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-rw-r--r--var/spack/repos/builtin/packages/lammps/package.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/var/spack/repos/builtin/packages/lammps/package.py b/var/spack/repos/builtin/packages/lammps/package.py
index 2320cf0050..5bf2986858 100644
--- a/var/spack/repos/builtin/packages/lammps/package.py
+++ b/var/spack/repos/builtin/packages/lammps/package.py
@@ -150,7 +150,7 @@ class Lammps(CMakePackage, CudaPackage):
args.append('-DPKG_GPU=ON')
args.append('-DGPU_API=cuda')
cuda_arch = spec.variants['cuda_arch'].value
- if cuda_arch is not None:
+ if cuda_arch != 'none':
args.append('-DGPU_ARCH=sm_{0}'.format(cuda_arch[0]))
args.append('-DCUDA_MPS_SUPPORT={0}'.format(
'ON' if '+cuda_mps' in spec else 'OFF'))