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-rw-r--r--lib/spack/spack/architecture.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/lib/spack/spack/architecture.py b/lib/spack/spack/architecture.py
index 14a8c56793..dac3a45b79 100644
--- a/lib/spack/spack/architecture.py
+++ b/lib/spack/spack/architecture.py
@@ -207,7 +207,7 @@ class Arch(namedtuple("Arch", "platform platform_os target")):
self.platform_os.name + "-" + self.target.name)
def _cmp_key(self):
- return (self.platform.name, self.platform_os.name, self.target.name)
+ return (self.platform, self.platform_os, self.target)
def _helper_to_dict(arch_field_dict, arch_field_name, *args):