8716f89ef2..e9b6b5cd45 100644
--- a/var/spack/repos/builtin/packages/sirius/package.py
+++ b/var/spack/repos/builtin/packages/sirius/package.py
@@ -342,8 +342,10 @@ def cmake_args(self):
                     )
 
                 # Make SIRIUS handle it
+                elif "@6:7.4.3" in spec:
+                    args.append(self.define("CMAKE_CUDA_ARCH", ";".join(cuda_arch)))
                 else:
-                    args.append(self.define("CUDA_ARCH", ";".join(cuda_arch)))
+                    args.append(self.define("CMAKE_CUDA_ARCHITECTURES", ";".join(cuda_arch)))
 
         if "+rocm" in spec:
             archs = ",".join(self.spec.variants["amdgpu_target"].value)