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-rw-r--r--var/spack/repos/builtin/packages/hpx/package.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/hpx/package.py b/var/spack/repos/builtin/packages/hpx/package.py
index 23176aadc9..f62a939428 100644
--- a/var/spack/repos/builtin/packages/hpx/package.py
+++ b/var/spack/repos/builtin/packages/hpx/package.py
@@ -124,6 +124,9 @@ class Hpx(CMakePackage, CudaPackage, ROCmPackage):
depends_on("papi", when="instrumentation=papi")
depends_on("valgrind", when="instrumentation=valgrind")
+ # Only ROCm or CUDA maybe be enabled at once
+ conflicts("+rocm", when="+cuda")
+
# Restrictions for 1.8.X
with when("@1.8:"):
conflicts("cxxstd=14")