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-rw-r--r--var/spack/repos/builtin/packages/whizard/package.py4
1 files changed, 4 insertions, 0 deletions
diff --git a/var/spack/repos/builtin/packages/whizard/package.py b/var/spack/repos/builtin/packages/whizard/package.py
index 367a50e336..f7aee3ceb9 100644
--- a/var/spack/repos/builtin/packages/whizard/package.py
+++ b/var/spack/repos/builtin/packages/whizard/package.py
@@ -77,6 +77,10 @@ class Whizard(AutotoolsPackage):
conflicts('%intel@:17',
msg='The fortran compiler needs to support Fortran 2008. For more detailed information see https://whizard.hepforge.org/compilers.html')
+ # Trying to build in parallel leads to a race condition at the build step.
+ # See: https://github.com/key4hep/k4-spack/issues/71
+ parallel = False
+
def setup_build_environment(self, env):
# whizard uses the compiler during runtime,
# and seems incompatible with