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-rw-r--r--lib/spack/external/__init__.py13
1 files changed, 9 insertions, 4 deletions
diff --git a/lib/spack/external/__init__.py b/lib/spack/external/__init__.py
index 578a21df93..0f81f37802 100644
--- a/lib/spack/external/__init__.py
+++ b/lib/spack/external/__init__.py
@@ -118,12 +118,17 @@ pytest
vendored copy ever needs to be updated again:
https://github.com/spack/spack/pull/6801/commits/ff513c39f2c67ff615de5cbc581dd69a8ec96526
-pyyaml
+ruamel.yaml
------
-* Homepage: https://pypi.python.org/pypi/PyYAML
-* Usage: Used for config files.
-* Version: 3.12
+* Homepage: https://yaml.readthedocs.io/
+* Usage: Used for config files. Ruamel is based on PyYAML but is more
+ actively maintained and has more features, including round-tripping
+ comments read from config files.
+* Version: 0.11.15 (last version supporting Python 2.6)
+* Note: This package has been slightly modified to improve Python 2.6
+ compatibility -- some ``{}`` format strings were replaced, and the
+ import for ``OrderedDict`` was tweaked.
six
---