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-rw-r--r--var/spack/repos/builtin/packages/valgrind/package.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/var/spack/repos/builtin/packages/valgrind/package.py b/var/spack/repos/builtin/packages/valgrind/package.py
index a32760aed7..5691af014c 100644
--- a/var/spack/repos/builtin/packages/valgrind/package.py
+++ b/var/spack/repos/builtin/packages/valgrind/package.py
@@ -36,7 +36,7 @@ class Valgrind(AutotoolsPackage):
description='Activates boost support for valgrind')
variant('only64bit', default=True,
description='Sets --enable-only64bit option for valgrind')
- variant('ubsan', default=True,
+ variant('ubsan', default=sys.platform != 'darwin',
description='Activates ubsan support for valgrind')
conflicts('+ubsan', when='platform=darwin %clang',