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-rw-r--r--lib/spack/spack/environment.py10
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/spack/spack/environment.py b/lib/spack/spack/environment.py
index 4ab01cb250..f16599c215 100644
--- a/lib/spack/spack/environment.py
+++ b/lib/spack/spack/environment.py
@@ -833,8 +833,16 @@ class Environment(object):
if not matches:
# concrete specs match against concrete specs in the env
+ # by *dag hash*, not build hash.
+ dag_hashes_in_order = [
+ self.specs_by_hash[build_hash].dag_hash()
+ for build_hash in self.concretized_order
+ ]
+
specs_hashes = zip(
- self.concretized_user_specs, self.concretized_order)
+ self.concretized_user_specs, dag_hashes_in_order
+ )
+
matches = [
s for s, h in specs_hashes
if query_spec.dag_hash() == h