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-rw-r--r--var/spack/repos/builtin/packages/dealii/package.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/dealii/package.py b/var/spack/repos/builtin/packages/dealii/package.py
index 2176d6e179..23f1b918c0 100644
--- a/var/spack/repos/builtin/packages/dealii/package.py
+++ b/var/spack/repos/builtin/packages/dealii/package.py
@@ -289,6 +289,9 @@ class Dealii(CMakePackage, CudaPackage):
when="@:9.4 +ginkgo ^ginkgo@1.5.0:",
)
+ # deal.II's own CUDA backend does not support CUDA version 12.0 or newer.
+ conflicts("+cuda ^cuda@12:")
+
# Check for sufficiently modern versions
conflicts("cxxstd=11", when="@9.3:")