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-rw-r--r--var/spack/repos/builtin/packages/regcm/package.py6
1 files changed, 4 insertions, 2 deletions
diff --git a/var/spack/repos/builtin/packages/regcm/package.py b/var/spack/repos/builtin/packages/regcm/package.py
index a732f6c343..f9a1b7c65c 100644
--- a/var/spack/repos/builtin/packages/regcm/package.py
+++ b/var/spack/repos/builtin/packages/regcm/package.py
@@ -25,8 +25,10 @@ class Regcm(AutotoolsPackage):
# producing a so-called fat binary. Unfortunately, gcc builds only the last
# architecture provided (in the configure), so we allow a single arch.
extensions = ('knl', 'skl', 'bdw', 'nhl')
- variant('extension', default=None, values=extensions, multi=True,
- description='Build extensions for a specific Intel architecture.')
+ variant(
+ 'extension', values=any_combination_of(extensions),
+ description='Build extensions for a specific Intel architecture.'
+ )
depends_on('netcdf')
depends_on('netcdf-fortran')