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-rw-r--r--var/spack/repos/builtin/packages/slepc/package.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/slepc/package.py b/var/spack/repos/builtin/packages/slepc/package.py
index e208400eea..17c512119c 100644
--- a/var/spack/repos/builtin/packages/slepc/package.py
+++ b/var/spack/repos/builtin/packages/slepc/package.py
@@ -41,6 +41,8 @@ class Slepc(Package):
variant('arpack', default=True, description='Enables Arpack wrappers')
+ # NOTE: make sure PETSc and SLEPc use the same python.
+ depends_on('python@2.6:2.7', type='build')
depends_on('petsc@3.7:', when='@3.7.1:')
depends_on('petsc@3.6.3:3.6.4', when='@3.6.2:3.6.3')
depends_on('arpack-ng~mpi', when='+arpack^petsc~mpi')