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-rw-r--r--lib/spack/spack/url.py3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/spack/spack/url.py b/lib/spack/spack/url.py
index f51f05cad7..ad51da9d47 100644
--- a/lib/spack/spack/url.py
+++ b/lib/spack/spack/url.py
@@ -206,6 +206,9 @@ def parse_version_offset(path):
# e.g. lame-398-1
(r'-((\d)+-\d)', stem),
+ # e.g. foobar_1.2-3
+ (r'_((\d+\.)+\d+(-\d+)?[a-z]?)', stem),
+
# e.g. foobar-4.5.1
(r'-((\d+\.)*\d+)$', stem),