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-rw-r--r--lib/spack/spack/build_systems/makefile.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/spack/spack/build_systems/makefile.py b/lib/spack/spack/build_systems/makefile.py
index eec4d13801..75574a6130 100644
--- a/lib/spack/spack/build_systems/makefile.py
+++ b/lib/spack/spack/build_systems/makefile.py
@@ -10,6 +10,7 @@ from typing import List # novm
import llnl.util.tty as tty
from llnl.util.filesystem import working_dir
+from spack.directives import conflicts
from spack.package import PackageBase, run_after
@@ -55,6 +56,7 @@ class MakefilePackage(PackageBase):
#: phase
install_targets = ['install']
+ conflicts('platform=windows')
#: Callback names for build-time test
build_time_test_callbacks = ['check']